./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_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/safe004_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe004_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-eb4cb34-m [2024-06-21 20:03:00,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:03:00,631 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:03:00,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:03:00,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:03:00,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:03:00,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:03:00,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:03:00,651 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:03:00,651 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:03:00,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:03:00,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:03:00,653 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:03:00,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:03:00,653 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:03:00,653 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:03:00,654 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:03:00,654 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:03:00,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:03:00,655 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:03:00,655 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:03:00,655 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:03:00,656 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:03:00,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:03:00,656 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:03:00,657 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:03:00,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:03:00,657 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:03:00,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:03:00,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:03:00,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:03:00,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:03:00,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:00,659 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:03:00,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:03:00,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:03:00,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:03:00,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:03:00,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:03:00,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:03:00,661 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:03:00,676 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:03:00,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:03:00,677 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:03:00,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:03:00,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:03:00,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:03:00,919 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:03:00,920 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:03:00,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe004_tso.yml/witness.yml [2024-06-21 20:03:01,156 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:03:01,157 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:03:01,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-21 20:03:02,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:03:02,422 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:03:02,425 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-21 20:03:02,441 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96341d9d2/60f5add773db4a42b9b81a880616708b/FLAGafaa9cfbc [2024-06-21 20:03:02,467 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96341d9d2/60f5add773db4a42b9b81a880616708b [2024-06-21 20:03:02,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:03:02,469 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:03:02,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:02,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:03:02,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:03:02,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:01" (1/2) ... [2024-06-21 20:03:02,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254370fc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:02, skipping insertion in model container [2024-06-21 20:03:02,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:01" (1/2) ... [2024-06-21 20:03:02,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7dfbbb1d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:02, skipping insertion in model container [2024-06-21 20:03:02,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:02" (2/2) ... [2024-06-21 20:03:02,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254370fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:02, skipping insertion in model container [2024-06-21 20:03:02,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:02" (2/2) ... [2024-06-21 20:03:02,478 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:03:02,512 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:03:02,513 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:03:02,513 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:03:02,513 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:03:02,513 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:03:02,513 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-21 20:03:02,547 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:03:02,849 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:02,856 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:03:02,967 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:03,000 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:03:03,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03 WrapperNode [2024-06-21 20:03:03,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:03,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:03,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:03:03,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:03:03,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,041 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 20:03:03,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:03,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:03:03,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:03:03,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:03:03,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,053 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,064 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:03:03,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,069 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:03:03,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:03:03,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:03:03,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:03:03,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (1/1) ... [2024-06-21 20:03:03,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:03,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:03:03,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:03:03,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:03:03,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:03:03,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:03:03,147 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:03:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:03:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:03:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:03:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:03:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:03:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:03:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:03:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:03:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:03:03,150 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:03:03,279 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:03:03,281 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:03:03,512 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:03:03,513 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:03:03,600 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:03:03,601 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:03:03,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:03 BoogieIcfgContainer [2024-06-21 20:03:03,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:03:03,605 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:03:03,605 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:03:03,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:03:03,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:01" (1/4) ... [2024-06-21 20:03:03,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148d3194 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:03:03, skipping insertion in model container [2024-06-21 20:03:03,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:03:02" (2/4) ... [2024-06-21 20:03:03,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148d3194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:03:03, skipping insertion in model container [2024-06-21 20:03:03,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:03" (3/4) ... [2024-06-21 20:03:03,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148d3194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:03:03, skipping insertion in model container [2024-06-21 20:03:03,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:03" (4/4) ... [2024-06-21 20:03:03,612 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-06-21 20:03:03,625 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:03:03,625 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:03:03,625 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:03:03,663 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:03:03,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:03:03,724 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 20:03:03,724 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:03,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:03:03,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:03:03,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 20:03:03,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:03:03,754 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;@3da550c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:03:03,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:03:03,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:03:03,756 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:03:03,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:03,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:03,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:03:03,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:03,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 218856700, now seen corresponding path program 1 times [2024-06-21 20:03:03,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:03,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826618409] [2024-06-21 20:03:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:04,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:04,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826618409] [2024-06-21 20:03:04,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826618409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:04,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:04,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:03:04,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627837101] [2024-06-21 20:03:04,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:04,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:03:04,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:03:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:03:04,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 20:03:04,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:04,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 20:03:04,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:04,368 INFO L124 PetriNetUnfolderBase]: 606/1001 cut-off events. [2024-06-21 20:03:04,368 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 20:03:04,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 1001 events. 606/1001 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5021 event pairs, 384 based on Foata normal form. 1/957 useless extension candidates. Maximal degree in co-relation 2005. Up to 941 conditions per place. [2024-06-21 20:03:04,390 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 20:03:04,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-21 20:03:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:03:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:03:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-21 20:03:04,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-21 20:03:04,403 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 83 transitions. [2024-06-21 20:03:04,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-21 20:03:04,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:04,407 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 20:03:04,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 20:03:04,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 20:03:04,411 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 20:03:04,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:04,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:04,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:03:04,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:04,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash -131900529, now seen corresponding path program 1 times [2024-06-21 20:03:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:04,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299947107] [2024-06-21 20:03:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:04,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:04,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299947107] [2024-06-21 20:03:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299947107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:04,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:04,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:03:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496379423] [2024-06-21 20:03:04,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:03:04,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:03:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:03:04,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:04,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:04,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:04,767 INFO L124 PetriNetUnfolderBase]: 934/1509 cut-off events. [2024-06-21 20:03:04,767 INFO L125 PetriNetUnfolderBase]: For 300/348 co-relation queries the response was YES. [2024-06-21 20:03:04,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3425 conditions, 1509 events. 934/1509 cut-off events. For 300/348 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7384 event pairs, 530 based on Foata normal form. 3/1482 useless extension candidates. Maximal degree in co-relation 3413. Up to 1399 conditions per place. [2024-06-21 20:03:04,780 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 20:03:04,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 248 flow [2024-06-21 20:03:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 20:03:04,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-21 20:03:04,784 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 103 transitions. [2024-06-21 20:03:04,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 248 flow [2024-06-21 20:03:04,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:04,788 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-21 20:03:04,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 20:03:04,789 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 20:03:04,789 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-21 20:03:04,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:04,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:04,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:03:04,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:04,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:04,793 INFO L85 PathProgramCache]: Analyzing trace with hash 206052061, now seen corresponding path program 1 times [2024-06-21 20:03:04,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:04,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151536606] [2024-06-21 20:03:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:04,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:04,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:04,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151536606] [2024-06-21 20:03:04,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151536606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:04,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:04,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:04,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851557940] [2024-06-21 20:03:04,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:04,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:04,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:04,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:04,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:04,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:05,109 INFO L124 PetriNetUnfolderBase]: 972/1587 cut-off events. [2024-06-21 20:03:05,109 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-06-21 20:03:05,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 1587 events. 972/1587 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7859 event pairs, 304 based on Foata normal form. 7/1585 useless extension candidates. Maximal degree in co-relation 3986. Up to 1312 conditions per place. [2024-06-21 20:03:05,118 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-21 20:03:05,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 81 transitions, 424 flow [2024-06-21 20:03:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 20:03:05,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-21 20:03:05,120 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 140 transitions. [2024-06-21 20:03:05,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 81 transitions, 424 flow [2024-06-21 20:03:05,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 422 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:05,123 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 276 flow [2024-06-21 20:03:05,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-06-21 20:03:05,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 20:03:05,124 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 276 flow [2024-06-21 20:03:05,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:05,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:05,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:03:05,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:05,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:05,125 INFO L85 PathProgramCache]: Analyzing trace with hash -410706608, now seen corresponding path program 1 times [2024-06-21 20:03:05,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:05,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727189652] [2024-06-21 20:03:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:05,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:05,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:05,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727189652] [2024-06-21 20:03:05,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727189652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:05,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:05,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:05,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284007449] [2024-06-21 20:03:05,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:05,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:05,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:05,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:05,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:05,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:05,577 INFO L124 PetriNetUnfolderBase]: 1054/1741 cut-off events. [2024-06-21 20:03:05,577 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-21 20:03:05,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5472 conditions, 1741 events. 1054/1741 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8907 event pairs, 197 based on Foata normal form. 26/1758 useless extension candidates. Maximal degree in co-relation 5452. Up to 1290 conditions per place. [2024-06-21 20:03:05,589 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-21 20:03:05,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 91 transitions, 576 flow [2024-06-21 20:03:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 20:03:05,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-21 20:03:05,593 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 276 flow. Second operand 6 states and 164 transitions. [2024-06-21 20:03:05,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 91 transitions, 576 flow [2024-06-21 20:03:05,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 566 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:05,602 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 337 flow [2024-06-21 20:03:05,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-21 20:03:05,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 20:03:05,605 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 337 flow [2024-06-21 20:03:05,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:05,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:05,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:03:05,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:05,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1224206505, now seen corresponding path program 1 times [2024-06-21 20:03:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:05,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663682391] [2024-06-21 20:03:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:05,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:05,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663682391] [2024-06-21 20:03:05,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663682391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:05,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:05,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:03:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028448403] [2024-06-21 20:03:05,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:05,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:03:05,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:03:05,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:03:05,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 20:03:05,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 337 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) [2024-06-21 20:03:05,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:05,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 20:03:05,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:05,843 INFO L124 PetriNetUnfolderBase]: 801/1435 cut-off events. [2024-06-21 20:03:05,843 INFO L125 PetriNetUnfolderBase]: For 2705/2739 co-relation queries the response was YES. [2024-06-21 20:03:05,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 1435 events. 801/1435 cut-off events. For 2705/2739 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7864 event pairs, 231 based on Foata normal form. 4/1396 useless extension candidates. Maximal degree in co-relation 4794. Up to 1191 conditions per place. [2024-06-21 20:03:05,852 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 46 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-06-21 20:03:05,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 505 flow [2024-06-21 20:03:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 20:03:05,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:03:05,854 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 337 flow. Second operand 4 states and 104 transitions. [2024-06-21 20:03:05,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 505 flow [2024-06-21 20:03:05,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 454 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:05,858 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 352 flow [2024-06-21 20:03:05,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2024-06-21 20:03:05,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 20:03:05,859 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 352 flow [2024-06-21 20:03:05,859 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) [2024-06-21 20:03:05,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:05,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:05,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:03:05,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:05,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash 703353189, now seen corresponding path program 1 times [2024-06-21 20:03:05,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:05,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366375437] [2024-06-21 20:03:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:05,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366375437] [2024-06-21 20:03:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366375437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119802775] [2024-06-21 20:03:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:05,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:05,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:05,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 352 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) [2024-06-21 20:03:05,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:05,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:05,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:06,089 INFO L124 PetriNetUnfolderBase]: 1050/1746 cut-off events. [2024-06-21 20:03:06,089 INFO L125 PetriNetUnfolderBase]: For 3995/3995 co-relation queries the response was YES. [2024-06-21 20:03:06,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1746 events. 1050/1746 cut-off events. For 3995/3995 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9025 event pairs, 307 based on Foata normal form. 6/1746 useless extension candidates. Maximal degree in co-relation 6073. Up to 1463 conditions per place. [2024-06-21 20:03:06,101 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 24 changer transitions 0/85 dead transitions. [2024-06-21 20:03:06,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 635 flow [2024-06-21 20:03:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 20:03:06,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-21 20:03:06,102 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 352 flow. Second operand 5 states and 132 transitions. [2024-06-21 20:03:06,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 635 flow [2024-06-21 20:03:06,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 602 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:06,106 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 434 flow [2024-06-21 20:03:06,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2024-06-21 20:03:06,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-21 20:03:06,107 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 434 flow [2024-06-21 20:03:06,107 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) [2024-06-21 20:03:06,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:06,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:06,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:03:06,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:06,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1439788116, now seen corresponding path program 1 times [2024-06-21 20:03:06,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:06,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164834959] [2024-06-21 20:03:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:06,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:06,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164834959] [2024-06-21 20:03:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164834959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:06,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181788351] [2024-06-21 20:03:06,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:06,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:06,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 434 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) [2024-06-21 20:03:06,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:06,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:06,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:06,382 INFO L124 PetriNetUnfolderBase]: 1053/1743 cut-off events. [2024-06-21 20:03:06,382 INFO L125 PetriNetUnfolderBase]: For 4867/4867 co-relation queries the response was YES. [2024-06-21 20:03:06,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6522 conditions, 1743 events. 1053/1743 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8960 event pairs, 333 based on Foata normal form. 4/1739 useless extension candidates. Maximal degree in co-relation 6496. Up to 1457 conditions per place. [2024-06-21 20:03:06,394 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 58 selfloop transitions, 26 changer transitions 0/91 dead transitions. [2024-06-21 20:03:06,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 735 flow [2024-06-21 20:03:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:06,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:03:06,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-06-21 20:03:06,396 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 434 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:03:06,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 735 flow [2024-06-21 20:03:06,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 702 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:06,402 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 496 flow [2024-06-21 20:03:06,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2024-06-21 20:03:06,402 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-21 20:03:06,403 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 496 flow [2024-06-21 20:03:06,403 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) [2024-06-21 20:03:06,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:06,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:06,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:03:06,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:06,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 255447820, now seen corresponding path program 2 times [2024-06-21 20:03:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:06,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417889899] [2024-06-21 20:03:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:06,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:06,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417889899] [2024-06-21 20:03:06,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417889899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:06,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:06,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:06,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251939844] [2024-06-21 20:03:06,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:06,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:06,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:06,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:06,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:06,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 496 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) [2024-06-21 20:03:06,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:06,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:06,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:06,666 INFO L124 PetriNetUnfolderBase]: 1018/1668 cut-off events. [2024-06-21 20:03:06,666 INFO L125 PetriNetUnfolderBase]: For 5967/5967 co-relation queries the response was YES. [2024-06-21 20:03:06,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6404 conditions, 1668 events. 1018/1668 cut-off events. For 5967/5967 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8366 event pairs, 335 based on Foata normal form. 4/1665 useless extension candidates. Maximal degree in co-relation 6376. Up to 1406 conditions per place. [2024-06-21 20:03:06,682 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 26 changer transitions 0/86 dead transitions. [2024-06-21 20:03:06,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 724 flow [2024-06-21 20:03:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 20:03:06,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-21 20:03:06,685 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 496 flow. Second operand 5 states and 129 transitions. [2024-06-21 20:03:06,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 724 flow [2024-06-21 20:03:06,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 688 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:06,692 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 522 flow [2024-06-21 20:03:06,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=522, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-21 20:03:06,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-21 20:03:06,694 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 522 flow [2024-06-21 20:03:06,694 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) [2024-06-21 20:03:06,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:06,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:06,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:03:06,695 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:06,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1612568420, now seen corresponding path program 1 times [2024-06-21 20:03:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:06,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829439533] [2024-06-21 20:03:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:06,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:06,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:06,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829439533] [2024-06-21 20:03:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829439533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:06,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:06,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977061334] [2024-06-21 20:03:06,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:06,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:06,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:06,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 522 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) [2024-06-21 20:03:06,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:06,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:07,051 INFO L124 PetriNetUnfolderBase]: 1085/1783 cut-off events. [2024-06-21 20:03:07,051 INFO L125 PetriNetUnfolderBase]: For 7650/7650 co-relation queries the response was YES. [2024-06-21 20:03:07,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6860 conditions, 1783 events. 1085/1783 cut-off events. For 7650/7650 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9130 event pairs, 299 based on Foata normal form. 24/1800 useless extension candidates. Maximal degree in co-relation 6831. Up to 1391 conditions per place. [2024-06-21 20:03:07,066 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 30 changer transitions 0/97 dead transitions. [2024-06-21 20:03:07,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 97 transitions, 820 flow [2024-06-21 20:03:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:03:07,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 20:03:07,069 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 522 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:03:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 97 transitions, 820 flow [2024-06-21 20:03:07,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 97 transitions, 758 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:07,083 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 557 flow [2024-06-21 20:03:07,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=557, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 20:03:07,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-21 20:03:07,084 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 557 flow [2024-06-21 20:03:07,084 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) [2024-06-21 20:03:07,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:07,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:07,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:03:07,085 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:07,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007728, now seen corresponding path program 1 times [2024-06-21 20:03:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882742568] [2024-06-21 20:03:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:07,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882742568] [2024-06-21 20:03:07,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882742568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:07,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:07,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:07,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84331702] [2024-06-21 20:03:07,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:07,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:07,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:07,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:07,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 557 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:07,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:07,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:07,390 INFO L124 PetriNetUnfolderBase]: 1096/1818 cut-off events. [2024-06-21 20:03:07,390 INFO L125 PetriNetUnfolderBase]: For 8490/8493 co-relation queries the response was YES. [2024-06-21 20:03:07,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 1818 events. 1096/1818 cut-off events. For 8490/8493 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9533 event pairs, 358 based on Foata normal form. 4/1813 useless extension candidates. Maximal degree in co-relation 7274. Up to 1531 conditions per place. [2024-06-21 20:03:07,402 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 59 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-21 20:03:07,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 831 flow [2024-06-21 20:03:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:03:07,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 20:03:07,403 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 557 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:03:07,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 831 flow [2024-06-21 20:03:07,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 756 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:07,415 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 568 flow [2024-06-21 20:03:07,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=568, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-21 20:03:07,416 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-21 20:03:07,416 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 568 flow [2024-06-21 20:03:07,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:07,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:07,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:03:07,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:07,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1572995888, now seen corresponding path program 2 times [2024-06-21 20:03:07,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:07,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536457635] [2024-06-21 20:03:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536457635] [2024-06-21 20:03:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536457635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:07,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:07,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295057181] [2024-06-21 20:03:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:07,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:07,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 568 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:07,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:07,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:07,687 INFO L124 PetriNetUnfolderBase]: 1091/1802 cut-off events. [2024-06-21 20:03:07,687 INFO L125 PetriNetUnfolderBase]: For 9379/9386 co-relation queries the response was YES. [2024-06-21 20:03:07,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7247 conditions, 1802 events. 1091/1802 cut-off events. For 9379/9386 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9350 event pairs, 350 based on Foata normal form. 8/1802 useless extension candidates. Maximal degree in co-relation 7216. Up to 1526 conditions per place. [2024-06-21 20:03:07,698 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-21 20:03:07,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 786 flow [2024-06-21 20:03:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 20:03:07,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-21 20:03:07,700 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 568 flow. Second operand 5 states and 128 transitions. [2024-06-21 20:03:07,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 786 flow [2024-06-21 20:03:07,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 740 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:07,709 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 582 flow [2024-06-21 20:03:07,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 20:03:07,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-21 20:03:07,710 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 582 flow [2024-06-21 20:03:07,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:07,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:03:07,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:07,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1228387191, now seen corresponding path program 1 times [2024-06-21 20:03:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:07,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438108393] [2024-06-21 20:03:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:07,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438108393] [2024-06-21 20:03:07,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438108393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:07,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:07,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:07,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097541100] [2024-06-21 20:03:07,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:07,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:07,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:07,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:07,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:07,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:07,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:07,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:07,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:08,152 INFO L124 PetriNetUnfolderBase]: 1194/1960 cut-off events. [2024-06-21 20:03:08,152 INFO L125 PetriNetUnfolderBase]: For 11861/11861 co-relation queries the response was YES. [2024-06-21 20:03:08,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8103 conditions, 1960 events. 1194/1960 cut-off events. For 11861/11861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10256 event pairs, 259 based on Foata normal form. 4/1954 useless extension candidates. Maximal degree in co-relation 8072. Up to 1385 conditions per place. [2024-06-21 20:03:08,180 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 33 changer transitions 0/109 dead transitions. [2024-06-21 20:03:08,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-21 20:03:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:03:08,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-21 20:03:08,193 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 582 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:03:08,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-21 20:03:08,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 872 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:08,225 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 617 flow [2024-06-21 20:03:08,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 20:03:08,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-21 20:03:08,226 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 617 flow [2024-06-21 20:03:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:08,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:08,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:03:08,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:08,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1937222135, now seen corresponding path program 2 times [2024-06-21 20:03:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:08,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464564891] [2024-06-21 20:03:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:08,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:08,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464564891] [2024-06-21 20:03:08,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464564891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:08,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:08,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570710042] [2024-06-21 20:03:08,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:08,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:08,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 617 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:08,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:08,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:08,540 INFO L124 PetriNetUnfolderBase]: 1186/1953 cut-off events. [2024-06-21 20:03:08,541 INFO L125 PetriNetUnfolderBase]: For 13181/13181 co-relation queries the response was YES. [2024-06-21 20:03:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8304 conditions, 1953 events. 1186/1953 cut-off events. For 13181/13181 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10294 event pairs, 343 based on Foata normal form. 4/1947 useless extension candidates. Maximal degree in co-relation 8273. Up to 1665 conditions per place. [2024-06-21 20:03:08,554 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 31 changer transitions 0/103 dead transitions. [2024-06-21 20:03:08,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 877 flow [2024-06-21 20:03:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:08,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:03:08,556 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 617 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:08,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 877 flow [2024-06-21 20:03:08,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 831 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:08,573 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 652 flow [2024-06-21 20:03:08,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=652, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-21 20:03:08,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 20:03:08,574 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 652 flow [2024-06-21 20:03:08,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:08,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:08,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:03:08,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:08,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1246913772, now seen corresponding path program 1 times [2024-06-21 20:03:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:08,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609321392] [2024-06-21 20:03:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609321392] [2024-06-21 20:03:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609321392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:08,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621481271] [2024-06-21 20:03:08,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:08,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:08,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:08,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:08,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:08,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 652 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:08,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:08,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:08,847 INFO L124 PetriNetUnfolderBase]: 1191/1979 cut-off events. [2024-06-21 20:03:08,847 INFO L125 PetriNetUnfolderBase]: For 14374/14374 co-relation queries the response was YES. [2024-06-21 20:03:08,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8605 conditions, 1979 events. 1191/1979 cut-off events. For 14374/14374 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10511 event pairs, 324 based on Foata normal form. 1/1979 useless extension candidates. Maximal degree in co-relation 8572. Up to 1813 conditions per place. [2024-06-21 20:03:08,859 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-06-21 20:03:08,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 974 flow [2024-06-21 20:03:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 20:03:08,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 20:03:08,860 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 652 flow. Second operand 5 states and 121 transitions. [2024-06-21 20:03:08,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 974 flow [2024-06-21 20:03:08,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 901 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:08,876 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 691 flow [2024-06-21 20:03:08,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=691, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2024-06-21 20:03:08,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 20:03:08,877 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 691 flow [2024-06-21 20:03:08,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:08,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:08,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:03:08,878 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:08,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash -813502781, now seen corresponding path program 1 times [2024-06-21 20:03:08,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:08,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677258643] [2024-06-21 20:03:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:08,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:08,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:08,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677258643] [2024-06-21 20:03:08,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677258643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:08,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:08,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:08,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740110215] [2024-06-21 20:03:08,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:08,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:08,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:08,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:08,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:08,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 691 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:08,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:08,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:09,184 INFO L124 PetriNetUnfolderBase]: 1183/1942 cut-off events. [2024-06-21 20:03:09,184 INFO L125 PetriNetUnfolderBase]: For 16315/16315 co-relation queries the response was YES. [2024-06-21 20:03:09,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 1942 events. 1183/1942 cut-off events. For 16315/16315 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10162 event pairs, 337 based on Foata normal form. 4/1939 useless extension candidates. Maximal degree in co-relation 8618. Up to 1660 conditions per place. [2024-06-21 20:03:09,195 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 73 selfloop transitions, 31 changer transitions 0/111 dead transitions. [2024-06-21 20:03:09,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 973 flow [2024-06-21 20:03:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:03:09,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:03:09,196 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 691 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:03:09,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 973 flow [2024-06-21 20:03:09,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 953 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:09,215 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 768 flow [2024-06-21 20:03:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=768, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2024-06-21 20:03:09,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-21 20:03:09,216 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 768 flow [2024-06-21 20:03:09,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:03:09,217 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:09,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1134391939, now seen corresponding path program 2 times [2024-06-21 20:03:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367941289] [2024-06-21 20:03:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:09,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:09,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367941289] [2024-06-21 20:03:09,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367941289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:09,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:09,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689564575] [2024-06-21 20:03:09,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:09,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:09,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:09,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:09,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:09,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:09,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 768 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:09,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:09,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:09,562 INFO L124 PetriNetUnfolderBase]: 1236/2048 cut-off events. [2024-06-21 20:03:09,563 INFO L125 PetriNetUnfolderBase]: For 19721/19721 co-relation queries the response was YES. [2024-06-21 20:03:09,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9413 conditions, 2048 events. 1236/2048 cut-off events. For 19721/19721 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10939 event pairs, 307 based on Foata normal form. 4/2045 useless extension candidates. Maximal degree in co-relation 9375. Up to 1487 conditions per place. [2024-06-21 20:03:09,575 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-06-21 20:03:09,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1152 flow [2024-06-21 20:03:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:03:09,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 20:03:09,577 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 768 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:03:09,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1152 flow [2024-06-21 20:03:09,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 1075 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:09,598 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 806 flow [2024-06-21 20:03:09,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=806, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-21 20:03:09,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-21 20:03:09,599 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 806 flow [2024-06-21 20:03:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:09,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:03:09,600 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:09,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1246585482, now seen corresponding path program 2 times [2024-06-21 20:03:09,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:09,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695882565] [2024-06-21 20:03:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:09,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:09,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695882565] [2024-06-21 20:03:09,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695882565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:09,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:09,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:09,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377470509] [2024-06-21 20:03:09,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:09,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:09,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:09,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:09,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 806 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:09,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:09,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:09,903 INFO L124 PetriNetUnfolderBase]: 1238/2061 cut-off events. [2024-06-21 20:03:09,903 INFO L125 PetriNetUnfolderBase]: For 21687/21687 co-relation queries the response was YES. [2024-06-21 20:03:09,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9666 conditions, 2061 events. 1238/2061 cut-off events. For 21687/21687 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11052 event pairs, 341 based on Foata normal form. 2/2062 useless extension candidates. Maximal degree in co-relation 9627. Up to 1893 conditions per place. [2024-06-21 20:03:09,917 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 87 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-21 20:03:09,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1084 flow [2024-06-21 20:03:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 20:03:09,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:03:09,918 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 806 flow. Second operand 4 states and 104 transitions. [2024-06-21 20:03:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1084 flow [2024-06-21 20:03:09,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 1022 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:09,942 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 832 flow [2024-06-21 20:03:09,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=832, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-21 20:03:09,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 20:03:09,942 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 832 flow [2024-06-21 20:03:09,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:09,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:09,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:03:09,943 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:09,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash -632660391, now seen corresponding path program 1 times [2024-06-21 20:03:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908802227] [2024-06-21 20:03:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:10,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908802227] [2024-06-21 20:03:10,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908802227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:10,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:10,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283068628] [2024-06-21 20:03:10,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:10,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:10,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 832 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:10,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:10,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:10,308 INFO L124 PetriNetUnfolderBase]: 1279/2130 cut-off events. [2024-06-21 20:03:10,309 INFO L125 PetriNetUnfolderBase]: For 25618/25618 co-relation queries the response was YES. [2024-06-21 20:03:10,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10138 conditions, 2130 events. 1279/2130 cut-off events. For 25618/25618 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11644 event pairs, 286 based on Foata normal form. 12/2132 useless extension candidates. Maximal degree in co-relation 10097. Up to 1066 conditions per place. [2024-06-21 20:03:10,323 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 84 selfloop transitions, 32 changer transitions 0/123 dead transitions. [2024-06-21 20:03:10,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 1174 flow [2024-06-21 20:03:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:03:10,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:03:10,325 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 832 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:03:10,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 1174 flow [2024-06-21 20:03:10,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 123 transitions, 1134 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:10,349 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 874 flow [2024-06-21 20:03:10,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2024-06-21 20:03:10,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 20:03:10,350 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 874 flow [2024-06-21 20:03:10,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:10,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:03:10,350 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:10,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1721396175, now seen corresponding path program 2 times [2024-06-21 20:03:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:10,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903005266] [2024-06-21 20:03:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:10,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:10,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903005266] [2024-06-21 20:03:10,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903005266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:10,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:10,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:10,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353285662] [2024-06-21 20:03:10,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:10,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:10,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:10,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 98 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:10,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:10,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:10,707 INFO L124 PetriNetUnfolderBase]: 1259/2094 cut-off events. [2024-06-21 20:03:10,707 INFO L125 PetriNetUnfolderBase]: For 26149/26149 co-relation queries the response was YES. [2024-06-21 20:03:10,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10177 conditions, 2094 events. 1259/2094 cut-off events. For 26149/26149 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11304 event pairs, 292 based on Foata normal form. 12/2099 useless extension candidates. Maximal degree in co-relation 10135. Up to 1555 conditions per place. [2024-06-21 20:03:10,719 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 82 selfloop transitions, 35 changer transitions 0/124 dead transitions. [2024-06-21 20:03:10,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 124 transitions, 1176 flow [2024-06-21 20:03:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:03:10,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:03:10,721 INFO L175 Difference]: Start difference. First operand has 94 places, 98 transitions, 874 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:03:10,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 124 transitions, 1176 flow [2024-06-21 20:03:10,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 124 transitions, 1123 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:10,745 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 897 flow [2024-06-21 20:03:10,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=897, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2024-06-21 20:03:10,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-21 20:03:10,746 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 897 flow [2024-06-21 20:03:10,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:10,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:10,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:03:10,747 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:10,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:10,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1176641722, now seen corresponding path program 1 times [2024-06-21 20:03:10,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:10,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732253893] [2024-06-21 20:03:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:10,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:10,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732253893] [2024-06-21 20:03:10,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732253893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:10,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:10,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:10,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504016432] [2024-06-21 20:03:10,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:10,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:10,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:10,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:10,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:10,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:10,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 897 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) [2024-06-21 20:03:10,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:10,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:10,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:11,069 INFO L124 PetriNetUnfolderBase]: 1298/2171 cut-off events. [2024-06-21 20:03:11,069 INFO L125 PetriNetUnfolderBase]: For 28287/28287 co-relation queries the response was YES. [2024-06-21 20:03:11,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 2171 events. 1298/2171 cut-off events. For 28287/28287 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11933 event pairs, 357 based on Foata normal form. 3/2164 useless extension candidates. Maximal degree in co-relation 10550. Up to 1766 conditions per place. [2024-06-21 20:03:11,085 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 90 selfloop transitions, 48 changer transitions 0/145 dead transitions. [2024-06-21 20:03:11,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 145 transitions, 1519 flow [2024-06-21 20:03:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:03:11,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-21 20:03:11,086 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 897 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:03:11,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 145 transitions, 1519 flow [2024-06-21 20:03:11,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 145 transitions, 1436 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:11,115 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 1128 flow [2024-06-21 20:03:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1128, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2024-06-21 20:03:11,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-21 20:03:11,116 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 1128 flow [2024-06-21 20:03:11,116 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) [2024-06-21 20:03:11,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:11,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:11,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:03:11,117 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:11,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 413521959, now seen corresponding path program 3 times [2024-06-21 20:03:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:11,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440333650] [2024-06-21 20:03:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:11,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:11,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:11,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440333650] [2024-06-21 20:03:11,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440333650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:11,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:11,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:11,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434788824] [2024-06-21 20:03:11,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:11,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:11,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:11,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 1128 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:11,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:11,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:11,472 INFO L124 PetriNetUnfolderBase]: 1400/2369 cut-off events. [2024-06-21 20:03:11,472 INFO L125 PetriNetUnfolderBase]: For 36322/36333 co-relation queries the response was YES. [2024-06-21 20:03:11,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12151 conditions, 2369 events. 1400/2369 cut-off events. For 36322/36333 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13422 event pairs, 318 based on Foata normal form. 22/2383 useless extension candidates. Maximal degree in co-relation 12105. Up to 1692 conditions per place. [2024-06-21 20:03:11,490 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-21 20:03:11,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 151 transitions, 1602 flow [2024-06-21 20:03:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:03:11,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:03:11,492 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 1128 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:03:11,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 151 transitions, 1602 flow [2024-06-21 20:03:11,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1564 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:11,529 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1184 flow [2024-06-21 20:03:11,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1184, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-21 20:03:11,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-21 20:03:11,530 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1184 flow [2024-06-21 20:03:11,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:11,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:11,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:03:11,530 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:11,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash -179426513, now seen corresponding path program 4 times [2024-06-21 20:03:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:11,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338076994] [2024-06-21 20:03:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:11,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:11,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338076994] [2024-06-21 20:03:11,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338076994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:11,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:11,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328639545] [2024-06-21 20:03:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:11,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:11,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:11,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:11,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1184 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:11,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:11,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:11,920 INFO L124 PetriNetUnfolderBase]: 1458/2467 cut-off events. [2024-06-21 20:03:11,920 INFO L125 PetriNetUnfolderBase]: For 41061/41072 co-relation queries the response was YES. [2024-06-21 20:03:11,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12788 conditions, 2467 events. 1458/2467 cut-off events. For 41061/41072 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14168 event pairs, 423 based on Foata normal form. 26/2485 useless extension candidates. Maximal degree in co-relation 12739. Up to 2045 conditions per place. [2024-06-21 20:03:11,938 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 113 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 20:03:11,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1551 flow [2024-06-21 20:03:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:11,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:03:11,940 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1184 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:11,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1551 flow [2024-06-21 20:03:11,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1509 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:11,979 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 1220 flow [2024-06-21 20:03:11,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1220, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2024-06-21 20:03:11,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 20:03:11,980 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 1220 flow [2024-06-21 20:03:11,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:11,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:11,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:03:11,981 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:11,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:11,981 INFO L85 PathProgramCache]: Analyzing trace with hash -174064133, now seen corresponding path program 5 times [2024-06-21 20:03:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:11,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019096370] [2024-06-21 20:03:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:12,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019096370] [2024-06-21 20:03:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019096370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:12,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077955811] [2024-06-21 20:03:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:12,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:12,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:12,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:12,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 1220 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:12,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:12,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:12,393 INFO L124 PetriNetUnfolderBase]: 1430/2422 cut-off events. [2024-06-21 20:03:12,394 INFO L125 PetriNetUnfolderBase]: For 40573/40576 co-relation queries the response was YES. [2024-06-21 20:03:12,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 2422 events. 1430/2422 cut-off events. For 40573/40576 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13841 event pairs, 410 based on Foata normal form. 18/2431 useless extension candidates. Maximal degree in co-relation 12472. Up to 2001 conditions per place. [2024-06-21 20:03:12,413 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-21 20:03:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 144 transitions, 1558 flow [2024-06-21 20:03:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:03:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:03:12,416 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 1220 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:03:12,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 144 transitions, 1558 flow [2024-06-21 20:03:12,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 144 transitions, 1499 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:12,465 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1222 flow [2024-06-21 20:03:12,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1222, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-21 20:03:12,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 20:03:12,466 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1222 flow [2024-06-21 20:03:12,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:12,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:12,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:03:12,467 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:12,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash -173848931, now seen corresponding path program 1 times [2024-06-21 20:03:12,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:12,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237115011] [2024-06-21 20:03:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:12,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237115011] [2024-06-21 20:03:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237115011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:12,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:12,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432285930] [2024-06-21 20:03:12,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:12,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:12,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:12,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1222 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:12,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:12,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:12,878 INFO L124 PetriNetUnfolderBase]: 1471/2503 cut-off events. [2024-06-21 20:03:12,878 INFO L125 PetriNetUnfolderBase]: For 42662/42665 co-relation queries the response was YES. [2024-06-21 20:03:12,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12861 conditions, 2503 events. 1471/2503 cut-off events. For 42662/42665 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14512 event pairs, 348 based on Foata normal form. 14/2508 useless extension candidates. Maximal degree in co-relation 12809. Up to 1783 conditions per place. [2024-06-21 20:03:12,900 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-21 20:03:12,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 1593 flow [2024-06-21 20:03:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:12,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:03:12,901 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1222 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:12,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 1593 flow [2024-06-21 20:03:12,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 148 transitions, 1525 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:12,948 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1239 flow [2024-06-21 20:03:12,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1239, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-21 20:03:12,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-21 20:03:12,949 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1239 flow [2024-06-21 20:03:12,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:12,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:12,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:03:12,950 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:12,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:12,950 INFO L85 PathProgramCache]: Analyzing trace with hash 979984476, now seen corresponding path program 2 times [2024-06-21 20:03:12,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:12,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946975494] [2024-06-21 20:03:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:12,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946975494] [2024-06-21 20:03:13,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946975494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:13,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693170422] [2024-06-21 20:03:13,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:13,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:13,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:13,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1239 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) [2024-06-21 20:03:13,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:13,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:13,340 INFO L124 PetriNetUnfolderBase]: 1514/2558 cut-off events. [2024-06-21 20:03:13,341 INFO L125 PetriNetUnfolderBase]: For 43664/43664 co-relation queries the response was YES. [2024-06-21 20:03:13,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13391 conditions, 2558 events. 1514/2558 cut-off events. For 43664/43664 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14820 event pairs, 408 based on Foata normal form. 3/2551 useless extension candidates. Maximal degree in co-relation 13338. Up to 2099 conditions per place. [2024-06-21 20:03:13,358 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 93 selfloop transitions, 53 changer transitions 0/153 dead transitions. [2024-06-21 20:03:13,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 153 transitions, 1849 flow [2024-06-21 20:03:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:03:13,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:03:13,359 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1239 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:03:13,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 153 transitions, 1849 flow [2024-06-21 20:03:13,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 153 transitions, 1779 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:13,420 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 1406 flow [2024-06-21 20:03:13,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2024-06-21 20:03:13,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 20:03:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 1406 flow [2024-06-21 20:03:13,421 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) [2024-06-21 20:03:13,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:13,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:13,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:03:13,422 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:13,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 379698, now seen corresponding path program 1 times [2024-06-21 20:03:13,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:13,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260580101] [2024-06-21 20:03:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:13,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260580101] [2024-06-21 20:03:13,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260580101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:13,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340077854] [2024-06-21 20:03:13,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:13,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:13,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:13,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:13,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 1406 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) [2024-06-21 20:03:13,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:13,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:13,760 INFO L124 PetriNetUnfolderBase]: 1519/2576 cut-off events. [2024-06-21 20:03:13,760 INFO L125 PetriNetUnfolderBase]: For 45748/45748 co-relation queries the response was YES. [2024-06-21 20:03:13,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13655 conditions, 2576 events. 1519/2576 cut-off events. For 45748/45748 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14918 event pairs, 386 based on Foata normal form. 1/2576 useless extension candidates. Maximal degree in co-relation 13600. Up to 2342 conditions per place. [2024-06-21 20:03:13,783 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 123 selfloop transitions, 25 changer transitions 0/155 dead transitions. [2024-06-21 20:03:13,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 155 transitions, 1882 flow [2024-06-21 20:03:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:03:13,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:13,785 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 1406 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:03:13,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 155 transitions, 1882 flow [2024-06-21 20:03:13,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 155 transitions, 1793 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:13,853 INFO L231 Difference]: Finished difference. Result has 120 places, 138 transitions, 1467 flow [2024-06-21 20:03:13,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1467, PETRI_PLACES=120, PETRI_TRANSITIONS=138} [2024-06-21 20:03:13,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 20:03:13,854 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 138 transitions, 1467 flow [2024-06-21 20:03:13,854 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) [2024-06-21 20:03:13,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:13,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:13,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:03:13,854 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:13,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash 807718459, now seen corresponding path program 2 times [2024-06-21 20:03:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:13,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497847416] [2024-06-21 20:03:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:13,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497847416] [2024-06-21 20:03:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497847416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:13,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235222969] [2024-06-21 20:03:13,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:13,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:13,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:13,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 138 transitions, 1467 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:13,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:14,267 INFO L124 PetriNetUnfolderBase]: 1499/2535 cut-off events. [2024-06-21 20:03:14,268 INFO L125 PetriNetUnfolderBase]: For 48842/48842 co-relation queries the response was YES. [2024-06-21 20:03:14,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13324 conditions, 2535 events. 1499/2535 cut-off events. For 48842/48842 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14578 event pairs, 274 based on Foata normal form. 12/2537 useless extension candidates. Maximal degree in co-relation 13268. Up to 1931 conditions per place. [2024-06-21 20:03:14,286 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 125 selfloop transitions, 35 changer transitions 0/167 dead transitions. [2024-06-21 20:03:14,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1869 flow [2024-06-21 20:03:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:03:14,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:03:14,287 INFO L175 Difference]: Start difference. First operand has 120 places, 138 transitions, 1467 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:03:14,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1869 flow [2024-06-21 20:03:14,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 167 transitions, 1817 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:14,359 INFO L231 Difference]: Finished difference. Result has 124 places, 138 transitions, 1491 flow [2024-06-21 20:03:14,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1491, PETRI_PLACES=124, PETRI_TRANSITIONS=138} [2024-06-21 20:03:14,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 20:03:14,360 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 138 transitions, 1491 flow [2024-06-21 20:03:14,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:14,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:14,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:03:14,360 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:14,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:14,361 INFO L85 PathProgramCache]: Analyzing trace with hash -377706113, now seen corresponding path program 3 times [2024-06-21 20:03:14,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:14,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538019137] [2024-06-21 20:03:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:14,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538019137] [2024-06-21 20:03:14,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538019137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357046507] [2024-06-21 20:03:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:14,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:14,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:14,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 138 transitions, 1491 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:14,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:14,704 INFO L124 PetriNetUnfolderBase]: 1479/2514 cut-off events. [2024-06-21 20:03:14,704 INFO L125 PetriNetUnfolderBase]: For 49649/49649 co-relation queries the response was YES. [2024-06-21 20:03:14,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13231 conditions, 2514 events. 1479/2514 cut-off events. For 49649/49649 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14564 event pairs, 254 based on Foata normal form. 12/2516 useless extension candidates. Maximal degree in co-relation 13173. Up to 1219 conditions per place. [2024-06-21 20:03:14,722 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 118 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-21 20:03:14,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 161 transitions, 1821 flow [2024-06-21 20:03:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:03:14,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:03:14,724 INFO L175 Difference]: Start difference. First operand has 124 places, 138 transitions, 1491 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:03:14,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 161 transitions, 1821 flow [2024-06-21 20:03:14,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 161 transitions, 1720 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:14,784 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 1420 flow [2024-06-21 20:03:14,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1420, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2024-06-21 20:03:14,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 20:03:14,785 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 1420 flow [2024-06-21 20:03:14,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:14,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:14,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:03:14,786 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:14,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash -909435510, now seen corresponding path program 2 times [2024-06-21 20:03:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:14,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957763183] [2024-06-21 20:03:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:14,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957763183] [2024-06-21 20:03:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957763183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:14,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736487544] [2024-06-21 20:03:14,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:14,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:14,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:14,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 1420 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) [2024-06-21 20:03:14,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:14,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,153 INFO L124 PetriNetUnfolderBase]: 1476/2508 cut-off events. [2024-06-21 20:03:15,153 INFO L125 PetriNetUnfolderBase]: For 44157/44157 co-relation queries the response was YES. [2024-06-21 20:03:15,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13073 conditions, 2508 events. 1476/2508 cut-off events. For 44157/44157 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14540 event pairs, 358 based on Foata normal form. 1/2508 useless extension candidates. Maximal degree in co-relation 13014. Up to 2281 conditions per place. [2024-06-21 20:03:15,176 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 20 changer transitions 0/152 dead transitions. [2024-06-21 20:03:15,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 152 transitions, 1748 flow [2024-06-21 20:03:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 20:03:15,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 20:03:15,177 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 1420 flow. Second operand 5 states and 121 transitions. [2024-06-21 20:03:15,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 152 transitions, 1748 flow [2024-06-21 20:03:15,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1578 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:15,240 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1296 flow [2024-06-21 20:03:15,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1296, PETRI_PLACES=122, PETRI_TRANSITIONS=137} [2024-06-21 20:03:15,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 20:03:15,241 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1296 flow [2024-06-21 20:03:15,241 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) [2024-06-21 20:03:15,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:03:15,242 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:15,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1347882524, now seen corresponding path program 3 times [2024-06-21 20:03:15,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338479687] [2024-06-21 20:03:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:15,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338479687] [2024-06-21 20:03:15,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338479687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:15,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:15,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620735195] [2024-06-21 20:03:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:15,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:15,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:15,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 137 transitions, 1296 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) [2024-06-21 20:03:15,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:15,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:15,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,634 INFO L124 PetriNetUnfolderBase]: 1578/2676 cut-off events. [2024-06-21 20:03:15,634 INFO L125 PetriNetUnfolderBase]: For 50495/50498 co-relation queries the response was YES. [2024-06-21 20:03:15,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13519 conditions, 2676 events. 1578/2676 cut-off events. For 50495/50498 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15696 event pairs, 362 based on Foata normal form. 8/2682 useless extension candidates. Maximal degree in co-relation 13461. Up to 2191 conditions per place. [2024-06-21 20:03:15,653 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 115 selfloop transitions, 68 changer transitions 0/190 dead transitions. [2024-06-21 20:03:15,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 190 transitions, 2101 flow [2024-06-21 20:03:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 20:03:15,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-21 20:03:15,654 INFO L175 Difference]: Start difference. First operand has 122 places, 137 transitions, 1296 flow. Second operand 6 states and 162 transitions. [2024-06-21 20:03:15,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 190 transitions, 2101 flow [2024-06-21 20:03:15,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 190 transitions, 2035 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:15,724 INFO L231 Difference]: Finished difference. Result has 126 places, 161 transitions, 1719 flow [2024-06-21 20:03:15,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=126, PETRI_TRANSITIONS=161} [2024-06-21 20:03:15,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 20:03:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 161 transitions, 1719 flow [2024-06-21 20:03:15,725 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) [2024-06-21 20:03:15,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:03:15,725 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)] === [2024-06-21 20:03:15,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1179730858, now seen corresponding path program 1 times [2024-06-21 20:03:15,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504672003] [2024-06-21 20:03:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:15,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:15,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504672003] [2024-06-21 20:03:15,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504672003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:15,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:15,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:15,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558753521] [2024-06-21 20:03:15,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:15,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:15,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:15,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:15,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:15,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 161 transitions, 1719 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) [2024-06-21 20:03:15,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:15,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:15,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:16,134 INFO L124 PetriNetUnfolderBase]: 1601/2701 cut-off events. [2024-06-21 20:03:16,134 INFO L125 PetriNetUnfolderBase]: For 56967/56967 co-relation queries the response was YES. [2024-06-21 20:03:16,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14960 conditions, 2701 events. 1601/2701 cut-off events. For 56967/56967 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15830 event pairs, 395 based on Foata normal form. 3/2697 useless extension candidates. Maximal degree in co-relation 14899. Up to 2191 conditions per place. [2024-06-21 20:03:16,156 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 77 changer transitions 0/193 dead transitions. [2024-06-21 20:03:16,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 193 transitions, 2457 flow [2024-06-21 20:03:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:03:16,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:03:16,157 INFO L175 Difference]: Start difference. First operand has 126 places, 161 transitions, 1719 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:03:16,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 193 transitions, 2457 flow [2024-06-21 20:03:16,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 193 transitions, 2407 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:16,245 INFO L231 Difference]: Finished difference. Result has 132 places, 174 transitions, 2015 flow [2024-06-21 20:03:16,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2015, PETRI_PLACES=132, PETRI_TRANSITIONS=174} [2024-06-21 20:03:16,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-21 20:03:16,246 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 174 transitions, 2015 flow [2024-06-21 20:03:16,246 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) [2024-06-21 20:03:16,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:16,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:16,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:03:16,247 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)] === [2024-06-21 20:03:16,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1147698722, now seen corresponding path program 2 times [2024-06-21 20:03:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561720661] [2024-06-21 20:03:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561720661] [2024-06-21 20:03:16,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561720661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:16,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452740633] [2024-06-21 20:03:16,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:16,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:16,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:16,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 2015 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) [2024-06-21 20:03:16,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:16,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:16,705 INFO L124 PetriNetUnfolderBase]: 1667/2816 cut-off events. [2024-06-21 20:03:16,705 INFO L125 PetriNetUnfolderBase]: For 63471/63471 co-relation queries the response was YES. [2024-06-21 20:03:16,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16449 conditions, 2816 events. 1667/2816 cut-off events. For 63471/63471 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16618 event pairs, 359 based on Foata normal form. 4/2819 useless extension candidates. Maximal degree in co-relation 16385. Up to 2518 conditions per place. [2024-06-21 20:03:16,729 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 167 selfloop transitions, 37 changer transitions 0/211 dead transitions. [2024-06-21 20:03:16,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 211 transitions, 2850 flow [2024-06-21 20:03:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 20:03:16,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:03:16,730 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 2015 flow. Second operand 7 states and 160 transitions. [2024-06-21 20:03:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 211 transitions, 2850 flow [2024-06-21 20:03:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 211 transitions, 2754 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:16,832 INFO L231 Difference]: Finished difference. Result has 140 places, 195 transitions, 2374 flow [2024-06-21 20:03:16,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2374, PETRI_PLACES=140, PETRI_TRANSITIONS=195} [2024-06-21 20:03:16,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 20:03:16,833 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 195 transitions, 2374 flow [2024-06-21 20:03:16,833 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) [2024-06-21 20:03:16,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:16,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:16,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:03:16,833 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:16,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1348067222, now seen corresponding path program 3 times [2024-06-21 20:03:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:16,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053156514] [2024-06-21 20:03:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:16,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053156514] [2024-06-21 20:03:16,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053156514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:16,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735661794] [2024-06-21 20:03:16,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:16,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:16,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:16,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 195 transitions, 2374 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) [2024-06-21 20:03:16,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:16,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,298 INFO L124 PetriNetUnfolderBase]: 1665/2822 cut-off events. [2024-06-21 20:03:17,299 INFO L125 PetriNetUnfolderBase]: For 66488/66488 co-relation queries the response was YES. [2024-06-21 20:03:17,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16572 conditions, 2822 events. 1665/2822 cut-off events. For 66488/66488 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 16672 event pairs, 354 based on Foata normal form. 6/2827 useless extension candidates. Maximal degree in co-relation 16504. Up to 2266 conditions per place. [2024-06-21 20:03:17,318 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 122 selfloop transitions, 99 changer transitions 0/228 dead transitions. [2024-06-21 20:03:17,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 228 transitions, 3087 flow [2024-06-21 20:03:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:03:17,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 20:03:17,319 INFO L175 Difference]: Start difference. First operand has 140 places, 195 transitions, 2374 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:03:17,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 228 transitions, 3087 flow [2024-06-21 20:03:17,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 228 transitions, 2957 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:17,423 INFO L231 Difference]: Finished difference. Result has 144 places, 200 transitions, 2559 flow [2024-06-21 20:03:17,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2559, PETRI_PLACES=144, PETRI_TRANSITIONS=200} [2024-06-21 20:03:17,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 20:03:17,423 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 200 transitions, 2559 flow [2024-06-21 20:03:17,424 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) [2024-06-21 20:03:17,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:03:17,424 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)] === [2024-06-21 20:03:17,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1348313486, now seen corresponding path program 1 times [2024-06-21 20:03:17,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251578091] [2024-06-21 20:03:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:17,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251578091] [2024-06-21 20:03:17,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251578091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:17,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:17,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:17,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173107411] [2024-06-21 20:03:17,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:17,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:17,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:17,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:17,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 200 transitions, 2559 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) [2024-06-21 20:03:17,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:17,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:17,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,810 INFO L124 PetriNetUnfolderBase]: 1660/2798 cut-off events. [2024-06-21 20:03:17,810 INFO L125 PetriNetUnfolderBase]: For 68146/68146 co-relation queries the response was YES. [2024-06-21 20:03:17,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16921 conditions, 2798 events. 1660/2798 cut-off events. For 68146/68146 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16438 event pairs, 355 based on Foata normal form. 2/2799 useless extension candidates. Maximal degree in co-relation 16852. Up to 2557 conditions per place. [2024-06-21 20:03:17,833 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 194 selfloop transitions, 10 changer transitions 0/211 dead transitions. [2024-06-21 20:03:17,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 211 transitions, 3019 flow [2024-06-21 20:03:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-21 20:03:17,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:03:17,834 INFO L175 Difference]: Start difference. First operand has 144 places, 200 transitions, 2559 flow. Second operand 4 states and 95 transitions. [2024-06-21 20:03:17,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 211 transitions, 3019 flow [2024-06-21 20:03:17,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 211 transitions, 2841 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:17,955 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2440 flow [2024-06-21 20:03:17,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2440, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-21 20:03:17,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 20:03:17,956 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2440 flow [2024-06-21 20:03:17,956 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) [2024-06-21 20:03:17,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:03:17,957 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)] === [2024-06-21 20:03:17,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1547518576, now seen corresponding path program 1 times [2024-06-21 20:03:17,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536079101] [2024-06-21 20:03:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536079101] [2024-06-21 20:03:18,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536079101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:18,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:18,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:18,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459459730] [2024-06-21 20:03:18,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:18,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:18,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2440 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) [2024-06-21 20:03:18,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:18,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:18,393 INFO L124 PetriNetUnfolderBase]: 1699/2858 cut-off events. [2024-06-21 20:03:18,393 INFO L125 PetriNetUnfolderBase]: For 74731/74731 co-relation queries the response was YES. [2024-06-21 20:03:18,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17154 conditions, 2858 events. 1699/2858 cut-off events. For 74731/74731 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16899 event pairs, 389 based on Foata normal form. 3/2851 useless extension candidates. Maximal degree in co-relation 17084. Up to 2080 conditions per place. [2024-06-21 20:03:18,416 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 117 selfloop transitions, 124 changer transitions 0/248 dead transitions. [2024-06-21 20:03:18,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 248 transitions, 3454 flow [2024-06-21 20:03:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:03:18,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 20:03:18,418 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2440 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:03:18,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 248 transitions, 3454 flow [2024-06-21 20:03:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 248 transitions, 3407 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:18,558 INFO L231 Difference]: Finished difference. Result has 151 places, 221 transitions, 3031 flow [2024-06-21 20:03:18,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3031, PETRI_PLACES=151, PETRI_TRANSITIONS=221} [2024-06-21 20:03:18,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-21 20:03:18,558 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 221 transitions, 3031 flow [2024-06-21 20:03:18,559 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) [2024-06-21 20:03:18,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:18,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:03:18,559 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)] === [2024-06-21 20:03:18,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash 6049779, now seen corresponding path program 1 times [2024-06-21 20:03:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:18,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470749934] [2024-06-21 20:03:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470749934] [2024-06-21 20:03:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470749934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:18,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:18,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:18,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676141821] [2024-06-21 20:03:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:18,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:18,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:18,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 221 transitions, 3031 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) [2024-06-21 20:03:18,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:18,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:18,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:18,981 INFO L124 PetriNetUnfolderBase]: 1725/2889 cut-off events. [2024-06-21 20:03:18,982 INFO L125 PetriNetUnfolderBase]: For 83486/83486 co-relation queries the response was YES. [2024-06-21 20:03:18,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18991 conditions, 2889 events. 1725/2889 cut-off events. For 83486/83486 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17003 event pairs, 386 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18918. Up to 2320 conditions per place. [2024-06-21 20:03:19,008 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 91 changer transitions 0/253 dead transitions. [2024-06-21 20:03:19,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 253 transitions, 3982 flow [2024-06-21 20:03:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:03:19,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:03:19,010 INFO L175 Difference]: Start difference. First operand has 151 places, 221 transitions, 3031 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:03:19,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 253 transitions, 3982 flow [2024-06-21 20:03:19,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 253 transitions, 3898 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:19,178 INFO L231 Difference]: Finished difference. Result has 157 places, 231 transitions, 3360 flow [2024-06-21 20:03:19,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3360, PETRI_PLACES=157, PETRI_TRANSITIONS=231} [2024-06-21 20:03:19,179 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-21 20:03:19,179 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 231 transitions, 3360 flow [2024-06-21 20:03:19,179 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) [2024-06-21 20:03:19,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:19,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:19,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:03:19,180 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:19,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash 11763699, now seen corresponding path program 2 times [2024-06-21 20:03:19,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:19,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63599051] [2024-06-21 20:03:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:19,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63599051] [2024-06-21 20:03:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63599051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:19,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949434826] [2024-06-21 20:03:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:19,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:19,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 231 transitions, 3360 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) [2024-06-21 20:03:19,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:19,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:19,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:19,603 INFO L124 PetriNetUnfolderBase]: 1719/2883 cut-off events. [2024-06-21 20:03:19,604 INFO L125 PetriNetUnfolderBase]: For 85285/85285 co-relation queries the response was YES. [2024-06-21 20:03:19,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18855 conditions, 2883 events. 1719/2883 cut-off events. For 85285/85285 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17036 event pairs, 386 based on Foata normal form. 2/2875 useless extension candidates. Maximal degree in co-relation 18778. Up to 2317 conditions per place. [2024-06-21 20:03:19,630 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 156 selfloop transitions, 87 changer transitions 0/250 dead transitions. [2024-06-21 20:03:19,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 250 transitions, 4102 flow [2024-06-21 20:03:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:19,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:03:19,631 INFO L175 Difference]: Start difference. First operand has 157 places, 231 transitions, 3360 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:19,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 250 transitions, 4102 flow [2024-06-21 20:03:19,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 250 transitions, 3975 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:19,799 INFO L231 Difference]: Finished difference. Result has 161 places, 231 transitions, 3416 flow [2024-06-21 20:03:19,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3416, PETRI_PLACES=161, PETRI_TRANSITIONS=231} [2024-06-21 20:03:19,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-21 20:03:19,800 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 231 transitions, 3416 flow [2024-06-21 20:03:19,800 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) [2024-06-21 20:03:19,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:19,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:19,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:03:19,801 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:19,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1556773006, now seen corresponding path program 2 times [2024-06-21 20:03:19,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:19,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967346547] [2024-06-21 20:03:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:19,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967346547] [2024-06-21 20:03:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967346547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:19,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:19,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459589211] [2024-06-21 20:03:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:19,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:19,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 231 transitions, 3416 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) [2024-06-21 20:03:19,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:19,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:19,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:20,258 INFO L124 PetriNetUnfolderBase]: 1786/2993 cut-off events. [2024-06-21 20:03:20,258 INFO L125 PetriNetUnfolderBase]: For 95134/95134 co-relation queries the response was YES. [2024-06-21 20:03:20,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19909 conditions, 2993 events. 1786/2993 cut-off events. For 95134/95134 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17799 event pairs, 393 based on Foata normal form. 3/2986 useless extension candidates. Maximal degree in co-relation 19831. Up to 2136 conditions per place. [2024-06-21 20:03:20,286 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 130 changer transitions 0/268 dead transitions. [2024-06-21 20:03:20,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 268 transitions, 4526 flow [2024-06-21 20:03:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:03:20,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 20:03:20,288 INFO L175 Difference]: Start difference. First operand has 161 places, 231 transitions, 3416 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:03:20,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 268 transitions, 4526 flow [2024-06-21 20:03:20,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 268 transitions, 4366 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:20,471 INFO L231 Difference]: Finished difference. Result has 166 places, 246 transitions, 3783 flow [2024-06-21 20:03:20,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3783, PETRI_PLACES=166, PETRI_TRANSITIONS=246} [2024-06-21 20:03:20,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 20:03:20,472 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 246 transitions, 3783 flow [2024-06-21 20:03:20,472 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) [2024-06-21 20:03:20,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:20,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:20,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:03:20,473 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:20,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash 11771232, now seen corresponding path program 3 times [2024-06-21 20:03:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757298043] [2024-06-21 20:03:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:20,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:20,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757298043] [2024-06-21 20:03:20,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757298043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:20,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:20,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:20,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157832430] [2024-06-21 20:03:20,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:20,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:20,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:20,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:20,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:20,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 246 transitions, 3783 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) [2024-06-21 20:03:20,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:20,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:20,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:20,917 INFO L124 PetriNetUnfolderBase]: 1781/2990 cut-off events. [2024-06-21 20:03:20,917 INFO L125 PetriNetUnfolderBase]: For 98204/98204 co-relation queries the response was YES. [2024-06-21 20:03:20,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20201 conditions, 2990 events. 1781/2990 cut-off events. For 98204/98204 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17792 event pairs, 393 based on Foata normal form. 3/2983 useless extension candidates. Maximal degree in co-relation 20121. Up to 2134 conditions per place. [2024-06-21 20:03:20,944 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 129 changer transitions 0/268 dead transitions. [2024-06-21 20:03:20,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 268 transitions, 4677 flow [2024-06-21 20:03:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:20,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:03:20,946 INFO L175 Difference]: Start difference. First operand has 166 places, 246 transitions, 3783 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:20,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 268 transitions, 4677 flow [2024-06-21 20:03:21,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 268 transitions, 4425 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:21,146 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 3798 flow [2024-06-21 20:03:21,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3798, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-21 20:03:21,147 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 20:03:21,147 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 3798 flow [2024-06-21 20:03:21,147 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) [2024-06-21 20:03:21,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:21,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:21,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:03:21,148 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:21,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1218339395, now seen corresponding path program 3 times [2024-06-21 20:03:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:21,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346038147] [2024-06-21 20:03:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:21,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:21,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346038147] [2024-06-21 20:03:21,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346038147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:21,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:21,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412283390] [2024-06-21 20:03:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:21,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:21,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:21,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 3798 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) [2024-06-21 20:03:21,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:21,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:21,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:21,613 INFO L124 PetriNetUnfolderBase]: 1767/2963 cut-off events. [2024-06-21 20:03:21,613 INFO L125 PetriNetUnfolderBase]: For 102400/102400 co-relation queries the response was YES. [2024-06-21 20:03:21,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19973 conditions, 2963 events. 1767/2963 cut-off events. For 102400/102400 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17593 event pairs, 393 based on Foata normal form. 2/2958 useless extension candidates. Maximal degree in co-relation 19892. Up to 2390 conditions per place. [2024-06-21 20:03:21,641 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 165 selfloop transitions, 93 changer transitions 0/265 dead transitions. [2024-06-21 20:03:21,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 265 transitions, 4588 flow [2024-06-21 20:03:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:03:21,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:03:21,642 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 3798 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:03:21,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 265 transitions, 4588 flow [2024-06-21 20:03:21,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 265 transitions, 4307 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:21,842 INFO L231 Difference]: Finished difference. Result has 172 places, 246 transitions, 3710 flow [2024-06-21 20:03:21,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3710, PETRI_PLACES=172, PETRI_TRANSITIONS=246} [2024-06-21 20:03:21,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 20:03:21,842 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 246 transitions, 3710 flow [2024-06-21 20:03:21,843 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) [2024-06-21 20:03:21,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:21,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:21,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:03:21,843 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:21,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1202487893, now seen corresponding path program 4 times [2024-06-21 20:03:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119989095] [2024-06-21 20:03:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:21,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:21,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119989095] [2024-06-21 20:03:21,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119989095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:21,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:21,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:21,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195983959] [2024-06-21 20:03:21,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:21,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:21,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:21,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:21,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:21,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 246 transitions, 3710 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) [2024-06-21 20:03:21,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:21,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:21,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:22,303 INFO L124 PetriNetUnfolderBase]: 1751/2949 cut-off events. [2024-06-21 20:03:22,303 INFO L125 PetriNetUnfolderBase]: For 100621/100621 co-relation queries the response was YES. [2024-06-21 20:03:22,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19508 conditions, 2949 events. 1751/2949 cut-off events. For 100621/100621 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17512 event pairs, 351 based on Foata normal form. 4/2952 useless extension candidates. Maximal degree in co-relation 19426. Up to 2643 conditions per place. [2024-06-21 20:03:22,330 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 217 selfloop transitions, 37 changer transitions 0/261 dead transitions. [2024-06-21 20:03:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 261 transitions, 4262 flow [2024-06-21 20:03:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 20:03:22,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-21 20:03:22,331 INFO L175 Difference]: Start difference. First operand has 172 places, 246 transitions, 3710 flow. Second operand 7 states and 159 transitions. [2024-06-21 20:03:22,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 261 transitions, 4262 flow [2024-06-21 20:03:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 3916 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:22,510 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 3453 flow [2024-06-21 20:03:22,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3453, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-21 20:03:22,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 20:03:22,511 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 3453 flow [2024-06-21 20:03:22,511 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) [2024-06-21 20:03:22,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:22,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:22,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:03:22,511 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)] === [2024-06-21 20:03:22,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash -746037595, now seen corresponding path program 5 times [2024-06-21 20:03:22,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:22,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393520215] [2024-06-21 20:03:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:22,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:22,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393520215] [2024-06-21 20:03:22,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393520215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:22,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:22,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420994242] [2024-06-21 20:03:22,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:22,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:22,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:22,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:22,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 3453 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) [2024-06-21 20:03:22,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:22,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:22,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:23,016 INFO L124 PetriNetUnfolderBase]: 1743/2939 cut-off events. [2024-06-21 20:03:23,017 INFO L125 PetriNetUnfolderBase]: For 100877/100877 co-relation queries the response was YES. [2024-06-21 20:03:23,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18915 conditions, 2939 events. 1743/2939 cut-off events. For 100877/100877 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17495 event pairs, 350 based on Foata normal form. 4/2942 useless extension candidates. Maximal degree in co-relation 18834. Up to 2381 conditions per place. [2024-06-21 20:03:23,043 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 168 selfloop transitions, 102 changer transitions 0/277 dead transitions. [2024-06-21 20:03:23,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 277 transitions, 4293 flow [2024-06-21 20:03:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:03:23,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 20:03:23,044 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 3453 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:03:23,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 277 transitions, 4293 flow [2024-06-21 20:03:23,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 277 transitions, 4231 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:23,278 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 3699 flow [2024-06-21 20:03:23,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3699, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-21 20:03:23,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 20:03:23,279 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 3699 flow [2024-06-21 20:03:23,279 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) [2024-06-21 20:03:23,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:23,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:23,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:03:23,280 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)] === [2024-06-21 20:03:23,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:23,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1429463815, now seen corresponding path program 6 times [2024-06-21 20:03:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:23,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950122958] [2024-06-21 20:03:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:23,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:23,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950122958] [2024-06-21 20:03:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950122958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:23,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:23,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516678521] [2024-06-21 20:03:23,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:23,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:23,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:23,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 3699 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) [2024-06-21 20:03:23,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:23,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:23,747 INFO L124 PetriNetUnfolderBase]: 1719/2897 cut-off events. [2024-06-21 20:03:23,747 INFO L125 PetriNetUnfolderBase]: For 102814/102817 co-relation queries the response was YES. [2024-06-21 20:03:23,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18893 conditions, 2897 events. 1719/2897 cut-off events. For 102814/102817 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17171 event pairs, 358 based on Foata normal form. 6/2901 useless extension candidates. Maximal degree in co-relation 18811. Up to 2361 conditions per place. [2024-06-21 20:03:23,774 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 170 selfloop transitions, 95 changer transitions 0/272 dead transitions. [2024-06-21 20:03:23,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 272 transitions, 4369 flow [2024-06-21 20:03:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:03:23,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-21 20:03:23,776 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 3699 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:03:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 272 transitions, 4369 flow [2024-06-21 20:03:24,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 272 transitions, 4141 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:24,050 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 3685 flow [2024-06-21 20:03:24,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3685, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-21 20:03:24,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 20:03:24,051 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 3685 flow [2024-06-21 20:03:24,051 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) [2024-06-21 20:03:24,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:24,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:03:24,051 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1429467442, now seen corresponding path program 4 times [2024-06-21 20:03:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834733822] [2024-06-21 20:03:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:24,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:24,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834733822] [2024-06-21 20:03:24,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834733822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:24,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:24,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:24,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224654691] [2024-06-21 20:03:24,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:24,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:24,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:24,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 3685 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) [2024-06-21 20:03:24,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:24,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:24,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:24,585 INFO L124 PetriNetUnfolderBase]: 1774/2986 cut-off events. [2024-06-21 20:03:24,585 INFO L125 PetriNetUnfolderBase]: For 101625/101628 co-relation queries the response was YES. [2024-06-21 20:03:24,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19490 conditions, 2986 events. 1774/2986 cut-off events. For 101625/101628 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17764 event pairs, 358 based on Foata normal form. 5/2989 useless extension candidates. Maximal degree in co-relation 19409. Up to 2350 conditions per place. [2024-06-21 20:03:24,615 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 173 selfloop transitions, 114 changer transitions 0/294 dead transitions. [2024-06-21 20:03:24,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 294 transitions, 4823 flow [2024-06-21 20:03:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:03:24,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-06-21 20:03:24,617 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 3685 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:03:24,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 294 transitions, 4823 flow [2024-06-21 20:03:24,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 294 transitions, 4533 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:24,827 INFO L231 Difference]: Finished difference. Result has 175 places, 264 transitions, 3993 flow [2024-06-21 20:03:24,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3993, PETRI_PLACES=175, PETRI_TRANSITIONS=264} [2024-06-21 20:03:24,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 20:03:24,828 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 264 transitions, 3993 flow [2024-06-21 20:03:24,828 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) [2024-06-21 20:03:24,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:24,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:03:24,829 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1165302590, now seen corresponding path program 5 times [2024-06-21 20:03:24,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151883228] [2024-06-21 20:03:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:24,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:24,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151883228] [2024-06-21 20:03:24,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151883228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:24,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:24,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:24,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398366731] [2024-06-21 20:03:24,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:24,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:24,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:24,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:24,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 264 transitions, 3993 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) [2024-06-21 20:03:24,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:24,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:24,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,331 INFO L124 PetriNetUnfolderBase]: 1785/3011 cut-off events. [2024-06-21 20:03:25,332 INFO L125 PetriNetUnfolderBase]: For 102254/102257 co-relation queries the response was YES. [2024-06-21 20:03:25,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19967 conditions, 3011 events. 1785/3011 cut-off events. For 102254/102257 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18038 event pairs, 358 based on Foata normal form. 5/3014 useless extension candidates. Maximal degree in co-relation 19884. Up to 2363 conditions per place. [2024-06-21 20:03:25,360 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 179 selfloop transitions, 108 changer transitions 0/294 dead transitions. [2024-06-21 20:03:25,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 294 transitions, 5000 flow [2024-06-21 20:03:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:25,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:03:25,362 INFO L175 Difference]: Start difference. First operand has 175 places, 264 transitions, 3993 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:25,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 294 transitions, 5000 flow [2024-06-21 20:03:25,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 4929 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:25,573 INFO L231 Difference]: Finished difference. Result has 182 places, 270 transitions, 4277 flow [2024-06-21 20:03:25,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2024-06-21 20:03:25,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 20:03:25,574 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 4277 flow [2024-06-21 20:03:25,574 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) [2024-06-21 20:03:25,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:25,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:25,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:03:25,575 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:25,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:25,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2083050032, now seen corresponding path program 1 times [2024-06-21 20:03:25,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:25,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590252086] [2024-06-21 20:03:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:25,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590252086] [2024-06-21 20:03:25,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590252086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:25,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:25,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:25,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536260027] [2024-06-21 20:03:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:25,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:25,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 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) [2024-06-21 20:03:25,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:25,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:25,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,113 INFO L124 PetriNetUnfolderBase]: 1808/3026 cut-off events. [2024-06-21 20:03:26,113 INFO L125 PetriNetUnfolderBase]: For 112148/112148 co-relation queries the response was YES. [2024-06-21 20:03:26,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3026 events. 1808/3026 cut-off events. For 112148/112148 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 17964 event pairs, 415 based on Foata normal form. 3/3022 useless extension candidates. Maximal degree in co-relation 20691. Up to 2186 conditions per place. [2024-06-21 20:03:26,138 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 116 selfloop transitions, 178 changer transitions 0/301 dead transitions. [2024-06-21 20:03:26,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 301 transitions, 5349 flow [2024-06-21 20:03:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:03:26,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:03:26,139 INFO L175 Difference]: Start difference. First operand has 182 places, 270 transitions, 4277 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:03:26,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 301 transitions, 5349 flow [2024-06-21 20:03:26,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 301 transitions, 5131 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:26,351 INFO L231 Difference]: Finished difference. Result has 186 places, 281 transitions, 4615 flow [2024-06-21 20:03:26,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4615, PETRI_PLACES=186, PETRI_TRANSITIONS=281} [2024-06-21 20:03:26,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 20:03:26,352 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 281 transitions, 4615 flow [2024-06-21 20:03:26,352 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) [2024-06-21 20:03:26,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:03:26,352 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1883160192, now seen corresponding path program 2 times [2024-06-21 20:03:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491010960] [2024-06-21 20:03:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491010960] [2024-06-21 20:03:26,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491010960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:26,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981207025] [2024-06-21 20:03:26,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:26,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:26,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:26,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 281 transitions, 4615 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) [2024-06-21 20:03:26,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:26,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,870 INFO L124 PetriNetUnfolderBase]: 1850/3115 cut-off events. [2024-06-21 20:03:26,870 INFO L125 PetriNetUnfolderBase]: For 118289/118289 co-relation queries the response was YES. [2024-06-21 20:03:26,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3115 events. 1850/3115 cut-off events. For 118289/118289 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18699 event pairs, 352 based on Foata normal form. 2/3116 useless extension candidates. Maximal degree in co-relation 21831. Up to 2757 conditions per place. [2024-06-21 20:03:26,901 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 256 selfloop transitions, 50 changer transitions 0/313 dead transitions. [2024-06-21 20:03:26,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 313 transitions, 5761 flow [2024-06-21 20:03:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:03:26,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:03:26,903 INFO L175 Difference]: Start difference. First operand has 186 places, 281 transitions, 4615 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:03:26,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 313 transitions, 5761 flow [2024-06-21 20:03:27,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 313 transitions, 5526 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:27,171 INFO L231 Difference]: Finished difference. Result has 193 places, 295 transitions, 4845 flow [2024-06-21 20:03:27,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4845, PETRI_PLACES=193, PETRI_TRANSITIONS=295} [2024-06-21 20:03:27,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 20:03:27,171 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 295 transitions, 4845 flow [2024-06-21 20:03:27,172 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) [2024-06-21 20:03:27,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:27,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:27,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:03:27,172 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:27,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1159588112, now seen corresponding path program 3 times [2024-06-21 20:03:27,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780948834] [2024-06-21 20:03:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:27,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:27,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:27,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780948834] [2024-06-21 20:03:27,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780948834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:27,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:27,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561326446] [2024-06-21 20:03:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:27,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:27,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:27,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 295 transitions, 4845 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) [2024-06-21 20:03:27,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:27,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:27,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:27,757 INFO L124 PetriNetUnfolderBase]: 1857/3136 cut-off events. [2024-06-21 20:03:27,757 INFO L125 PetriNetUnfolderBase]: For 122121/122121 co-relation queries the response was YES. [2024-06-21 20:03:27,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21778 conditions, 3136 events. 1857/3136 cut-off events. For 122121/122121 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18953 event pairs, 349 based on Foata normal form. 3/3138 useless extension candidates. Maximal degree in co-relation 21688. Up to 2430 conditions per place. [2024-06-21 20:03:27,784 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 177 selfloop transitions, 146 changer transitions 0/330 dead transitions. [2024-06-21 20:03:27,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 330 transitions, 5921 flow [2024-06-21 20:03:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:03:27,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:03:27,785 INFO L175 Difference]: Start difference. First operand has 193 places, 295 transitions, 4845 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:03:27,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 330 transitions, 5921 flow [2024-06-21 20:03:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 330 transitions, 5857 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:28,044 INFO L231 Difference]: Finished difference. Result has 199 places, 300 transitions, 5186 flow [2024-06-21 20:03:28,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5186, PETRI_PLACES=199, PETRI_TRANSITIONS=300} [2024-06-21 20:03:28,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-21 20:03:28,045 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 300 transitions, 5186 flow [2024-06-21 20:03:28,045 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) [2024-06-21 20:03:28,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:03:28,046 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1114328531, now seen corresponding path program 1 times [2024-06-21 20:03:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468593250] [2024-06-21 20:03:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468593250] [2024-06-21 20:03:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468593250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506492043] [2024-06-21 20:03:28,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:28,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:28,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 300 transitions, 5186 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) [2024-06-21 20:03:28,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:28,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:28,620 INFO L124 PetriNetUnfolderBase]: 1960/3279 cut-off events. [2024-06-21 20:03:28,621 INFO L125 PetriNetUnfolderBase]: For 149453/149453 co-relation queries the response was YES. [2024-06-21 20:03:28,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23416 conditions, 3279 events. 1960/3279 cut-off events. For 149453/149453 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19731 event pairs, 305 based on Foata normal form. 12/3281 useless extension candidates. Maximal degree in co-relation 23324. Up to 2400 conditions per place. [2024-06-21 20:03:28,654 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 104 changer transitions 0/344 dead transitions. [2024-06-21 20:03:28,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 344 transitions, 6414 flow [2024-06-21 20:03:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 20:03:28,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-21 20:03:28,656 INFO L175 Difference]: Start difference. First operand has 199 places, 300 transitions, 5186 flow. Second operand 7 states and 187 transitions. [2024-06-21 20:03:28,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 344 transitions, 6414 flow [2024-06-21 20:03:28,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 344 transitions, 6260 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:28,987 INFO L231 Difference]: Finished difference. Result has 203 places, 306 transitions, 5348 flow [2024-06-21 20:03:28,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5348, PETRI_PLACES=203, PETRI_TRANSITIONS=306} [2024-06-21 20:03:28,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-21 20:03:28,988 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 306 transitions, 5348 flow [2024-06-21 20:03:28,988 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) [2024-06-21 20:03:28,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:03:28,989 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash 77664987, now seen corresponding path program 2 times [2024-06-21 20:03:28,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348857999] [2024-06-21 20:03:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348857999] [2024-06-21 20:03:29,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348857999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:29,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81043223] [2024-06-21 20:03:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:29,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:29,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:29,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 306 transitions, 5348 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) [2024-06-21 20:03:29,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:29,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:29,629 INFO L124 PetriNetUnfolderBase]: 2004/3347 cut-off events. [2024-06-21 20:03:29,629 INFO L125 PetriNetUnfolderBase]: For 151809/151809 co-relation queries the response was YES. [2024-06-21 20:03:29,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24231 conditions, 3347 events. 2004/3347 cut-off events. For 151809/151809 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20220 event pairs, 421 based on Foata normal form. 12/3349 useless extension candidates. Maximal degree in co-relation 24137. Up to 2714 conditions per place. [2024-06-21 20:03:29,659 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 99 changer transitions 0/339 dead transitions. [2024-06-21 20:03:29,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 339 transitions, 6410 flow [2024-06-21 20:03:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:03:29,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:03:29,660 INFO L175 Difference]: Start difference. First operand has 203 places, 306 transitions, 5348 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:03:29,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 339 transitions, 6410 flow [2024-06-21 20:03:29,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 339 transitions, 6234 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:29,978 INFO L231 Difference]: Finished difference. Result has 207 places, 309 transitions, 5433 flow [2024-06-21 20:03:29,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5433, PETRI_PLACES=207, PETRI_TRANSITIONS=309} [2024-06-21 20:03:29,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-21 20:03:29,979 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 309 transitions, 5433 flow [2024-06-21 20:03:29,979 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) [2024-06-21 20:03:29,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:03:29,979 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)] === [2024-06-21 20:03:29,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash 364552317, now seen corresponding path program 3 times [2024-06-21 20:03:29,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646952692] [2024-06-21 20:03:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:30,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:30,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646952692] [2024-06-21 20:03:30,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646952692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:30,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:30,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:30,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497190782] [2024-06-21 20:03:30,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:30,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:30,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:30,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 309 transitions, 5433 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) [2024-06-21 20:03:30,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:30,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:30,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,583 INFO L124 PetriNetUnfolderBase]: 2048/3414 cut-off events. [2024-06-21 20:03:30,583 INFO L125 PetriNetUnfolderBase]: For 157500/157500 co-relation queries the response was YES. [2024-06-21 20:03:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24850 conditions, 3414 events. 2048/3414 cut-off events. For 157500/157500 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20664 event pairs, 426 based on Foata normal form. 12/3416 useless extension candidates. Maximal degree in co-relation 24754. Up to 2782 conditions per place. [2024-06-21 20:03:30,621 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 237 selfloop transitions, 91 changer transitions 0/335 dead transitions. [2024-06-21 20:03:30,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 335 transitions, 6383 flow [2024-06-21 20:03:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:03:30,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 20:03:30,622 INFO L175 Difference]: Start difference. First operand has 207 places, 309 transitions, 5433 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:03:30,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 335 transitions, 6383 flow [2024-06-21 20:03:31,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 335 transitions, 6170 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:31,005 INFO L231 Difference]: Finished difference. Result has 209 places, 312 transitions, 5463 flow [2024-06-21 20:03:31,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5463, PETRI_PLACES=209, PETRI_TRANSITIONS=312} [2024-06-21 20:03:31,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-21 20:03:31,006 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 312 transitions, 5463 flow [2024-06-21 20:03:31,006 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) [2024-06-21 20:03:31,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:03:31,007 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)] === [2024-06-21 20:03:31,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash 187544115, now seen corresponding path program 1 times [2024-06-21 20:03:31,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666838684] [2024-06-21 20:03:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666838684] [2024-06-21 20:03:31,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666838684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:31,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934671818] [2024-06-21 20:03:31,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:31,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:31,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:31,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 312 transitions, 5463 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) [2024-06-21 20:03:31,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:31,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:31,620 INFO L124 PetriNetUnfolderBase]: 2074/3457 cut-off events. [2024-06-21 20:03:31,620 INFO L125 PetriNetUnfolderBase]: For 156257/156257 co-relation queries the response was YES. [2024-06-21 20:03:31,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25400 conditions, 3457 events. 2074/3457 cut-off events. For 156257/156257 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20897 event pairs, 447 based on Foata normal form. 2/3449 useless extension candidates. Maximal degree in co-relation 25303. Up to 2528 conditions per place. [2024-06-21 20:03:31,660 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 191 changer transitions 0/345 dead transitions. [2024-06-21 20:03:31,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 345 transitions, 6666 flow [2024-06-21 20:03:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:03:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:03:31,661 INFO L175 Difference]: Start difference. First operand has 209 places, 312 transitions, 5463 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:03:31,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 345 transitions, 6666 flow [2024-06-21 20:03:32,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 345 transitions, 6463 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:32,044 INFO L231 Difference]: Finished difference. Result has 212 places, 322 transitions, 5886 flow [2024-06-21 20:03:32,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5886, PETRI_PLACES=212, PETRI_TRANSITIONS=322} [2024-06-21 20:03:32,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 20:03:32,045 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 322 transitions, 5886 flow [2024-06-21 20:03:32,045 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) [2024-06-21 20:03:32,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:32,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:32,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:03:32,046 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)] === [2024-06-21 20:03:32,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:32,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1351171189, now seen corresponding path program 1 times [2024-06-21 20:03:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992577069] [2024-06-21 20:03:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:32,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992577069] [2024-06-21 20:03:32,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992577069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:32,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83556463] [2024-06-21 20:03:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:32,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:32,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 322 transitions, 5886 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) [2024-06-21 20:03:32,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:32,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:32,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:32,689 INFO L124 PetriNetUnfolderBase]: 2084/3473 cut-off events. [2024-06-21 20:03:32,689 INFO L125 PetriNetUnfolderBase]: For 164128/164128 co-relation queries the response was YES. [2024-06-21 20:03:32,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26013 conditions, 3473 events. 2084/3473 cut-off events. For 164128/164128 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21054 event pairs, 421 based on Foata normal form. 2/3465 useless extension candidates. Maximal degree in co-relation 25914. Up to 2872 conditions per place. [2024-06-21 20:03:32,727 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 246 selfloop transitions, 95 changer transitions 0/348 dead transitions. [2024-06-21 20:03:32,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 348 transitions, 6882 flow [2024-06-21 20:03:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:03:32,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:03:32,729 INFO L175 Difference]: Start difference. First operand has 212 places, 322 transitions, 5886 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:03:32,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 348 transitions, 6882 flow [2024-06-21 20:03:33,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 348 transitions, 6625 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:33,192 INFO L231 Difference]: Finished difference. Result has 216 places, 326 transitions, 5900 flow [2024-06-21 20:03:33,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5900, PETRI_PLACES=216, PETRI_TRANSITIONS=326} [2024-06-21 20:03:33,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 20:03:33,193 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 326 transitions, 5900 flow [2024-06-21 20:03:33,193 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) [2024-06-21 20:03:33,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:33,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:33,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:03:33,194 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)] === [2024-06-21 20:03:33,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1015673483, now seen corresponding path program 2 times [2024-06-21 20:03:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:33,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021009097] [2024-06-21 20:03:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:33,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021009097] [2024-06-21 20:03:33,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021009097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:33,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:33,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360015828] [2024-06-21 20:03:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:33,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:33,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:33,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:33,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 326 transitions, 5900 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) [2024-06-21 20:03:33,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:33,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:33,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:33,852 INFO L124 PetriNetUnfolderBase]: 2094/3486 cut-off events. [2024-06-21 20:03:33,852 INFO L125 PetriNetUnfolderBase]: For 169674/169674 co-relation queries the response was YES. [2024-06-21 20:03:33,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25986 conditions, 3486 events. 2094/3486 cut-off events. For 169674/169674 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21094 event pairs, 447 based on Foata normal form. 2/3478 useless extension candidates. Maximal degree in co-relation 25886. Up to 2540 conditions per place. [2024-06-21 20:03:33,886 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 158 selfloop transitions, 185 changer transitions 0/350 dead transitions. [2024-06-21 20:03:33,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 350 transitions, 6996 flow [2024-06-21 20:03:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:33,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:03:33,888 INFO L175 Difference]: Start difference. First operand has 216 places, 326 transitions, 5900 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:33,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 350 transitions, 6996 flow [2024-06-21 20:03:34,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 350 transitions, 6784 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:34,391 INFO L231 Difference]: Finished difference. Result has 218 places, 330 transitions, 6144 flow [2024-06-21 20:03:34,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5688, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6144, PETRI_PLACES=218, PETRI_TRANSITIONS=330} [2024-06-21 20:03:34,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-21 20:03:34,392 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 330 transitions, 6144 flow [2024-06-21 20:03:34,392 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) [2024-06-21 20:03:34,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:34,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:34,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:03:34,392 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:34,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1104077513, now seen corresponding path program 3 times [2024-06-21 20:03:34,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:34,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455938269] [2024-06-21 20:03:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:34,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455938269] [2024-06-21 20:03:34,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455938269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:34,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:34,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:34,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337305722] [2024-06-21 20:03:34,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:34,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:34,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:34,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 330 transitions, 6144 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) [2024-06-21 20:03:34,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:34,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:34,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:34,983 INFO L124 PetriNetUnfolderBase]: 2088/3478 cut-off events. [2024-06-21 20:03:34,983 INFO L125 PetriNetUnfolderBase]: For 175048/175048 co-relation queries the response was YES. [2024-06-21 20:03:35,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26258 conditions, 3478 events. 2088/3478 cut-off events. For 175048/175048 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21079 event pairs, 446 based on Foata normal form. 2/3470 useless extension candidates. Maximal degree in co-relation 26157. Up to 2537 conditions per place. [2024-06-21 20:03:35,022 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 158 selfloop transitions, 185 changer transitions 0/350 dead transitions. [2024-06-21 20:03:35,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 350 transitions, 7172 flow [2024-06-21 20:03:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:35,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:03:35,023 INFO L175 Difference]: Start difference. First operand has 218 places, 330 transitions, 6144 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:35,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 350 transitions, 7172 flow [2024-06-21 20:03:35,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 350 transitions, 6817 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:35,533 INFO L231 Difference]: Finished difference. Result has 221 places, 330 transitions, 6166 flow [2024-06-21 20:03:35,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5789, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6166, PETRI_PLACES=221, PETRI_TRANSITIONS=330} [2024-06-21 20:03:35,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-21 20:03:35,534 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 330 transitions, 6166 flow [2024-06-21 20:03:35,534 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) [2024-06-21 20:03:35,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:35,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:03:35,535 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)] === [2024-06-21 20:03:35,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1088011421, now seen corresponding path program 2 times [2024-06-21 20:03:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:35,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928870311] [2024-06-21 20:03:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:35,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:35,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:35,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928870311] [2024-06-21 20:03:35,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928870311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:35,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:35,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:35,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834951982] [2024-06-21 20:03:35,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:35,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:35,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:35,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:35,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 330 transitions, 6166 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) [2024-06-21 20:03:35,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:35,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:35,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:36,161 INFO L124 PetriNetUnfolderBase]: 2098/3502 cut-off events. [2024-06-21 20:03:36,162 INFO L125 PetriNetUnfolderBase]: For 181190/181190 co-relation queries the response was YES. [2024-06-21 20:03:36,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26515 conditions, 3502 events. 2098/3502 cut-off events. For 181190/181190 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21255 event pairs, 420 based on Foata normal form. 2/3494 useless extension candidates. Maximal degree in co-relation 26413. Up to 2888 conditions per place. [2024-06-21 20:03:36,264 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 254 selfloop transitions, 96 changer transitions 0/357 dead transitions. [2024-06-21 20:03:36,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 357 transitions, 7320 flow [2024-06-21 20:03:36,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:03:36,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-21 20:03:36,265 INFO L175 Difference]: Start difference. First operand has 221 places, 330 transitions, 6166 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:03:36,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 357 transitions, 7320 flow [2024-06-21 20:03:36,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 357 transitions, 6964 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:36,732 INFO L231 Difference]: Finished difference. Result has 225 places, 336 transitions, 6115 flow [2024-06-21 20:03:36,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6115, PETRI_PLACES=225, PETRI_TRANSITIONS=336} [2024-06-21 20:03:36,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 20:03:36,733 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 336 transitions, 6115 flow [2024-06-21 20:03:36,733 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) [2024-06-21 20:03:36,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:36,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:36,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:03:36,733 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:36,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1388352423, now seen corresponding path program 1 times [2024-06-21 20:03:36,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:36,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031860568] [2024-06-21 20:03:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:36,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:36,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:36,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031860568] [2024-06-21 20:03:36,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031860568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:36,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:36,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:36,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404703261] [2024-06-21 20:03:36,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:36,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:36,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:36,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:36,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:36,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 336 transitions, 6115 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) [2024-06-21 20:03:36,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:36,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:36,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:37,353 INFO L124 PetriNetUnfolderBase]: 2106/3523 cut-off events. [2024-06-21 20:03:37,354 INFO L125 PetriNetUnfolderBase]: For 184002/184002 co-relation queries the response was YES. [2024-06-21 20:03:37,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26435 conditions, 3523 events. 2106/3523 cut-off events. For 184002/184002 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21496 event pairs, 389 based on Foata normal form. 2/3524 useless extension candidates. Maximal degree in co-relation 26332. Up to 3176 conditions per place. [2024-06-21 20:03:37,391 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 322 selfloop transitions, 27 changer transitions 0/356 dead transitions. [2024-06-21 20:03:37,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 356 transitions, 6905 flow [2024-06-21 20:03:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 20:03:37,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 20:03:37,393 INFO L175 Difference]: Start difference. First operand has 225 places, 336 transitions, 6115 flow. Second operand 7 states and 157 transitions. [2024-06-21 20:03:37,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 356 transitions, 6905 flow [2024-06-21 20:03:37,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 356 transitions, 6726 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:37,785 INFO L231 Difference]: Finished difference. Result has 228 places, 338 transitions, 6047 flow [2024-06-21 20:03:37,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6047, PETRI_PLACES=228, PETRI_TRANSITIONS=338} [2024-06-21 20:03:37,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-21 20:03:37,785 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 338 transitions, 6047 flow [2024-06-21 20:03:37,786 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) [2024-06-21 20:03:37,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:37,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:37,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:03:37,786 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:37,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1764997797, now seen corresponding path program 4 times [2024-06-21 20:03:37,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:37,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442361598] [2024-06-21 20:03:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:37,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:37,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442361598] [2024-06-21 20:03:37,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442361598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:37,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:37,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:37,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812026865] [2024-06-21 20:03:37,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:37,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:37,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:37,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:37,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:37,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:37,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 338 transitions, 6047 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) [2024-06-21 20:03:37,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:37,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:37,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:38,623 INFO L124 PetriNetUnfolderBase]: 2256/3770 cut-off events. [2024-06-21 20:03:38,624 INFO L125 PetriNetUnfolderBase]: For 258385/258388 co-relation queries the response was YES. [2024-06-21 20:03:38,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27207 conditions, 3770 events. 2256/3770 cut-off events. For 258385/258388 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23127 event pairs, 331 based on Foata normal form. 56/3824 useless extension candidates. Maximal degree in co-relation 27102. Up to 2792 conditions per place. [2024-06-21 20:03:38,657 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 262 selfloop transitions, 107 changer transitions 1/377 dead transitions. [2024-06-21 20:03:38,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 377 transitions, 7055 flow [2024-06-21 20:03:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:03:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-21 20:03:38,659 INFO L175 Difference]: Start difference. First operand has 228 places, 338 transitions, 6047 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:03:38,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 377 transitions, 7055 flow [2024-06-21 20:03:39,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 377 transitions, 6960 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:39,114 INFO L231 Difference]: Finished difference. Result has 230 places, 340 transitions, 6221 flow [2024-06-21 20:03:39,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6221, PETRI_PLACES=230, PETRI_TRANSITIONS=340} [2024-06-21 20:03:39,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 20:03:39,115 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 340 transitions, 6221 flow [2024-06-21 20:03:39,115 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) [2024-06-21 20:03:39,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:39,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:39,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:03:39,116 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:39,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash 150028661, now seen corresponding path program 3 times [2024-06-21 20:03:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:39,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917974953] [2024-06-21 20:03:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:39,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:39,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:39,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917974953] [2024-06-21 20:03:39,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917974953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:39,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:39,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:39,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605168574] [2024-06-21 20:03:39,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:39,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:39,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:39,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:39,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 340 transitions, 6221 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) [2024-06-21 20:03:39,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:39,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:39,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:39,727 INFO L124 PetriNetUnfolderBase]: 2243/3732 cut-off events. [2024-06-21 20:03:39,728 INFO L125 PetriNetUnfolderBase]: For 195747/195747 co-relation queries the response was YES. [2024-06-21 20:03:39,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27668 conditions, 3732 events. 2243/3732 cut-off events. For 195747/195747 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22815 event pairs, 473 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 27562. Up to 3130 conditions per place. [2024-06-21 20:03:39,767 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 245 selfloop transitions, 107 changer transitions 0/359 dead transitions. [2024-06-21 20:03:39,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 359 transitions, 7183 flow [2024-06-21 20:03:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:03:39,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:03:39,768 INFO L175 Difference]: Start difference. First operand has 230 places, 340 transitions, 6221 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:03:39,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 359 transitions, 7183 flow [2024-06-21 20:03:40,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 359 transitions, 6939 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:40,320 INFO L231 Difference]: Finished difference. Result has 232 places, 340 transitions, 6197 flow [2024-06-21 20:03:40,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=232, PETRI_TRANSITIONS=340} [2024-06-21 20:03:40,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 20:03:40,321 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 340 transitions, 6197 flow [2024-06-21 20:03:40,321 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) [2024-06-21 20:03:40,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:40,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:40,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:03:40,322 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:40,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1387757191, now seen corresponding path program 4 times [2024-06-21 20:03:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:40,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213301125] [2024-06-21 20:03:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:40,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213301125] [2024-06-21 20:03:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213301125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:40,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:40,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973924191] [2024-06-21 20:03:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:40,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:40,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:40,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 340 transitions, 6197 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) [2024-06-21 20:03:40,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:40,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:40,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:41,016 INFO L124 PetriNetUnfolderBase]: 2240/3734 cut-off events. [2024-06-21 20:03:41,016 INFO L125 PetriNetUnfolderBase]: For 198756/198756 co-relation queries the response was YES. [2024-06-21 20:03:41,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27461 conditions, 3734 events. 2240/3734 cut-off events. For 198756/198756 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22932 event pairs, 474 based on Foata normal form. 1/3728 useless extension candidates. Maximal degree in co-relation 27354. Up to 3128 conditions per place. [2024-06-21 20:03:41,056 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 248 selfloop transitions, 103 changer transitions 0/358 dead transitions. [2024-06-21 20:03:41,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 358 transitions, 7051 flow [2024-06-21 20:03:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:03:41,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:03:41,058 INFO L175 Difference]: Start difference. First operand has 232 places, 340 transitions, 6197 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:03:41,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 358 transitions, 7051 flow [2024-06-21 20:03:41,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 358 transitions, 6791 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:41,508 INFO L231 Difference]: Finished difference. Result has 234 places, 340 transitions, 6151 flow [2024-06-21 20:03:41,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5939, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6151, PETRI_PLACES=234, PETRI_TRANSITIONS=340} [2024-06-21 20:03:41,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-21 20:03:41,509 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 340 transitions, 6151 flow [2024-06-21 20:03:41,509 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) [2024-06-21 20:03:41,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:41,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:41,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:03:41,510 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:41,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1397063297, now seen corresponding path program 4 times [2024-06-21 20:03:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:41,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452391764] [2024-06-21 20:03:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:41,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:41,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452391764] [2024-06-21 20:03:41,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452391764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:41,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:41,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:41,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365511226] [2024-06-21 20:03:41,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:41,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:41,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:41,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:41,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 340 transitions, 6151 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) [2024-06-21 20:03:41,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:41,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:41,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:42,206 INFO L124 PetriNetUnfolderBase]: 2230/3708 cut-off events. [2024-06-21 20:03:42,207 INFO L125 PetriNetUnfolderBase]: For 197393/197393 co-relation queries the response was YES. [2024-06-21 20:03:42,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27135 conditions, 3708 events. 2230/3708 cut-off events. For 197393/197393 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22663 event pairs, 499 based on Foata normal form. 2/3703 useless extension candidates. Maximal degree in co-relation 27027. Up to 2777 conditions per place. [2024-06-21 20:03:42,251 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 208 changer transitions 0/360 dead transitions. [2024-06-21 20:03:42,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 360 transitions, 7229 flow [2024-06-21 20:03:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:03:42,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:03:42,253 INFO L175 Difference]: Start difference. First operand has 234 places, 340 transitions, 6151 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:03:42,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 360 transitions, 7229 flow [2024-06-21 20:03:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 360 transitions, 7009 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:42,824 INFO L231 Difference]: Finished difference. Result has 237 places, 340 transitions, 6354 flow [2024-06-21 20:03:42,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6354, PETRI_PLACES=237, PETRI_TRANSITIONS=340} [2024-06-21 20:03:42,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-21 20:03:42,825 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 340 transitions, 6354 flow [2024-06-21 20:03:42,825 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) [2024-06-21 20:03:42,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:42,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:42,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:03:42,826 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:42,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1407240287, now seen corresponding path program 5 times [2024-06-21 20:03:42,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:42,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784436173] [2024-06-21 20:03:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:42,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784436173] [2024-06-21 20:03:42,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784436173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:42,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:42,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:42,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437743185] [2024-06-21 20:03:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:42,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:42,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:42,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:42,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:42,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 340 transitions, 6354 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) [2024-06-21 20:03:42,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:42,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:43,456 INFO L124 PetriNetUnfolderBase]: 2224/3721 cut-off events. [2024-06-21 20:03:43,456 INFO L125 PetriNetUnfolderBase]: For 197702/197702 co-relation queries the response was YES. [2024-06-21 20:03:43,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27386 conditions, 3721 events. 2224/3721 cut-off events. For 197702/197702 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22864 event pairs, 431 based on Foata normal form. 2/3722 useless extension candidates. Maximal degree in co-relation 27277. Up to 3347 conditions per place. [2024-06-21 20:03:43,501 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 301 selfloop transitions, 50 changer transitions 0/358 dead transitions. [2024-06-21 20:03:43,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 358 transitions, 7327 flow [2024-06-21 20:03:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:03:43,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:03:43,502 INFO L175 Difference]: Start difference. First operand has 237 places, 340 transitions, 6354 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:03:43,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 358 transitions, 7327 flow [2024-06-21 20:03:44,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 358 transitions, 6387 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 20:03:44,006 INFO L231 Difference]: Finished difference. Result has 232 places, 340 transitions, 5521 flow [2024-06-21 20:03:44,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5521, PETRI_PLACES=232, PETRI_TRANSITIONS=340} [2024-06-21 20:03:44,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 20:03:44,007 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 340 transitions, 5521 flow [2024-06-21 20:03:44,007 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) [2024-06-21 20:03:44,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:44,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:44,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:03:44,007 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:44,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1764874479, now seen corresponding path program 6 times [2024-06-21 20:03:44,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:44,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852605830] [2024-06-21 20:03:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:44,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852605830] [2024-06-21 20:03:44,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852605830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:44,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:44,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757172952] [2024-06-21 20:03:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:44,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:44,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:44,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 340 transitions, 5521 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) [2024-06-21 20:03:44,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:44,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:44,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:44,688 INFO L124 PetriNetUnfolderBase]: 2234/3740 cut-off events. [2024-06-21 20:03:44,688 INFO L125 PetriNetUnfolderBase]: For 196881/196884 co-relation queries the response was YES. [2024-06-21 20:03:44,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26595 conditions, 3740 events. 2234/3740 cut-off events. For 196881/196884 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22995 event pairs, 438 based on Foata normal form. 4/3742 useless extension candidates. Maximal degree in co-relation 26487. Up to 3010 conditions per place. [2024-06-21 20:03:44,726 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 228 selfloop transitions, 135 changer transitions 0/370 dead transitions. [2024-06-21 20:03:44,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 370 transitions, 6722 flow [2024-06-21 20:03:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:44,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:03:44,728 INFO L175 Difference]: Start difference. First operand has 232 places, 340 transitions, 5521 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:44,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 370 transitions, 6722 flow [2024-06-21 20:03:45,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 370 transitions, 6598 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:45,276 INFO L231 Difference]: Finished difference. Result has 233 places, 344 transitions, 5749 flow [2024-06-21 20:03:45,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5749, PETRI_PLACES=233, PETRI_TRANSITIONS=344} [2024-06-21 20:03:45,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-21 20:03:45,277 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 344 transitions, 5749 flow [2024-06-21 20:03:45,277 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) [2024-06-21 20:03:45,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:45,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:45,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:03:45,278 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:45,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:45,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1652327999, now seen corresponding path program 7 times [2024-06-21 20:03:45,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:45,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119699762] [2024-06-21 20:03:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:45,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:45,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119699762] [2024-06-21 20:03:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119699762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:45,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:45,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:45,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735834476] [2024-06-21 20:03:45,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:45,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:45,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:45,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:45,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:45,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:45,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 344 transitions, 5749 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) [2024-06-21 20:03:45,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:45,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:45,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:45,917 INFO L124 PetriNetUnfolderBase]: 2226/3725 cut-off events. [2024-06-21 20:03:45,918 INFO L125 PetriNetUnfolderBase]: For 200941/200941 co-relation queries the response was YES. [2024-06-21 20:03:45,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26801 conditions, 3725 events. 2226/3725 cut-off events. For 200941/200941 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22894 event pairs, 430 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 26692. Up to 3004 conditions per place. [2024-06-21 20:03:45,959 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 147 changer transitions 0/374 dead transitions. [2024-06-21 20:03:45,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 374 transitions, 6899 flow [2024-06-21 20:03:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:03:45,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-21 20:03:45,960 INFO L175 Difference]: Start difference. First operand has 233 places, 344 transitions, 5749 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:03:45,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 374 transitions, 6899 flow [2024-06-21 20:03:46,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 6653 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:46,508 INFO L231 Difference]: Finished difference. Result has 236 places, 344 transitions, 5809 flow [2024-06-21 20:03:46,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5809, PETRI_PLACES=236, PETRI_TRANSITIONS=344} [2024-06-21 20:03:46,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 20:03:46,509 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 344 transitions, 5809 flow [2024-06-21 20:03:46,509 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) [2024-06-21 20:03:46,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:46,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:46,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:03:46,510 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:46,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:46,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1764867969, now seen corresponding path program 8 times [2024-06-21 20:03:46,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:46,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766754963] [2024-06-21 20:03:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:46,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:46,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:46,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766754963] [2024-06-21 20:03:46,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766754963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:46,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:46,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:46,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088593668] [2024-06-21 20:03:46,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:46,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:46,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:46,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:46,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:46,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:46,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 344 transitions, 5809 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) [2024-06-21 20:03:46,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:46,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:46,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:47,129 INFO L124 PetriNetUnfolderBase]: 2218/3716 cut-off events. [2024-06-21 20:03:47,129 INFO L125 PetriNetUnfolderBase]: For 204841/204844 co-relation queries the response was YES. [2024-06-21 20:03:47,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 3716 events. 2218/3716 cut-off events. For 204841/204844 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22881 event pairs, 438 based on Foata normal form. 4/3718 useless extension candidates. Maximal degree in co-relation 26646. Up to 2999 conditions per place. [2024-06-21 20:03:47,169 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 129 changer transitions 0/366 dead transitions. [2024-06-21 20:03:47,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 366 transitions, 6813 flow [2024-06-21 20:03:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:47,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:03:47,170 INFO L175 Difference]: Start difference. First operand has 236 places, 344 transitions, 5809 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:47,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 366 transitions, 6813 flow [2024-06-21 20:03:47,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 366 transitions, 6330 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 20:03:47,641 INFO L231 Difference]: Finished difference. Result has 234 places, 344 transitions, 5597 flow [2024-06-21 20:03:47,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5597, PETRI_PLACES=234, PETRI_TRANSITIONS=344} [2024-06-21 20:03:47,641 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-21 20:03:47,641 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 344 transitions, 5597 flow [2024-06-21 20:03:47,641 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) [2024-06-21 20:03:47,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:47,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:47,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:03:47,642 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:47,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1365131091, now seen corresponding path program 2 times [2024-06-21 20:03:47,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:47,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859236062] [2024-06-21 20:03:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:47,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859236062] [2024-06-21 20:03:47,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859236062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:47,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:47,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073704084] [2024-06-21 20:03:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:47,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 344 transitions, 5597 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) [2024-06-21 20:03:47,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:47,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:47,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:48,290 INFO L124 PetriNetUnfolderBase]: 2226/3725 cut-off events. [2024-06-21 20:03:48,290 INFO L125 PetriNetUnfolderBase]: For 203575/203575 co-relation queries the response was YES. [2024-06-21 20:03:48,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26602 conditions, 3725 events. 2226/3725 cut-off events. For 203575/203575 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22853 event pairs, 432 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 26493. Up to 3391 conditions per place. [2024-06-21 20:03:48,331 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 336 selfloop transitions, 19 changer transitions 0/362 dead transitions. [2024-06-21 20:03:48,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 362 transitions, 6399 flow [2024-06-21 20:03:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 20:03:48,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 20:03:48,332 INFO L175 Difference]: Start difference. First operand has 234 places, 344 transitions, 5597 flow. Second operand 5 states and 121 transitions. [2024-06-21 20:03:48,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 362 transitions, 6399 flow [2024-06-21 20:03:48,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 362 transitions, 6087 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:48,766 INFO L231 Difference]: Finished difference. Result has 232 places, 346 transitions, 5384 flow [2024-06-21 20:03:48,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5287, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5384, PETRI_PLACES=232, PETRI_TRANSITIONS=346} [2024-06-21 20:03:48,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 20:03:48,766 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 346 transitions, 5384 flow [2024-06-21 20:03:48,767 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) [2024-06-21 20:03:48,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:48,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:48,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:03:48,767 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:48,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1350846291, now seen corresponding path program 3 times [2024-06-21 20:03:48,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:48,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703878312] [2024-06-21 20:03:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:48,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:48,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:48,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703878312] [2024-06-21 20:03:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703878312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:48,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:48,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:48,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648644969] [2024-06-21 20:03:48,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:48,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:48,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:48,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:48,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 346 transitions, 5384 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) [2024-06-21 20:03:48,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:48,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:48,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:49,399 INFO L124 PetriNetUnfolderBase]: 2234/3737 cut-off events. [2024-06-21 20:03:49,399 INFO L125 PetriNetUnfolderBase]: For 201802/201802 co-relation queries the response was YES. [2024-06-21 20:03:49,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26283 conditions, 3737 events. 2234/3737 cut-off events. For 201802/201802 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22920 event pairs, 430 based on Foata normal form. 2/3738 useless extension candidates. Maximal degree in co-relation 26173. Up to 3389 conditions per place. [2024-06-21 20:03:49,443 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 336 selfloop transitions, 23 changer transitions 0/366 dead transitions. [2024-06-21 20:03:49,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 366 transitions, 6200 flow [2024-06-21 20:03:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:03:49,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:03:49,445 INFO L175 Difference]: Start difference. First operand has 232 places, 346 transitions, 5384 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:03:49,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 366 transitions, 6200 flow [2024-06-21 20:03:49,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 366 transitions, 6115 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:49,962 INFO L231 Difference]: Finished difference. Result has 235 places, 348 transitions, 5408 flow [2024-06-21 20:03:49,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5408, PETRI_PLACES=235, PETRI_TRANSITIONS=348} [2024-06-21 20:03:49,963 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 20:03:49,963 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 348 transitions, 5408 flow [2024-06-21 20:03:49,963 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) [2024-06-21 20:03:49,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:49,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:49,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:03:49,963 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:49,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 809616605, now seen corresponding path program 4 times [2024-06-21 20:03:49,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:49,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657673084] [2024-06-21 20:03:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657673084] [2024-06-21 20:03:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657673084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:50,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:50,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109245084] [2024-06-21 20:03:50,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:50,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:50,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:50,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:50,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 348 transitions, 5408 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) [2024-06-21 20:03:50,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:50,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:50,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:50,624 INFO L124 PetriNetUnfolderBase]: 2229/3732 cut-off events. [2024-06-21 20:03:50,624 INFO L125 PetriNetUnfolderBase]: For 204384/204384 co-relation queries the response was YES. [2024-06-21 20:03:50,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26177 conditions, 3732 events. 2229/3732 cut-off events. For 204384/204384 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22903 event pairs, 431 based on Foata normal form. 2/3733 useless extension candidates. Maximal degree in co-relation 26066. Up to 3393 conditions per place. [2024-06-21 20:03:50,668 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 338 selfloop transitions, 22 changer transitions 0/367 dead transitions. [2024-06-21 20:03:50,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 367 transitions, 6228 flow [2024-06-21 20:03:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 20:03:50,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-21 20:03:50,669 INFO L175 Difference]: Start difference. First operand has 235 places, 348 transitions, 5408 flow. Second operand 6 states and 139 transitions. [2024-06-21 20:03:50,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 367 transitions, 6228 flow [2024-06-21 20:03:51,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 367 transitions, 6135 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:51,209 INFO L231 Difference]: Finished difference. Result has 237 places, 350 transitions, 5426 flow [2024-06-21 20:03:51,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5426, PETRI_PLACES=237, PETRI_TRANSITIONS=350} [2024-06-21 20:03:51,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-21 20:03:51,210 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 350 transitions, 5426 flow [2024-06-21 20:03:51,210 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) [2024-06-21 20:03:51,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:51,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:51,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:03:51,211 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:51,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1151396203, now seen corresponding path program 1 times [2024-06-21 20:03:51,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:51,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189494178] [2024-06-21 20:03:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:51,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:51,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189494178] [2024-06-21 20:03:51,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189494178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:51,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:51,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:51,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461159461] [2024-06-21 20:03:51,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:51,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:51,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:51,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:51,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:51,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:51,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 350 transitions, 5426 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) [2024-06-21 20:03:51,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:51,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:51,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:51,894 INFO L124 PetriNetUnfolderBase]: 2332/3875 cut-off events. [2024-06-21 20:03:51,894 INFO L125 PetriNetUnfolderBase]: For 250061/250061 co-relation queries the response was YES. [2024-06-21 20:03:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27523 conditions, 3875 events. 2332/3875 cut-off events. For 250061/250061 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23815 event pairs, 411 based on Foata normal form. 12/3880 useless extension candidates. Maximal degree in co-relation 27411. Up to 2990 conditions per place. [2024-06-21 20:03:51,949 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 264 selfloop transitions, 115 changer transitions 0/386 dead transitions. [2024-06-21 20:03:51,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 386 transitions, 6618 flow [2024-06-21 20:03:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:03:51,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-21 20:03:51,951 INFO L175 Difference]: Start difference. First operand has 237 places, 350 transitions, 5426 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:03:51,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 386 transitions, 6618 flow [2024-06-21 20:03:52,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 386 transitions, 6523 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:52,638 INFO L231 Difference]: Finished difference. Result has 240 places, 356 transitions, 5673 flow [2024-06-21 20:03:52,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5673, PETRI_PLACES=240, PETRI_TRANSITIONS=356} [2024-06-21 20:03:52,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-21 20:03:52,639 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 356 transitions, 5673 flow [2024-06-21 20:03:52,639 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) [2024-06-21 20:03:52,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:52,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:52,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:03:52,640 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:52,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1636281059, now seen corresponding path program 2 times [2024-06-21 20:03:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:52,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868317413] [2024-06-21 20:03:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:52,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:52,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868317413] [2024-06-21 20:03:52,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868317413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:52,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:52,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:52,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252343302] [2024-06-21 20:03:52,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:52,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:52,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:52,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:52,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 356 transitions, 5673 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) [2024-06-21 20:03:52,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:52,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:52,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:53,370 INFO L124 PetriNetUnfolderBase]: 2376/3945 cut-off events. [2024-06-21 20:03:53,370 INFO L125 PetriNetUnfolderBase]: For 259716/259716 co-relation queries the response was YES. [2024-06-21 20:03:53,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 3945 events. 2376/3945 cut-off events. For 259716/259716 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24266 event pairs, 501 based on Foata normal form. 12/3950 useless extension candidates. Maximal degree in co-relation 28345. Up to 3296 conditions per place. [2024-06-21 20:03:53,416 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 264 selfloop transitions, 110 changer transitions 0/381 dead transitions. [2024-06-21 20:03:53,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 381 transitions, 6663 flow [2024-06-21 20:03:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:03:53,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:03:53,418 INFO L175 Difference]: Start difference. First operand has 240 places, 356 transitions, 5673 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:03:53,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 381 transitions, 6663 flow [2024-06-21 20:03:53,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 381 transitions, 6447 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:53,919 INFO L231 Difference]: Finished difference. Result has 244 places, 359 transitions, 5746 flow [2024-06-21 20:03:53,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5746, PETRI_PLACES=244, PETRI_TRANSITIONS=359} [2024-06-21 20:03:53,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-21 20:03:53,920 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 359 transitions, 5746 flow [2024-06-21 20:03:53,920 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) [2024-06-21 20:03:53,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:53,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:53,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:03:53,920 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:53,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1751572229, now seen corresponding path program 3 times [2024-06-21 20:03:53,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:53,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307509065] [2024-06-21 20:03:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:53,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:53,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:53,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307509065] [2024-06-21 20:03:53,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307509065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:53,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:53,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035262157] [2024-06-21 20:03:53,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:53,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:53,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:54,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:54,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 359 transitions, 5746 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) [2024-06-21 20:03:54,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:54,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:54,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:54,654 INFO L124 PetriNetUnfolderBase]: 2448/4077 cut-off events. [2024-06-21 20:03:54,654 INFO L125 PetriNetUnfolderBase]: For 281524/281524 co-relation queries the response was YES. [2024-06-21 20:03:54,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29396 conditions, 4077 events. 2448/4077 cut-off events. For 281524/281524 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25337 event pairs, 468 based on Foata normal form. 20/4096 useless extension candidates. Maximal degree in co-relation 29281. Up to 3637 conditions per place. [2024-06-21 20:03:54,773 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 335 selfloop transitions, 42 changer transitions 0/384 dead transitions. [2024-06-21 20:03:54,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 384 transitions, 6668 flow [2024-06-21 20:03:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 20:03:54,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 20:03:54,774 INFO L175 Difference]: Start difference. First operand has 244 places, 359 transitions, 5746 flow. Second operand 8 states and 181 transitions. [2024-06-21 20:03:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 384 transitions, 6668 flow [2024-06-21 20:03:55,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 384 transitions, 6423 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:55,313 INFO L231 Difference]: Finished difference. Result has 247 places, 364 transitions, 5701 flow [2024-06-21 20:03:55,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5701, PETRI_PLACES=247, PETRI_TRANSITIONS=364} [2024-06-21 20:03:55,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 20:03:55,316 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 364 transitions, 5701 flow [2024-06-21 20:03:55,316 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) [2024-06-21 20:03:55,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:55,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:55,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:03:55,316 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:55,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1033063375, now seen corresponding path program 1 times [2024-06-21 20:03:55,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:55,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126151735] [2024-06-21 20:03:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:55,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:55,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126151735] [2024-06-21 20:03:55,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126151735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:55,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:55,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:55,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518725925] [2024-06-21 20:03:55,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:55,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:55,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:55,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:55,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:55,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 364 transitions, 5701 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) [2024-06-21 20:03:55,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:55,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:55,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:56,041 INFO L124 PetriNetUnfolderBase]: 2456/4087 cut-off events. [2024-06-21 20:03:56,042 INFO L125 PetriNetUnfolderBase]: For 253657/253657 co-relation queries the response was YES. [2024-06-21 20:03:56,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29424 conditions, 4087 events. 2456/4087 cut-off events. For 253657/253657 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25324 event pairs, 468 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 29308. Up to 3743 conditions per place. [2024-06-21 20:03:56,089 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 351 selfloop transitions, 24 changer transitions 0/382 dead transitions. [2024-06-21 20:03:56,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 382 transitions, 6533 flow [2024-06-21 20:03:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 20:03:56,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 20:03:56,090 INFO L175 Difference]: Start difference. First operand has 247 places, 364 transitions, 5701 flow. Second operand 7 states and 154 transitions. [2024-06-21 20:03:56,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 382 transitions, 6533 flow [2024-06-21 20:03:56,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 382 transitions, 6399 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:56,717 INFO L231 Difference]: Finished difference. Result has 249 places, 367 transitions, 5676 flow [2024-06-21 20:03:56,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5676, PETRI_PLACES=249, PETRI_TRANSITIONS=367} [2024-06-21 20:03:56,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 20:03:56,718 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 367 transitions, 5676 flow [2024-06-21 20:03:56,718 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) [2024-06-21 20:03:56,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:56,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:56,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:03:56,721 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:56,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1587497067, now seen corresponding path program 4 times [2024-06-21 20:03:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264913886] [2024-06-21 20:03:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:56,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264913886] [2024-06-21 20:03:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264913886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:56,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:56,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:56,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381837004] [2024-06-21 20:03:56,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:56,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:56,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:56,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:56,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 367 transitions, 5676 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) [2024-06-21 20:03:56,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:56,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,529 INFO L124 PetriNetUnfolderBase]: 2619/4349 cut-off events. [2024-06-21 20:03:57,529 INFO L125 PetriNetUnfolderBase]: For 365225/365225 co-relation queries the response was YES. [2024-06-21 20:03:57,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30408 conditions, 4349 events. 2619/4349 cut-off events. For 365225/365225 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27286 event pairs, 430 based on Foata normal form. 54/4402 useless extension candidates. Maximal degree in co-relation 30290. Up to 3307 conditions per place. [2024-06-21 20:03:57,583 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 284 selfloop transitions, 116 changer transitions 1/408 dead transitions. [2024-06-21 20:03:57,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 408 transitions, 6808 flow [2024-06-21 20:03:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 20:03:57,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:03:57,593 INFO L175 Difference]: Start difference. First operand has 249 places, 367 transitions, 5676 flow. Second operand 8 states and 208 transitions. [2024-06-21 20:03:57,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 408 transitions, 6808 flow [2024-06-21 20:03:58,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 408 transitions, 6731 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:58,211 INFO L231 Difference]: Finished difference. Result has 253 places, 370 transitions, 5932 flow [2024-06-21 20:03:58,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5932, PETRI_PLACES=253, PETRI_TRANSITIONS=370} [2024-06-21 20:03:58,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 20:03:58,212 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 370 transitions, 5932 flow [2024-06-21 20:03:58,212 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) [2024-06-21 20:03:58,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:58,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:03:58,212 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:58,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1587312369, now seen corresponding path program 2 times [2024-06-21 20:03:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240761806] [2024-06-21 20:03:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:58,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240761806] [2024-06-21 20:03:58,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240761806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:58,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2754289] [2024-06-21 20:03:58,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:58,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:58,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:58,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 370 transitions, 5932 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) [2024-06-21 20:03:58,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:58,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:58,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:59,028 INFO L124 PetriNetUnfolderBase]: 2622/4359 cut-off events. [2024-06-21 20:03:59,028 INFO L125 PetriNetUnfolderBase]: For 268674/268674 co-relation queries the response was YES. [2024-06-21 20:03:59,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31284 conditions, 4359 events. 2622/4359 cut-off events. For 268674/268674 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27319 event pairs, 515 based on Foata normal form. 2/4360 useless extension candidates. Maximal degree in co-relation 31165. Up to 4006 conditions per place. [2024-06-21 20:03:59,077 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 353 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-21 20:03:59,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 389 transitions, 6823 flow [2024-06-21 20:03:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-21 20:03:59,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 20:03:59,079 INFO L175 Difference]: Start difference. First operand has 253 places, 370 transitions, 5932 flow. Second operand 6 states and 136 transitions. [2024-06-21 20:03:59,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 389 transitions, 6823 flow [2024-06-21 20:03:59,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 389 transitions, 6543 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:59,748 INFO L231 Difference]: Finished difference. Result has 253 places, 375 transitions, 5815 flow [2024-06-21 20:03:59,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5815, PETRI_PLACES=253, PETRI_TRANSITIONS=375} [2024-06-21 20:03:59,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 20:03:59,749 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 375 transitions, 5815 flow [2024-06-21 20:03:59,749 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) [2024-06-21 20:03:59,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:59,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:59,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:03:59,749 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:59,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1359411219, now seen corresponding path program 3 times [2024-06-21 20:03:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917836338] [2024-06-21 20:03:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:59,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917836338] [2024-06-21 20:03:59,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917836338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:59,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:59,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:59,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336573618] [2024-06-21 20:03:59,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:59,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:59,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:59,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:59,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:59,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:59,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 375 transitions, 5815 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) [2024-06-21 20:03:59,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:59,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:59,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:00,510 INFO L124 PetriNetUnfolderBase]: 2630/4371 cut-off events. [2024-06-21 20:04:00,511 INFO L125 PetriNetUnfolderBase]: For 264710/264710 co-relation queries the response was YES. [2024-06-21 20:04:00,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30656 conditions, 4371 events. 2630/4371 cut-off events. For 264710/264710 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27440 event pairs, 517 based on Foata normal form. 2/4372 useless extension candidates. Maximal degree in co-relation 30536. Up to 4012 conditions per place. [2024-06-21 20:04:00,561 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 354 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-06-21 20:04:00,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 390 transitions, 6655 flow [2024-06-21 20:04:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 20:04:00,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 20:04:00,563 INFO L175 Difference]: Start difference. First operand has 253 places, 375 transitions, 5815 flow. Second operand 5 states and 118 transitions. [2024-06-21 20:04:00,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 390 transitions, 6655 flow [2024-06-21 20:04:01,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 390 transitions, 6581 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:01,163 INFO L231 Difference]: Finished difference. Result has 256 places, 377 transitions, 5856 flow [2024-06-21 20:04:01,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5856, PETRI_PLACES=256, PETRI_TRANSITIONS=377} [2024-06-21 20:04:01,164 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 20:04:01,164 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 377 transitions, 5856 flow [2024-06-21 20:04:01,164 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) [2024-06-21 20:04:01,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:01,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:04:01,164 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:01,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1350840339, now seen corresponding path program 4 times [2024-06-21 20:04:01,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:01,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032671638] [2024-06-21 20:04:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:01,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:01,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032671638] [2024-06-21 20:04:01,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032671638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:01,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:01,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479113633] [2024-06-21 20:04:01,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:01,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:01,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:01,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 377 transitions, 5856 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) [2024-06-21 20:04:01,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:01,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:01,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:01,940 INFO L124 PetriNetUnfolderBase]: 2625/4357 cut-off events. [2024-06-21 20:04:01,940 INFO L125 PetriNetUnfolderBase]: For 260687/260690 co-relation queries the response was YES. [2024-06-21 20:04:01,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30441 conditions, 4357 events. 2625/4357 cut-off events. For 260687/260690 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 27243 event pairs, 521 based on Foata normal form. 4/4359 useless extension candidates. Maximal degree in co-relation 30320. Up to 3991 conditions per place. [2024-06-21 20:04:01,987 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 353 selfloop transitions, 30 changer transitions 0/390 dead transitions. [2024-06-21 20:04:01,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 390 transitions, 6690 flow [2024-06-21 20:04:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 20:04:01,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:04:01,988 INFO L175 Difference]: Start difference. First operand has 256 places, 377 transitions, 5856 flow. Second operand 5 states and 115 transitions. [2024-06-21 20:04:01,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 390 transitions, 6690 flow [2024-06-21 20:04:02,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 390 transitions, 6601 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:02,555 INFO L231 Difference]: Finished difference. Result has 258 places, 379 transitions, 5878 flow [2024-06-21 20:04:02,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5878, PETRI_PLACES=258, PETRI_TRANSITIONS=379} [2024-06-21 20:04:02,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-21 20:04:02,556 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 379 transitions, 5878 flow [2024-06-21 20:04:02,556 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) [2024-06-21 20:04:02,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:02,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:04:02,556 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:02,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918283, now seen corresponding path program 1 times [2024-06-21 20:04:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121818966] [2024-06-21 20:04:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:02,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:02,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121818966] [2024-06-21 20:04:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121818966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:02,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:02,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043769318] [2024-06-21 20:04:02,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:02,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:02,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 379 transitions, 5878 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) [2024-06-21 20:04:02,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:02,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:03,468 INFO L124 PetriNetUnfolderBase]: 2939/4889 cut-off events. [2024-06-21 20:04:03,469 INFO L125 PetriNetUnfolderBase]: For 420280/420280 co-relation queries the response was YES. [2024-06-21 20:04:03,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35365 conditions, 4889 events. 2939/4889 cut-off events. For 420280/420280 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31141 event pairs, 590 based on Foata normal form. 36/4915 useless extension candidates. Maximal degree in co-relation 35243. Up to 2682 conditions per place. [2024-06-21 20:04:03,527 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 232 changer transitions 7/430 dead transitions. [2024-06-21 20:04:03,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 430 transitions, 7516 flow [2024-06-21 20:04:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 20:04:03,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-06-21 20:04:03,528 INFO L175 Difference]: Start difference. First operand has 258 places, 379 transitions, 5878 flow. Second operand 8 states and 215 transitions. [2024-06-21 20:04:03,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 430 transitions, 7516 flow [2024-06-21 20:04:04,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 430 transitions, 7425 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:04,277 INFO L231 Difference]: Finished difference. Result has 263 places, 382 transitions, 6338 flow [2024-06-21 20:04:04,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6338, PETRI_PLACES=263, PETRI_TRANSITIONS=382} [2024-06-21 20:04:04,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-21 20:04:04,277 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 382 transitions, 6338 flow [2024-06-21 20:04:04,277 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) [2024-06-21 20:04:04,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:04,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:04,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:04:04,278 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:04,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1887351733, now seen corresponding path program 2 times [2024-06-21 20:04:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553131918] [2024-06-21 20:04:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:04,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:04,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553131918] [2024-06-21 20:04:04,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553131918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:04,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:04,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:04,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177281674] [2024-06-21 20:04:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:04,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:04,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:04,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:04,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 382 transitions, 6338 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) [2024-06-21 20:04:04,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:04,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:04,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:05,429 INFO L124 PetriNetUnfolderBase]: 3216/5338 cut-off events. [2024-06-21 20:04:05,429 INFO L125 PetriNetUnfolderBase]: For 536264/536264 co-relation queries the response was YES. [2024-06-21 20:04:05,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41359 conditions, 5338 events. 3216/5338 cut-off events. For 536264/536264 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34521 event pairs, 832 based on Foata normal form. 36/5364 useless extension candidates. Maximal degree in co-relation 41236. Up to 3825 conditions per place. [2024-06-21 20:04:05,494 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 221 changer transitions 4/426 dead transitions. [2024-06-21 20:04:05,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 426 transitions, 7956 flow [2024-06-21 20:04:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 20:04:05,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-21 20:04:05,495 INFO L175 Difference]: Start difference. First operand has 263 places, 382 transitions, 6338 flow. Second operand 8 states and 210 transitions. [2024-06-21 20:04:05,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 426 transitions, 7956 flow [2024-06-21 20:04:06,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 426 transitions, 7606 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:06,327 INFO L231 Difference]: Finished difference. Result has 267 places, 385 transitions, 6540 flow [2024-06-21 20:04:06,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5996, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6540, PETRI_PLACES=267, PETRI_TRANSITIONS=385} [2024-06-21 20:04:06,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 20:04:06,328 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 385 transitions, 6540 flow [2024-06-21 20:04:06,328 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) [2024-06-21 20:04:06,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:06,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:06,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:04:06,328 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:06,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:06,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1887025303, now seen corresponding path program 3 times [2024-06-21 20:04:06,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:06,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245669903] [2024-06-21 20:04:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245669903] [2024-06-21 20:04:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245669903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:06,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:06,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792985218] [2024-06-21 20:04:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:06,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:06,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 385 transitions, 6540 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) [2024-06-21 20:04:06,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:06,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:06,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:07,372 INFO L124 PetriNetUnfolderBase]: 3099/5163 cut-off events. [2024-06-21 20:04:07,372 INFO L125 PetriNetUnfolderBase]: For 469366/469366 co-relation queries the response was YES. [2024-06-21 20:04:07,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38265 conditions, 5163 events. 3099/5163 cut-off events. For 469366/469366 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33347 event pairs, 828 based on Foata normal form. 42/5195 useless extension candidates. Maximal degree in co-relation 38140. Up to 3987 conditions per place. [2024-06-21 20:04:07,432 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 192 selfloop transitions, 216 changer transitions 3/418 dead transitions. [2024-06-21 20:04:07,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 418 transitions, 7864 flow [2024-06-21 20:04:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:04:07,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-21 20:04:07,434 INFO L175 Difference]: Start difference. First operand has 267 places, 385 transitions, 6540 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:04:07,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 418 transitions, 7864 flow [2024-06-21 20:04:08,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 418 transitions, 7507 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:08,260 INFO L231 Difference]: Finished difference. Result has 271 places, 384 transitions, 6612 flow [2024-06-21 20:04:08,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6612, PETRI_PLACES=271, PETRI_TRANSITIONS=384} [2024-06-21 20:04:08,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-21 20:04:08,260 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 384 transitions, 6612 flow [2024-06-21 20:04:08,260 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) [2024-06-21 20:04:08,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:08,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:04:08,261 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:08,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1572727905, now seen corresponding path program 4 times [2024-06-21 20:04:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553637717] [2024-06-21 20:04:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:08,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:08,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553637717] [2024-06-21 20:04:08,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553637717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:08,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:08,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:08,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703940558] [2024-06-21 20:04:08,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:08,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:08,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:08,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 384 transitions, 6612 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) [2024-06-21 20:04:08,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:08,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:08,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:09,334 INFO L124 PetriNetUnfolderBase]: 3221/5363 cut-off events. [2024-06-21 20:04:09,334 INFO L125 PetriNetUnfolderBase]: For 483408/483408 co-relation queries the response was YES. [2024-06-21 20:04:09,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39605 conditions, 5363 events. 3221/5363 cut-off events. For 483408/483408 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34966 event pairs, 874 based on Foata normal form. 42/5395 useless extension candidates. Maximal degree in co-relation 39478. Up to 4189 conditions per place. [2024-06-21 20:04:09,388 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 190 changer transitions 3/412 dead transitions. [2024-06-21 20:04:09,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 412 transitions, 7834 flow [2024-06-21 20:04:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:04:09,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:04:09,389 INFO L175 Difference]: Start difference. First operand has 271 places, 384 transitions, 6612 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:04:09,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 412 transitions, 7834 flow [2024-06-21 20:04:10,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 412 transitions, 7394 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:10,253 INFO L231 Difference]: Finished difference. Result has 272 places, 385 transitions, 6610 flow [2024-06-21 20:04:10,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6610, PETRI_PLACES=272, PETRI_TRANSITIONS=385} [2024-06-21 20:04:10,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-21 20:04:10,253 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 385 transitions, 6610 flow [2024-06-21 20:04:10,254 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) [2024-06-21 20:04:10,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:10,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:10,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:04:10,254 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:10,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1583452665, now seen corresponding path program 5 times [2024-06-21 20:04:10,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:10,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846721796] [2024-06-21 20:04:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:10,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:10,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:10,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846721796] [2024-06-21 20:04:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846721796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:10,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258374302] [2024-06-21 20:04:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:10,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:10,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:10,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 385 transitions, 6610 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) [2024-06-21 20:04:10,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:10,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:10,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:11,294 INFO L124 PetriNetUnfolderBase]: 3343/5587 cut-off events. [2024-06-21 20:04:11,294 INFO L125 PetriNetUnfolderBase]: For 496092/496092 co-relation queries the response was YES. [2024-06-21 20:04:11,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40808 conditions, 5587 events. 3343/5587 cut-off events. For 496092/496092 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36840 event pairs, 934 based on Foata normal form. 42/5619 useless extension candidates. Maximal degree in co-relation 40680. Up to 4391 conditions per place. [2024-06-21 20:04:11,362 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 213 selfloop transitions, 190 changer transitions 3/413 dead transitions. [2024-06-21 20:04:11,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 413 transitions, 7842 flow [2024-06-21 20:04:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:04:11,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:04:11,364 INFO L175 Difference]: Start difference. First operand has 272 places, 385 transitions, 6610 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:04:11,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 413 transitions, 7842 flow [2024-06-21 20:04:12,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 413 transitions, 7432 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:12,319 INFO L231 Difference]: Finished difference. Result has 274 places, 386 transitions, 6642 flow [2024-06-21 20:04:12,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6642, PETRI_PLACES=274, PETRI_TRANSITIONS=386} [2024-06-21 20:04:12,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 20:04:12,320 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 386 transitions, 6642 flow [2024-06-21 20:04:12,320 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) [2024-06-21 20:04:12,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:12,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:04:12,320 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:12,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1583779095, now seen corresponding path program 6 times [2024-06-21 20:04:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:12,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024062381] [2024-06-21 20:04:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:12,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:12,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:12,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024062381] [2024-06-21 20:04:12,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024062381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:12,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:12,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435288502] [2024-06-21 20:04:12,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:12,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:12,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:12,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:12,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 386 transitions, 6642 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) [2024-06-21 20:04:12,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:12,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:13,412 INFO L124 PetriNetUnfolderBase]: 3441/5753 cut-off events. [2024-06-21 20:04:13,412 INFO L125 PetriNetUnfolderBase]: For 497249/497249 co-relation queries the response was YES. [2024-06-21 20:04:13,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41622 conditions, 5753 events. 3441/5753 cut-off events. For 497249/497249 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 38152 event pairs, 918 based on Foata normal form. 36/5779 useless extension candidates. Maximal degree in co-relation 41493. Up to 4163 conditions per place. [2024-06-21 20:04:13,472 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 195 changer transitions 6/420 dead transitions. [2024-06-21 20:04:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 420 transitions, 7930 flow [2024-06-21 20:04:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:04:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:04:13,473 INFO L175 Difference]: Start difference. First operand has 274 places, 386 transitions, 6642 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:04:13,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 420 transitions, 7930 flow [2024-06-21 20:04:14,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 420 transitions, 7516 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:14,558 INFO L231 Difference]: Finished difference. Result has 276 places, 387 transitions, 6675 flow [2024-06-21 20:04:14,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6228, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6675, PETRI_PLACES=276, PETRI_TRANSITIONS=387} [2024-06-21 20:04:14,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 20:04:14,558 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 387 transitions, 6675 flow [2024-06-21 20:04:14,559 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) [2024-06-21 20:04:14,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:14,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:14,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:04:14,559 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:14,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash 26816525, now seen corresponding path program 1 times [2024-06-21 20:04:14,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:14,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80807952] [2024-06-21 20:04:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80807952] [2024-06-21 20:04:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80807952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:14,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:14,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33647391] [2024-06-21 20:04:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:14,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:14,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:14,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 387 transitions, 6675 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:14,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:14,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:14,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:15,507 INFO L124 PetriNetUnfolderBase]: 3440/5770 cut-off events. [2024-06-21 20:04:15,508 INFO L125 PetriNetUnfolderBase]: For 432065/432068 co-relation queries the response was YES. [2024-06-21 20:04:15,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42119 conditions, 5770 events. 3440/5770 cut-off events. For 432065/432068 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38512 event pairs, 975 based on Foata normal form. 3/5764 useless extension candidates. Maximal degree in co-relation 41989. Up to 5076 conditions per place. [2024-06-21 20:04:15,580 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 308 selfloop transitions, 103 changer transitions 0/418 dead transitions. [2024-06-21 20:04:15,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 418 transitions, 8211 flow [2024-06-21 20:04:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:04:15,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:04:15,581 INFO L175 Difference]: Start difference. First operand has 276 places, 387 transitions, 6675 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:04:15,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 418 transitions, 8211 flow [2024-06-21 20:04:16,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 418 transitions, 7766 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:16,774 INFO L231 Difference]: Finished difference. Result has 276 places, 399 transitions, 6684 flow [2024-06-21 20:04:16,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6246, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6684, PETRI_PLACES=276, PETRI_TRANSITIONS=399} [2024-06-21 20:04:16,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 20:04:16,775 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 399 transitions, 6684 flow [2024-06-21 20:04:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:16,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:16,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:04:16,775 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:16,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:16,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1502596925, now seen corresponding path program 2 times [2024-06-21 20:04:16,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:16,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979050592] [2024-06-21 20:04:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:16,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:16,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:16,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979050592] [2024-06-21 20:04:16,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979050592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:16,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:16,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:16,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594547162] [2024-06-21 20:04:16,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:16,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:16,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:16,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:16,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 399 transitions, 6684 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:16,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:16,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:17,805 INFO L124 PetriNetUnfolderBase]: 3437/5764 cut-off events. [2024-06-21 20:04:17,806 INFO L125 PetriNetUnfolderBase]: For 434861/434864 co-relation queries the response was YES. [2024-06-21 20:04:17,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41505 conditions, 5764 events. 3437/5764 cut-off events. For 434861/434864 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38425 event pairs, 976 based on Foata normal form. 3/5758 useless extension candidates. Maximal degree in co-relation 41374. Up to 5073 conditions per place. [2024-06-21 20:04:17,869 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 309 selfloop transitions, 99 changer transitions 0/415 dead transitions. [2024-06-21 20:04:17,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 415 transitions, 7970 flow [2024-06-21 20:04:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:04:17,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:04:17,871 INFO L175 Difference]: Start difference. First operand has 276 places, 399 transitions, 6684 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:04:17,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 415 transitions, 7970 flow [2024-06-21 20:04:18,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 415 transitions, 7826 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:18,755 INFO L231 Difference]: Finished difference. Result has 280 places, 399 transitions, 6744 flow [2024-06-21 20:04:18,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6540, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6744, PETRI_PLACES=280, PETRI_TRANSITIONS=399} [2024-06-21 20:04:18,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 20:04:18,756 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 399 transitions, 6744 flow [2024-06-21 20:04:18,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:18,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:18,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:18,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:04:18,756 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:18,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1496936015, now seen corresponding path program 3 times [2024-06-21 20:04:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229360575] [2024-06-21 20:04:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:18,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:18,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:18,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229360575] [2024-06-21 20:04:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229360575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:18,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:18,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385816951] [2024-06-21 20:04:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:18,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:18,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:18,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 399 transitions, 6744 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:18,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:18,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:18,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:19,722 INFO L124 PetriNetUnfolderBase]: 3434/5761 cut-off events. [2024-06-21 20:04:19,723 INFO L125 PetriNetUnfolderBase]: For 443825/443836 co-relation queries the response was YES. [2024-06-21 20:04:19,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41596 conditions, 5761 events. 3434/5761 cut-off events. For 443825/443836 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38481 event pairs, 970 based on Foata normal form. 11/5764 useless extension candidates. Maximal degree in co-relation 41464. Up to 5070 conditions per place. [2024-06-21 20:04:19,802 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 309 selfloop transitions, 104 changer transitions 0/420 dead transitions. [2024-06-21 20:04:19,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 420 transitions, 7914 flow [2024-06-21 20:04:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:04:19,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-21 20:04:19,803 INFO L175 Difference]: Start difference. First operand has 280 places, 399 transitions, 6744 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:04:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 420 transitions, 7914 flow [2024-06-21 20:04:20,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 420 transitions, 7717 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:20,806 INFO L231 Difference]: Finished difference. Result has 283 places, 399 transitions, 6761 flow [2024-06-21 20:04:20,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6761, PETRI_PLACES=283, PETRI_TRANSITIONS=399} [2024-06-21 20:04:20,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 20:04:20,806 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 399 transitions, 6761 flow [2024-06-21 20:04:20,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:20,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:20,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:20,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:04:20,807 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:20,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1497055985, now seen corresponding path program 4 times [2024-06-21 20:04:20,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:20,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252663868] [2024-06-21 20:04:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:20,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252663868] [2024-06-21 20:04:20,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252663868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:20,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:20,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:20,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321190796] [2024-06-21 20:04:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:20,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:20,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:20,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 399 transitions, 6761 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) [2024-06-21 20:04:20,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:20,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:20,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:21,982 INFO L124 PetriNetUnfolderBase]: 3439/5752 cut-off events. [2024-06-21 20:04:21,982 INFO L125 PetriNetUnfolderBase]: For 454474/454474 co-relation queries the response was YES. [2024-06-21 20:04:22,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41729 conditions, 5752 events. 3439/5752 cut-off events. For 454474/454474 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38244 event pairs, 953 based on Foata normal form. 1/5743 useless extension candidates. Maximal degree in co-relation 41597. Up to 5076 conditions per place. [2024-06-21 20:04:22,069 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 303 selfloop transitions, 117 changer transitions 0/427 dead transitions. [2024-06-21 20:04:22,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 427 transitions, 8015 flow [2024-06-21 20:04:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:04:22,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:04:22,071 INFO L175 Difference]: Start difference. First operand has 283 places, 399 transitions, 6761 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:04:22,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 427 transitions, 8015 flow [2024-06-21 20:04:23,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 427 transitions, 7613 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:23,220 INFO L231 Difference]: Finished difference. Result has 283 places, 402 transitions, 6655 flow [2024-06-21 20:04:23,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6655, PETRI_PLACES=283, PETRI_TRANSITIONS=402} [2024-06-21 20:04:23,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 20:04:23,221 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 402 transitions, 6655 flow [2024-06-21 20:04:23,221 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) [2024-06-21 20:04:23,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:23,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:04:23,221 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:23,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash 943767667, now seen corresponding path program 5 times [2024-06-21 20:04:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:23,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226984173] [2024-06-21 20:04:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:23,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:23,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226984173] [2024-06-21 20:04:23,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226984173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:23,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:23,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:23,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851561277] [2024-06-21 20:04:23,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:23,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:23,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:23,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:23,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 402 transitions, 6655 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) [2024-06-21 20:04:23,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:23,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:23,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:24,256 INFO L124 PetriNetUnfolderBase]: 3436/5752 cut-off events. [2024-06-21 20:04:24,256 INFO L125 PetriNetUnfolderBase]: For 458929/458929 co-relation queries the response was YES. [2024-06-21 20:04:24,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41681 conditions, 5752 events. 3436/5752 cut-off events. For 458929/458929 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38289 event pairs, 946 based on Foata normal form. 1/5743 useless extension candidates. Maximal degree in co-relation 41550. Up to 5073 conditions per place. [2024-06-21 20:04:24,327 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 305 selfloop transitions, 112 changer transitions 0/424 dead transitions. [2024-06-21 20:04:24,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 424 transitions, 7991 flow [2024-06-21 20:04:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 20:04:24,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-21 20:04:24,328 INFO L175 Difference]: Start difference. First operand has 283 places, 402 transitions, 6655 flow. Second operand 9 states and 206 transitions. [2024-06-21 20:04:24,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 424 transitions, 7991 flow [2024-06-21 20:04:25,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 424 transitions, 7828 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:25,399 INFO L231 Difference]: Finished difference. Result has 288 places, 402 transitions, 6722 flow [2024-06-21 20:04:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6722, PETRI_PLACES=288, PETRI_TRANSITIONS=402} [2024-06-21 20:04:25,399 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-21 20:04:25,400 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 402 transitions, 6722 flow [2024-06-21 20:04:25,400 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) [2024-06-21 20:04:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:25,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:04:25,400 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:25,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 217646207, now seen corresponding path program 1 times [2024-06-21 20:04:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420785740] [2024-06-21 20:04:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:25,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:25,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420785740] [2024-06-21 20:04:25,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420785740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:25,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:25,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:25,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638995510] [2024-06-21 20:04:25,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:25,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:25,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:25,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:25,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:25,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:25,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 402 transitions, 6722 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) [2024-06-21 20:04:25,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:25,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:25,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:26,456 INFO L124 PetriNetUnfolderBase]: 3446/5765 cut-off events. [2024-06-21 20:04:26,456 INFO L125 PetriNetUnfolderBase]: For 475335/475335 co-relation queries the response was YES. [2024-06-21 20:04:26,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41989 conditions, 5765 events. 3446/5765 cut-off events. For 475335/475335 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 38341 event pairs, 976 based on Foata normal form. 2/5757 useless extension candidates. Maximal degree in co-relation 41856. Up to 4739 conditions per place. [2024-06-21 20:04:26,530 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 210 selfloop transitions, 212 changer transitions 0/429 dead transitions. [2024-06-21 20:04:26,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 429 transitions, 7999 flow [2024-06-21 20:04:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:04:26,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 20:04:26,532 INFO L175 Difference]: Start difference. First operand has 288 places, 402 transitions, 6722 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:04:26,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 429 transitions, 7999 flow [2024-06-21 20:04:27,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 429 transitions, 7737 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:27,730 INFO L231 Difference]: Finished difference. Result has 289 places, 406 transitions, 6966 flow [2024-06-21 20:04:27,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6966, PETRI_PLACES=289, PETRI_TRANSITIONS=406} [2024-06-21 20:04:27,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 20:04:27,731 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 406 transitions, 6966 flow [2024-06-21 20:04:27,731 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) [2024-06-21 20:04:27,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:27,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:27,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:04:27,732 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:27,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 642108981, now seen corresponding path program 2 times [2024-06-21 20:04:27,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:27,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584001287] [2024-06-21 20:04:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:27,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584001287] [2024-06-21 20:04:27,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584001287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:27,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:27,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:27,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837448685] [2024-06-21 20:04:27,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:27,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:27,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:27,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 406 transitions, 6966 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) [2024-06-21 20:04:27,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:27,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:27,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:28,791 INFO L124 PetriNetUnfolderBase]: 3456/5782 cut-off events. [2024-06-21 20:04:28,792 INFO L125 PetriNetUnfolderBase]: For 487304/487304 co-relation queries the response was YES. [2024-06-21 20:04:28,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42610 conditions, 5782 events. 3456/5782 cut-off events. For 487304/487304 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38513 event pairs, 974 based on Foata normal form. 2/5774 useless extension candidates. Maximal degree in co-relation 42477. Up to 4749 conditions per place. [2024-06-21 20:04:28,864 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 217 changer transitions 0/433 dead transitions. [2024-06-21 20:04:28,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 433 transitions, 8263 flow [2024-06-21 20:04:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:04:28,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:04:28,865 INFO L175 Difference]: Start difference. First operand has 289 places, 406 transitions, 6966 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:04:28,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 433 transitions, 8263 flow [2024-06-21 20:04:30,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 433 transitions, 7793 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:30,378 INFO L231 Difference]: Finished difference. Result has 291 places, 410 transitions, 7020 flow [2024-06-21 20:04:30,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7020, PETRI_PLACES=291, PETRI_TRANSITIONS=410} [2024-06-21 20:04:30,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-21 20:04:30,379 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 410 transitions, 7020 flow [2024-06-21 20:04:30,379 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) [2024-06-21 20:04:30,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:30,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:30,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:04:30,380 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:30,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:30,380 INFO L85 PathProgramCache]: Analyzing trace with hash 642131859, now seen corresponding path program 6 times [2024-06-21 20:04:30,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:30,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541480667] [2024-06-21 20:04:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:30,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:30,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:30,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541480667] [2024-06-21 20:04:30,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541480667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:30,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:30,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633780356] [2024-06-21 20:04:30,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:30,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:30,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:30,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 410 transitions, 7020 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) [2024-06-21 20:04:30,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:30,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:30,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:31,351 INFO L124 PetriNetUnfolderBase]: 3453/5786 cut-off events. [2024-06-21 20:04:31,351 INFO L125 PetriNetUnfolderBase]: For 492370/492370 co-relation queries the response was YES. [2024-06-21 20:04:31,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42614 conditions, 5786 events. 3453/5786 cut-off events. For 492370/492370 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38588 event pairs, 946 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 42480. Up to 5098 conditions per place. [2024-06-21 20:04:31,418 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 315 selfloop transitions, 107 changer transitions 0/429 dead transitions. [2024-06-21 20:04:31,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 429 transitions, 8222 flow [2024-06-21 20:04:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:04:31,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:31,419 INFO L175 Difference]: Start difference. First operand has 291 places, 410 transitions, 7020 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:04:31,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 429 transitions, 8222 flow [2024-06-21 20:04:32,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 429 transitions, 7745 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:32,635 INFO L231 Difference]: Finished difference. Result has 292 places, 410 transitions, 6765 flow [2024-06-21 20:04:32,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6543, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6765, PETRI_PLACES=292, PETRI_TRANSITIONS=410} [2024-06-21 20:04:32,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-21 20:04:32,636 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 410 transitions, 6765 flow [2024-06-21 20:04:32,636 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) [2024-06-21 20:04:32,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:32,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:32,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:04:32,637 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:32,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2047076799, now seen corresponding path program 3 times [2024-06-21 20:04:32,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:32,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321284612] [2024-06-21 20:04:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:32,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:32,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:32,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321284612] [2024-06-21 20:04:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321284612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:32,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:32,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:32,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143018534] [2024-06-21 20:04:32,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:32,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:32,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:32,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 410 transitions, 6765 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) [2024-06-21 20:04:32,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:32,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:32,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:33,699 INFO L124 PetriNetUnfolderBase]: 3487/5836 cut-off events. [2024-06-21 20:04:33,699 INFO L125 PetriNetUnfolderBase]: For 516116/516116 co-relation queries the response was YES. [2024-06-21 20:04:33,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43073 conditions, 5836 events. 3487/5836 cut-off events. For 516116/516116 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38986 event pairs, 978 based on Foata normal form. 2/5828 useless extension candidates. Maximal degree in co-relation 42938. Up to 4781 conditions per place. [2024-06-21 20:04:33,780 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 225 selfloop transitions, 211 changer transitions 0/443 dead transitions. [2024-06-21 20:04:33,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 443 transitions, 8372 flow [2024-06-21 20:04:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 20:04:33,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-21 20:04:33,790 INFO L175 Difference]: Start difference. First operand has 292 places, 410 transitions, 6765 flow. Second operand 9 states and 212 transitions. [2024-06-21 20:04:33,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 443 transitions, 8372 flow [2024-06-21 20:04:35,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 443 transitions, 8169 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:35,306 INFO L231 Difference]: Finished difference. Result has 295 places, 420 transitions, 7178 flow [2024-06-21 20:04:35,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7178, PETRI_PLACES=295, PETRI_TRANSITIONS=420} [2024-06-21 20:04:35,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-21 20:04:35,306 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 420 transitions, 7178 flow [2024-06-21 20:04:35,306 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) [2024-06-21 20:04:35,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:35,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:35,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:04:35,307 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:35,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1903436221, now seen corresponding path program 4 times [2024-06-21 20:04:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:35,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900838133] [2024-06-21 20:04:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:35,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:35,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900838133] [2024-06-21 20:04:35,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900838133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:35,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:35,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:35,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580825192] [2024-06-21 20:04:35,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:35,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:35,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:35,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:35,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:35,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 420 transitions, 7178 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) [2024-06-21 20:04:35,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:35,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:36,399 INFO L124 PetriNetUnfolderBase]: 3505/5874 cut-off events. [2024-06-21 20:04:36,400 INFO L125 PetriNetUnfolderBase]: For 534021/534021 co-relation queries the response was YES. [2024-06-21 20:04:36,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43975 conditions, 5874 events. 3505/5874 cut-off events. For 534021/534021 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39346 event pairs, 966 based on Foata normal form. 2/5866 useless extension candidates. Maximal degree in co-relation 43838. Up to 4797 conditions per place. [2024-06-21 20:04:36,475 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 221 changer transitions 0/452 dead transitions. [2024-06-21 20:04:36,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 452 transitions, 8955 flow [2024-06-21 20:04:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 20:04:36,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-21 20:04:36,476 INFO L175 Difference]: Start difference. First operand has 295 places, 420 transitions, 7178 flow. Second operand 9 states and 215 transitions. [2024-06-21 20:04:36,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 452 transitions, 8955 flow [2024-06-21 20:04:38,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 452 transitions, 8556 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:38,331 INFO L231 Difference]: Finished difference. Result has 299 places, 429 transitions, 7423 flow [2024-06-21 20:04:38,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6798, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7423, PETRI_PLACES=299, PETRI_TRANSITIONS=429} [2024-06-21 20:04:38,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-21 20:04:38,332 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 429 transitions, 7423 flow [2024-06-21 20:04:38,332 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) [2024-06-21 20:04:38,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:38,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:38,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:04:38,332 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:38,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:38,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1413756031, now seen corresponding path program 5 times [2024-06-21 20:04:38,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:38,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550280036] [2024-06-21 20:04:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:38,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:38,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:38,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550280036] [2024-06-21 20:04:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550280036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:38,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:38,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:38,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159948731] [2024-06-21 20:04:38,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:38,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:38,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:38,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:38,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 429 transitions, 7423 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) [2024-06-21 20:04:38,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:38,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:39,439 INFO L124 PetriNetUnfolderBase]: 3499/5859 cut-off events. [2024-06-21 20:04:39,439 INFO L125 PetriNetUnfolderBase]: For 541640/541640 co-relation queries the response was YES. [2024-06-21 20:04:39,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43835 conditions, 5859 events. 3499/5859 cut-off events. For 541640/541640 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39113 event pairs, 990 based on Foata normal form. 2/5851 useless extension candidates. Maximal degree in co-relation 43696. Up to 4792 conditions per place. [2024-06-21 20:04:39,514 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 218 changer transitions 0/449 dead transitions. [2024-06-21 20:04:39,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 449 transitions, 8679 flow [2024-06-21 20:04:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:04:39,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:39,516 INFO L175 Difference]: Start difference. First operand has 299 places, 429 transitions, 7423 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:04:39,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 449 transitions, 8679 flow [2024-06-21 20:04:41,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 449 transitions, 8196 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:41,143 INFO L231 Difference]: Finished difference. Result has 302 places, 429 transitions, 7383 flow [2024-06-21 20:04:41,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6940, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7383, PETRI_PLACES=302, PETRI_TRANSITIONS=429} [2024-06-21 20:04:41,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 20:04:41,144 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 429 transitions, 7383 flow [2024-06-21 20:04:41,144 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) [2024-06-21 20:04:41,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:41,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:04:41,145 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:41,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1421384263, now seen corresponding path program 1 times [2024-06-21 20:04:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:41,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5452579] [2024-06-21 20:04:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:41,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:41,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5452579] [2024-06-21 20:04:41,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5452579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:41,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:41,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049187123] [2024-06-21 20:04:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:41,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:41,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:41,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 429 transitions, 7383 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) [2024-06-21 20:04:41,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:41,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:41,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:42,349 INFO L124 PetriNetUnfolderBase]: 3741/6295 cut-off events. [2024-06-21 20:04:42,349 INFO L125 PetriNetUnfolderBase]: For 729048/729048 co-relation queries the response was YES. [2024-06-21 20:04:42,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47472 conditions, 6295 events. 3741/6295 cut-off events. For 729048/729048 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42784 event pairs, 1021 based on Foata normal form. 36/6321 useless extension candidates. Maximal degree in co-relation 47332. Up to 4202 conditions per place. [2024-06-21 20:04:42,426 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 220 changer transitions 0/466 dead transitions. [2024-06-21 20:04:42,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 466 transitions, 9027 flow [2024-06-21 20:04:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:04:42,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:04:42,427 INFO L175 Difference]: Start difference. First operand has 302 places, 429 transitions, 7383 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:04:42,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 466 transitions, 9027 flow [2024-06-21 20:04:44,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 466 transitions, 8577 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:44,285 INFO L231 Difference]: Finished difference. Result has 304 places, 433 transitions, 7523 flow [2024-06-21 20:04:44,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7523, PETRI_PLACES=304, PETRI_TRANSITIONS=433} [2024-06-21 20:04:44,285 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 20:04:44,285 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 433 transitions, 7523 flow [2024-06-21 20:04:44,286 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) [2024-06-21 20:04:44,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:44,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:44,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:04:44,286 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:44,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1119970537, now seen corresponding path program 7 times [2024-06-21 20:04:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:44,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595440677] [2024-06-21 20:04:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:44,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:44,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:44,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595440677] [2024-06-21 20:04:44,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595440677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:44,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:44,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:44,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971152433] [2024-06-21 20:04:44,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:44,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:44,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:44,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 433 transitions, 7523 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) [2024-06-21 20:04:44,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:44,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:44,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:45,566 INFO L124 PetriNetUnfolderBase]: 3873/6537 cut-off events. [2024-06-21 20:04:45,567 INFO L125 PetriNetUnfolderBase]: For 776980/776983 co-relation queries the response was YES. [2024-06-21 20:04:45,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49228 conditions, 6537 events. 3873/6537 cut-off events. For 776980/776983 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 45122 event pairs, 1082 based on Foata normal form. 44/6579 useless extension candidates. Maximal degree in co-relation 49086. Up to 5473 conditions per place. [2024-06-21 20:04:45,648 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 148 changer transitions 3/471 dead transitions. [2024-06-21 20:04:45,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 471 transitions, 9127 flow [2024-06-21 20:04:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:04:45,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-21 20:04:45,649 INFO L175 Difference]: Start difference. First operand has 304 places, 433 transitions, 7523 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:04:45,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 471 transitions, 9127 flow [2024-06-21 20:04:47,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 471 transitions, 8806 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:47,603 INFO L231 Difference]: Finished difference. Result has 308 places, 434 transitions, 7564 flow [2024-06-21 20:04:47,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7202, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7564, PETRI_PLACES=308, PETRI_TRANSITIONS=434} [2024-06-21 20:04:47,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-21 20:04:47,604 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 434 transitions, 7564 flow [2024-06-21 20:04:47,604 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) [2024-06-21 20:04:47,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:47,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:47,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:04:47,605 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:47,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash 671016559, now seen corresponding path program 8 times [2024-06-21 20:04:47,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:47,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861885550] [2024-06-21 20:04:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:47,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861885550] [2024-06-21 20:04:47,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861885550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:47,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:47,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:47,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812057924] [2024-06-21 20:04:47,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:47,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:47,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:47,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:47,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:47,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:47,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 434 transitions, 7564 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) [2024-06-21 20:04:47,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:47,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:47,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:48,987 INFO L124 PetriNetUnfolderBase]: 4098/6932 cut-off events. [2024-06-21 20:04:48,988 INFO L125 PetriNetUnfolderBase]: For 863522/863525 co-relation queries the response was YES. [2024-06-21 20:04:49,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53149 conditions, 6932 events. 4098/6932 cut-off events. For 863522/863525 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 48383 event pairs, 1027 based on Foata normal form. 38/6968 useless extension candidates. Maximal degree in co-relation 53005. Up to 5018 conditions per place. [2024-06-21 20:04:49,085 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 158 changer transitions 4/482 dead transitions. [2024-06-21 20:04:49,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 482 transitions, 9412 flow [2024-06-21 20:04:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 20:04:49,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-06-21 20:04:49,086 INFO L175 Difference]: Start difference. First operand has 308 places, 434 transitions, 7564 flow. Second operand 8 states and 215 transitions. [2024-06-21 20:04:49,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 482 transitions, 9412 flow [2024-06-21 20:04:50,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 482 transitions, 9074 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:50,901 INFO L231 Difference]: Finished difference. Result has 310 places, 435 transitions, 7593 flow [2024-06-21 20:04:50,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7226, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7593, PETRI_PLACES=310, PETRI_TRANSITIONS=435} [2024-06-21 20:04:50,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-21 20:04:50,901 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 435 transitions, 7593 flow [2024-06-21 20:04:50,902 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) [2024-06-21 20:04:50,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:50,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:50,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:04:50,902 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:50,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1130695297, now seen corresponding path program 9 times [2024-06-21 20:04:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:50,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151369392] [2024-06-21 20:04:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:50,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151369392] [2024-06-21 20:04:50,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151369392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:50,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:50,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444448103] [2024-06-21 20:04:50,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:50,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:51,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:51,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 435 transitions, 7593 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) [2024-06-21 20:04:51,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:51,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:51,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:52,284 INFO L124 PetriNetUnfolderBase]: 4108/6957 cut-off events. [2024-06-21 20:04:52,284 INFO L125 PetriNetUnfolderBase]: For 847391/847394 co-relation queries the response was YES. [2024-06-21 20:04:52,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51609 conditions, 6957 events. 4108/6957 cut-off events. For 847391/847394 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48872 event pairs, 1233 based on Foata normal form. 44/6999 useless extension candidates. Maximal degree in co-relation 51464. Up to 5874 conditions per place. [2024-06-21 20:04:52,376 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 321 selfloop transitions, 133 changer transitions 3/464 dead transitions. [2024-06-21 20:04:52,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 464 transitions, 8937 flow [2024-06-21 20:04:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:04:52,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:04:52,378 INFO L175 Difference]: Start difference. First operand has 310 places, 435 transitions, 7593 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:04:52,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 464 transitions, 8937 flow [2024-06-21 20:04:54,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 464 transitions, 8386 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:54,154 INFO L231 Difference]: Finished difference. Result has 311 places, 434 transitions, 7300 flow [2024-06-21 20:04:54,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7042, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7300, PETRI_PLACES=311, PETRI_TRANSITIONS=434} [2024-06-21 20:04:54,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 20:04:54,155 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 434 transitions, 7300 flow [2024-06-21 20:04:54,155 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) [2024-06-21 20:04:54,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:54,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:54,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:04:54,156 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:54,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1655449759, now seen corresponding path program 6 times [2024-06-21 20:04:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964912136] [2024-06-21 20:04:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:54,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964912136] [2024-06-21 20:04:54,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964912136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:54,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:54,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514783863] [2024-06-21 20:04:54,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:54,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:54,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:54,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 434 transitions, 7300 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) [2024-06-21 20:04:54,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:54,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:54,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:55,423 INFO L124 PetriNetUnfolderBase]: 4095/6910 cut-off events. [2024-06-21 20:04:55,423 INFO L125 PetriNetUnfolderBase]: For 707232/707232 co-relation queries the response was YES. [2024-06-21 20:04:55,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50423 conditions, 6910 events. 4095/6910 cut-off events. For 707232/707232 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48390 event pairs, 1244 based on Foata normal form. 1/6904 useless extension candidates. Maximal degree in co-relation 50278. Up to 5791 conditions per place. [2024-06-21 20:04:55,515 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 241 changer transitions 0/457 dead transitions. [2024-06-21 20:04:55,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 457 transitions, 8966 flow [2024-06-21 20:04:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:04:55,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:55,516 INFO L175 Difference]: Start difference. First operand has 311 places, 434 transitions, 7300 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:04:55,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 457 transitions, 8966 flow [2024-06-21 20:04:57,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 457 transitions, 8635 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:57,350 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 7483 flow [2024-06-21 20:04:57,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6969, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7483, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-21 20:04:57,350 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-21 20:04:57,350 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 7483 flow [2024-06-21 20:04:57,350 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) [2024-06-21 20:04:57,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:57,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:57,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:04:57,351 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:57,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:57,351 INFO L85 PathProgramCache]: Analyzing trace with hash 359290027, now seen corresponding path program 7 times [2024-06-21 20:04:57,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:57,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382816838] [2024-06-21 20:04:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:57,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382816838] [2024-06-21 20:04:57,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382816838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:57,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:57,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:57,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360708155] [2024-06-21 20:04:57,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:57,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:57,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:57,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:57,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 7483 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) [2024-06-21 20:04:57,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:57,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:57,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:58,597 INFO L124 PetriNetUnfolderBase]: 3965/6696 cut-off events. [2024-06-21 20:04:58,597 INFO L125 PetriNetUnfolderBase]: For 615588/615588 co-relation queries the response was YES. [2024-06-21 20:04:58,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47391 conditions, 6696 events. 3965/6696 cut-off events. For 615588/615588 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 46596 event pairs, 1186 based on Foata normal form. 1/6690 useless extension candidates. Maximal degree in co-relation 47245. Up to 5584 conditions per place. [2024-06-21 20:04:58,683 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 208 selfloop transitions, 241 changer transitions 0/456 dead transitions. [2024-06-21 20:04:58,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 456 transitions, 8953 flow [2024-06-21 20:04:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:04:58,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:04:58,684 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 7483 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:04:58,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 456 transitions, 8953 flow [2024-06-21 20:05:00,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 456 transitions, 8384 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:00,346 INFO L231 Difference]: Finished difference. Result has 315 places, 435 transitions, 7402 flow [2024-06-21 20:05:00,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7402, PETRI_PLACES=315, PETRI_TRANSITIONS=435} [2024-06-21 20:05:00,347 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-21 20:05:00,347 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 435 transitions, 7402 flow [2024-06-21 20:05:00,347 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) [2024-06-21 20:05:00,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:00,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:00,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:05:00,348 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:00,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1245253967, now seen corresponding path program 8 times [2024-06-21 20:05:00,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:00,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461021020] [2024-06-21 20:05:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:00,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:00,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461021020] [2024-06-21 20:05:00,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461021020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:00,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:00,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:00,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894733142] [2024-06-21 20:05:00,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:00,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:00,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:00,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:00,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:00,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 435 transitions, 7402 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) [2024-06-21 20:05:00,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:00,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:00,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:01,586 INFO L124 PetriNetUnfolderBase]: 3970/6708 cut-off events. [2024-06-21 20:05:01,586 INFO L125 PetriNetUnfolderBase]: For 627070/627070 co-relation queries the response was YES. [2024-06-21 20:05:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47535 conditions, 6708 events. 3970/6708 cut-off events. For 627070/627070 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 46775 event pairs, 1190 based on Foata normal form. 1/6702 useless extension candidates. Maximal degree in co-relation 47388. Up to 5588 conditions per place. [2024-06-21 20:05:01,672 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 254 changer transitions 0/460 dead transitions. [2024-06-21 20:05:01,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 460 transitions, 9132 flow [2024-06-21 20:05:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:05:01,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:05:01,673 INFO L175 Difference]: Start difference. First operand has 315 places, 435 transitions, 7402 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:05:01,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 460 transitions, 9132 flow [2024-06-21 20:05:03,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 460 transitions, 8638 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:03,378 INFO L231 Difference]: Finished difference. Result has 316 places, 438 transitions, 7490 flow [2024-06-21 20:05:03,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7490, PETRI_PLACES=316, PETRI_TRANSITIONS=438} [2024-06-21 20:05:03,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-21 20:05:03,378 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 438 transitions, 7490 flow [2024-06-21 20:05:03,379 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) [2024-06-21 20:05:03,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:03,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:03,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:05:03,379 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:03,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash 852845263, now seen corresponding path program 7 times [2024-06-21 20:05:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:03,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412372761] [2024-06-21 20:05:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:03,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:03,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412372761] [2024-06-21 20:05:03,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412372761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:03,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:03,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:03,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613375070] [2024-06-21 20:05:03,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:03,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:03,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:03,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:03,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:03,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 438 transitions, 7490 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) [2024-06-21 20:05:03,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:03,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:03,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:04,615 INFO L124 PetriNetUnfolderBase]: 3967/6734 cut-off events. [2024-06-21 20:05:04,615 INFO L125 PetriNetUnfolderBase]: For 636828/636831 co-relation queries the response was YES. [2024-06-21 20:05:04,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47640 conditions, 6734 events. 3967/6734 cut-off events. For 636828/636831 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 47100 event pairs, 1210 based on Foata normal form. 3/6728 useless extension candidates. Maximal degree in co-relation 47492. Up to 5954 conditions per place. [2024-06-21 20:05:04,712 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 345 selfloop transitions, 101 changer transitions 0/453 dead transitions. [2024-06-21 20:05:04,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 453 transitions, 8596 flow [2024-06-21 20:05:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 20:05:04,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:05:04,713 INFO L175 Difference]: Start difference. First operand has 316 places, 438 transitions, 7490 flow. Second operand 7 states and 161 transitions. [2024-06-21 20:05:04,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 453 transitions, 8596 flow [2024-06-21 20:05:06,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 453 transitions, 7859 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:06,552 INFO L231 Difference]: Finished difference. Result has 315 places, 438 transitions, 6961 flow [2024-06-21 20:05:06,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6961, PETRI_PLACES=315, PETRI_TRANSITIONS=438} [2024-06-21 20:05:06,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-21 20:05:06,553 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 438 transitions, 6961 flow [2024-06-21 20:05:06,553 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) [2024-06-21 20:05:06,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:06,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:06,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:05:06,553 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:06,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:06,554 INFO L85 PathProgramCache]: Analyzing trace with hash 356337871, now seen corresponding path program 9 times [2024-06-21 20:05:06,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:06,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379235446] [2024-06-21 20:05:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:06,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:06,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:06,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379235446] [2024-06-21 20:05:06,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379235446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:06,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:06,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134039908] [2024-06-21 20:05:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:06,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:06,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 438 transitions, 6961 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) [2024-06-21 20:05:06,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:06,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:06,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:07,952 INFO L124 PetriNetUnfolderBase]: 3964/6694 cut-off events. [2024-06-21 20:05:07,952 INFO L125 PetriNetUnfolderBase]: For 642154/642154 co-relation queries the response was YES. [2024-06-21 20:05:08,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46839 conditions, 6694 events. 3964/6694 cut-off events. For 642154/642154 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 46540 event pairs, 1192 based on Foata normal form. 1/6688 useless extension candidates. Maximal degree in co-relation 46691. Up to 5584 conditions per place. [2024-06-21 20:05:08,031 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 198 selfloop transitions, 254 changer transitions 0/459 dead transitions. [2024-06-21 20:05:08,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 459 transitions, 8455 flow [2024-06-21 20:05:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:05:08,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 20:05:08,032 INFO L175 Difference]: Start difference. First operand has 315 places, 438 transitions, 6961 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:05:08,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 459 transitions, 8455 flow [2024-06-21 20:05:09,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 8274 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:09,813 INFO L231 Difference]: Finished difference. Result has 319 places, 438 transitions, 7294 flow [2024-06-21 20:05:09,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7294, PETRI_PLACES=319, PETRI_TRANSITIONS=438} [2024-06-21 20:05:09,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-21 20:05:09,814 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 438 transitions, 7294 flow [2024-06-21 20:05:09,814 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) [2024-06-21 20:05:09,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:09,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:09,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:05:09,815 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:09,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:09,815 INFO L85 PathProgramCache]: Analyzing trace with hash -249593023, now seen corresponding path program 8 times [2024-06-21 20:05:09,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:09,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346427557] [2024-06-21 20:05:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:09,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:09,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:09,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346427557] [2024-06-21 20:05:09,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346427557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:09,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:09,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:05:09,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905755740] [2024-06-21 20:05:09,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:09,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:05:09,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:05:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:05:09,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:09,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 438 transitions, 7294 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:09,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:09,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:09,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:11,063 INFO L124 PetriNetUnfolderBase]: 3966/6726 cut-off events. [2024-06-21 20:05:11,063 INFO L125 PetriNetUnfolderBase]: For 655693/655696 co-relation queries the response was YES. [2024-06-21 20:05:11,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47436 conditions, 6726 events. 3966/6726 cut-off events. For 655693/655696 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46957 event pairs, 1150 based on Foata normal form. 4/6728 useless extension candidates. Maximal degree in co-relation 47286. Up to 5973 conditions per place. [2024-06-21 20:05:11,153 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 97 changer transitions 0/467 dead transitions. [2024-06-21 20:05:11,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 467 transitions, 8540 flow [2024-06-21 20:05:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:05:11,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:05:11,154 INFO L175 Difference]: Start difference. First operand has 319 places, 438 transitions, 7294 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:05:11,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 467 transitions, 8540 flow [2024-06-21 20:05:13,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 467 transitions, 8016 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:13,073 INFO L231 Difference]: Finished difference. Result has 318 places, 441 transitions, 7056 flow [2024-06-21 20:05:13,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7056, PETRI_PLACES=318, PETRI_TRANSITIONS=441} [2024-06-21 20:05:13,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-21 20:05:13,074 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 441 transitions, 7056 flow [2024-06-21 20:05:13,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:13,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:13,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:13,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:05:13,074 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:13,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:13,075 INFO L85 PathProgramCache]: Analyzing trace with hash 361070671, now seen corresponding path program 10 times [2024-06-21 20:05:13,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:13,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336377532] [2024-06-21 20:05:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:13,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:13,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:13,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336377532] [2024-06-21 20:05:13,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336377532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:13,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:13,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806673991] [2024-06-21 20:05:13,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:13,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:13,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 441 transitions, 7056 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) [2024-06-21 20:05:13,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:13,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:13,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:14,369 INFO L124 PetriNetUnfolderBase]: 3963/6721 cut-off events. [2024-06-21 20:05:14,369 INFO L125 PetriNetUnfolderBase]: For 658754/658754 co-relation queries the response was YES. [2024-06-21 20:05:14,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46986 conditions, 6721 events. 3963/6721 cut-off events. For 658754/658754 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 46883 event pairs, 1140 based on Foata normal form. 1/6721 useless extension candidates. Maximal degree in co-relation 46835. Up to 6193 conditions per place. [2024-06-21 20:05:14,461 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 398 selfloop transitions, 53 changer transitions 0/458 dead transitions. [2024-06-21 20:05:14,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 458 transitions, 8182 flow [2024-06-21 20:05:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 20:05:14,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-21 20:05:14,462 INFO L175 Difference]: Start difference. First operand has 318 places, 441 transitions, 7056 flow. Second operand 9 states and 197 transitions. [2024-06-21 20:05:14,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 458 transitions, 8182 flow [2024-06-21 20:05:16,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 458 transitions, 7952 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:16,583 INFO L231 Difference]: Finished difference. Result has 322 places, 441 transitions, 6940 flow [2024-06-21 20:05:16,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6940, PETRI_PLACES=322, PETRI_TRANSITIONS=441} [2024-06-21 20:05:16,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 20:05:16,584 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 441 transitions, 6940 flow [2024-06-21 20:05:16,584 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) [2024-06-21 20:05:16,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:16,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:16,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:05:16,584 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:16,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1543463573, now seen corresponding path program 9 times [2024-06-21 20:05:16,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:16,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868258868] [2024-06-21 20:05:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:16,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868258868] [2024-06-21 20:05:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868258868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:16,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:16,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:05:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763989591] [2024-06-21 20:05:16,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:16,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:05:16,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:05:16,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:05:16,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:16,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 441 transitions, 6940 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:16,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:16,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:16,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:17,763 INFO L124 PetriNetUnfolderBase]: 3957/6714 cut-off events. [2024-06-21 20:05:17,763 INFO L125 PetriNetUnfolderBase]: For 653584/653587 co-relation queries the response was YES. [2024-06-21 20:05:17,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46481 conditions, 6714 events. 3957/6714 cut-off events. For 653584/653587 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 46923 event pairs, 1149 based on Foata normal form. 4/6716 useless extension candidates. Maximal degree in co-relation 46330. Up to 5963 conditions per place. [2024-06-21 20:05:17,859 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 360 selfloop transitions, 96 changer transitions 0/463 dead transitions. [2024-06-21 20:05:17,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 463 transitions, 7908 flow [2024-06-21 20:05:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:05:17,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 20:05:17,861 INFO L175 Difference]: Start difference. First operand has 322 places, 441 transitions, 6940 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:05:17,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 463 transitions, 7908 flow [2024-06-21 20:05:20,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 463 transitions, 7768 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:20,348 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7008 flow [2024-06-21 20:05:20,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7008, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-21 20:05:20,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-21 20:05:20,348 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7008 flow [2024-06-21 20:05:20,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:20,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:20,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:20,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:05:20,349 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:20,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash 353308891, now seen corresponding path program 11 times [2024-06-21 20:05:20,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:20,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19632374] [2024-06-21 20:05:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:20,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:20,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19632374] [2024-06-21 20:05:20,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19632374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:20,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:20,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532456707] [2024-06-21 20:05:20,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:20,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:20,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7008 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) [2024-06-21 20:05:20,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:20,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:21,626 INFO L124 PetriNetUnfolderBase]: 3954/6709 cut-off events. [2024-06-21 20:05:21,626 INFO L125 PetriNetUnfolderBase]: For 659309/659309 co-relation queries the response was YES. [2024-06-21 20:05:21,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46680 conditions, 6709 events. 3954/6709 cut-off events. For 659309/659309 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 46898 event pairs, 1140 based on Foata normal form. 1/6709 useless extension candidates. Maximal degree in co-relation 46528. Up to 6182 conditions per place. [2024-06-21 20:05:21,719 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 397 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-21 20:05:21,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 457 transitions, 7946 flow [2024-06-21 20:05:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 20:05:21,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-21 20:05:21,720 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7008 flow. Second operand 9 states and 196 transitions. [2024-06-21 20:05:21,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 457 transitions, 7946 flow [2024-06-21 20:05:24,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 457 transitions, 7645 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:24,054 INFO L231 Difference]: Finished difference. Result has 322 places, 441 transitions, 6819 flow [2024-06-21 20:05:24,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6707, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6819, PETRI_PLACES=322, PETRI_TRANSITIONS=441} [2024-06-21 20:05:24,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 20:05:24,054 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 441 transitions, 6819 flow [2024-06-21 20:05:24,054 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) [2024-06-21 20:05:24,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:24,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:24,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:05:24,055 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:24,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash -679316659, now seen corresponding path program 12 times [2024-06-21 20:05:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:24,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184772950] [2024-06-21 20:05:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184772950] [2024-06-21 20:05:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184772950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:24,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:24,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547526447] [2024-06-21 20:05:24,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:24,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:24,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 441 transitions, 6819 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) [2024-06-21 20:05:24,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:24,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:24,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:25,266 INFO L124 PetriNetUnfolderBase]: 3964/6728 cut-off events. [2024-06-21 20:05:25,266 INFO L125 PetriNetUnfolderBase]: For 647830/647833 co-relation queries the response was YES. [2024-06-21 20:05:25,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46301 conditions, 6728 events. 3964/6728 cut-off events. For 647830/647833 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 47108 event pairs, 1149 based on Foata normal form. 4/6730 useless extension candidates. Maximal degree in co-relation 46149. Up to 5849 conditions per place. [2024-06-21 20:05:25,353 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 142 changer transitions 0/471 dead transitions. [2024-06-21 20:05:25,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 471 transitions, 8264 flow [2024-06-21 20:05:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:05:25,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:05:25,354 INFO L175 Difference]: Start difference. First operand has 322 places, 441 transitions, 6819 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:05:25,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 471 transitions, 8264 flow [2024-06-21 20:05:27,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 471 transitions, 8136 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:27,942 INFO L231 Difference]: Finished difference. Result has 322 places, 445 transitions, 7069 flow [2024-06-21 20:05:27,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6691, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7069, PETRI_PLACES=322, PETRI_TRANSITIONS=445} [2024-06-21 20:05:27,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 20:05:27,942 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 445 transitions, 7069 flow [2024-06-21 20:05:27,943 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) [2024-06-21 20:05:27,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:27,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:27,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:05:27,943 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:27,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash 317440363, now seen corresponding path program 13 times [2024-06-21 20:05:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:27,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735688709] [2024-06-21 20:05:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:28,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735688709] [2024-06-21 20:05:28,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735688709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:28,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:28,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:28,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887903100] [2024-06-21 20:05:28,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:28,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:28,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:28,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:28,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:28,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:28,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 445 transitions, 7069 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) [2024-06-21 20:05:28,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:28,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:28,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:29,163 INFO L124 PetriNetUnfolderBase]: 3969/6736 cut-off events. [2024-06-21 20:05:29,163 INFO L125 PetriNetUnfolderBase]: For 658204/658204 co-relation queries the response was YES. [2024-06-21 20:05:29,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46869 conditions, 6736 events. 3969/6736 cut-off events. For 658204/658204 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 47117 event pairs, 1140 based on Foata normal form. 1/6736 useless extension candidates. Maximal degree in co-relation 46716. Up to 5853 conditions per place. [2024-06-21 20:05:29,252 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 315 selfloop transitions, 157 changer transitions 0/479 dead transitions. [2024-06-21 20:05:29,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 479 transitions, 8718 flow [2024-06-21 20:05:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 20:05:29,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:05:29,253 INFO L175 Difference]: Start difference. First operand has 322 places, 445 transitions, 7069 flow. Second operand 9 states and 219 transitions. [2024-06-21 20:05:29,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 479 transitions, 8718 flow [2024-06-21 20:05:31,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 479 transitions, 8394 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:31,807 INFO L231 Difference]: Finished difference. Result has 325 places, 448 transitions, 7140 flow [2024-06-21 20:05:31,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7140, PETRI_PLACES=325, PETRI_TRANSITIONS=448} [2024-06-21 20:05:31,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 20:05:31,808 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 448 transitions, 7140 flow [2024-06-21 20:05:31,808 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) [2024-06-21 20:05:31,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:31,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:31,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:05:31,808 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1130818429, now seen corresponding path program 14 times [2024-06-21 20:05:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861151826] [2024-06-21 20:05:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:31,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:31,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861151826] [2024-06-21 20:05:31,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861151826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:31,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:31,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:31,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062362563] [2024-06-21 20:05:31,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:31,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:31,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:31,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:31,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:31,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 448 transitions, 7140 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) [2024-06-21 20:05:31,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:31,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:31,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:33,132 INFO L124 PetriNetUnfolderBase]: 3971/6742 cut-off events. [2024-06-21 20:05:33,132 INFO L125 PetriNetUnfolderBase]: For 671903/671906 co-relation queries the response was YES. [2024-06-21 20:05:33,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46951 conditions, 6742 events. 3971/6742 cut-off events. For 671903/671906 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 47176 event pairs, 1149 based on Foata normal form. 4/6744 useless extension candidates. Maximal degree in co-relation 46797. Up to 5857 conditions per place. [2024-06-21 20:05:33,217 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 328 selfloop transitions, 141 changer transitions 0/476 dead transitions. [2024-06-21 20:05:33,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 476 transitions, 8773 flow [2024-06-21 20:05:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 20:05:33,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 20:05:33,219 INFO L175 Difference]: Start difference. First operand has 325 places, 448 transitions, 7140 flow. Second operand 9 states and 213 transitions. [2024-06-21 20:05:33,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 476 transitions, 8773 flow [2024-06-21 20:05:36,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 476 transitions, 8478 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:36,049 INFO L231 Difference]: Finished difference. Result has 327 places, 451 transitions, 7211 flow [2024-06-21 20:05:36,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6857, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7211, PETRI_PLACES=327, PETRI_TRANSITIONS=451} [2024-06-21 20:05:36,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-21 20:05:36,049 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 451 transitions, 7211 flow [2024-06-21 20:05:36,049 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) [2024-06-21 20:05:36,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:36,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:36,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:05:36,050 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:36,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1967628913, now seen corresponding path program 15 times [2024-06-21 20:05:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13598754] [2024-06-21 20:05:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:36,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13598754] [2024-06-21 20:05:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13598754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:36,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:36,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:36,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271041334] [2024-06-21 20:05:36,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:36,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:36,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:36,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 451 transitions, 7211 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) [2024-06-21 20:05:36,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:36,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:36,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:37,432 INFO L124 PetriNetUnfolderBase]: 3968/6737 cut-off events. [2024-06-21 20:05:37,433 INFO L125 PetriNetUnfolderBase]: For 663509/663509 co-relation queries the response was YES. [2024-06-21 20:05:37,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46778 conditions, 6737 events. 3968/6737 cut-off events. For 663509/663509 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 47143 event pairs, 1140 based on Foata normal form. 1/6737 useless extension candidates. Maximal degree in co-relation 46624. Up to 5855 conditions per place. [2024-06-21 20:05:37,538 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 165 changer transitions 0/480 dead transitions. [2024-06-21 20:05:37,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 480 transitions, 8417 flow [2024-06-21 20:05:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 20:05:37,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-21 20:05:37,539 INFO L175 Difference]: Start difference. First operand has 327 places, 451 transitions, 7211 flow. Second operand 9 states and 218 transitions. [2024-06-21 20:05:37,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 480 transitions, 8417 flow [2024-06-21 20:05:40,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 480 transitions, 8033 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:40,828 INFO L231 Difference]: Finished difference. Result has 329 places, 451 transitions, 7167 flow [2024-06-21 20:05:40,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7167, PETRI_PLACES=329, PETRI_TRANSITIONS=451} [2024-06-21 20:05:40,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 20:05:40,829 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 451 transitions, 7167 flow [2024-06-21 20:05:40,829 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) [2024-06-21 20:05:40,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:40,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:40,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:05:40,830 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:40,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash 630609733, now seen corresponding path program 2 times [2024-06-21 20:05:40,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:40,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464680001] [2024-06-21 20:05:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:40,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:40,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:40,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464680001] [2024-06-21 20:05:40,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464680001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:40,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:40,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:40,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446601567] [2024-06-21 20:05:40,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:40,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:40,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:40,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:40,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:40,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 451 transitions, 7167 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) [2024-06-21 20:05:40,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:40,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:40,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:42,205 INFO L124 PetriNetUnfolderBase]: 4263/7251 cut-off events. [2024-06-21 20:05:42,205 INFO L125 PetriNetUnfolderBase]: For 958651/958654 co-relation queries the response was YES. [2024-06-21 20:05:42,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51887 conditions, 7251 events. 4263/7251 cut-off events. For 958651/958654 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 51419 event pairs, 980 based on Foata normal form. 44/7293 useless extension candidates. Maximal degree in co-relation 51732. Up to 5547 conditions per place. [2024-06-21 20:05:42,298 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 110 changer transitions 0/496 dead transitions. [2024-06-21 20:05:42,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 496 transitions, 8613 flow [2024-06-21 20:05:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 20:05:42,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-21 20:05:42,299 INFO L175 Difference]: Start difference. First operand has 329 places, 451 transitions, 7167 flow. Second operand 7 states and 190 transitions. [2024-06-21 20:05:42,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 496 transitions, 8613 flow [2024-06-21 20:05:45,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 496 transitions, 8159 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 20:05:45,530 INFO L231 Difference]: Finished difference. Result has 327 places, 457 transitions, 7128 flow [2024-06-21 20:05:45,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7128, PETRI_PLACES=327, PETRI_TRANSITIONS=457} [2024-06-21 20:05:45,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-21 20:05:45,531 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 457 transitions, 7128 flow [2024-06-21 20:05:45,531 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) [2024-06-21 20:05:45,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:45,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:45,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:05:45,532 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:45,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1073438533, now seen corresponding path program 3 times [2024-06-21 20:05:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:45,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300629587] [2024-06-21 20:05:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300629587] [2024-06-21 20:05:45,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300629587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:45,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:45,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:45,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702073130] [2024-06-21 20:05:45,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:45,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:45,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:45,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:45,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 457 transitions, 7128 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) [2024-06-21 20:05:45,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:45,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:45,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:47,249 INFO L124 PetriNetUnfolderBase]: 4771/8135 cut-off events. [2024-06-21 20:05:47,249 INFO L125 PetriNetUnfolderBase]: For 1218145/1218148 co-relation queries the response was YES. [2024-06-21 20:05:47,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62221 conditions, 8135 events. 4771/8135 cut-off events. For 1218145/1218148 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58924 event pairs, 1118 based on Foata normal form. 44/8177 useless extension candidates. Maximal degree in co-relation 62066. Up to 4357 conditions per place. [2024-06-21 20:05:47,342 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 388 selfloop transitions, 114 changer transitions 0/509 dead transitions. [2024-06-21 20:05:47,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 509 transitions, 8888 flow [2024-06-21 20:05:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 20:05:47,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6892857142857143 [2024-06-21 20:05:47,344 INFO L175 Difference]: Start difference. First operand has 327 places, 457 transitions, 7128 flow. Second operand 7 states and 193 transitions. [2024-06-21 20:05:47,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 509 transitions, 8888 flow [2024-06-21 20:05:51,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 509 transitions, 8684 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:51,151 INFO L231 Difference]: Finished difference. Result has 332 places, 465 transitions, 7449 flow [2024-06-21 20:05:51,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6932, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7449, PETRI_PLACES=332, PETRI_TRANSITIONS=465} [2024-06-21 20:05:51,152 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-21 20:05:51,152 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 465 transitions, 7449 flow [2024-06-21 20:05:51,152 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) [2024-06-21 20:05:51,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:51,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:51,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:05:51,153 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:51,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:51,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1131095011, now seen corresponding path program 4 times [2024-06-21 20:05:51,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:51,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692233382] [2024-06-21 20:05:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:51,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:51,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692233382] [2024-06-21 20:05:51,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692233382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:51,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:51,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077565104] [2024-06-21 20:05:51,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:51,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:51,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 465 transitions, 7449 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) [2024-06-21 20:05:51,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:51,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:51,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:52,909 INFO L124 PetriNetUnfolderBase]: 4954/8486 cut-off events. [2024-06-21 20:05:52,909 INFO L125 PetriNetUnfolderBase]: For 1242462/1242465 co-relation queries the response was YES. [2024-06-21 20:05:53,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65283 conditions, 8486 events. 4954/8486 cut-off events. For 1242462/1242465 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 62738 event pairs, 1568 based on Foata normal form. 38/8522 useless extension candidates. Maximal degree in co-relation 65125. Up to 6677 conditions per place. [2024-06-21 20:05:53,028 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 354 selfloop transitions, 143 changer transitions 0/504 dead transitions. [2024-06-21 20:05:53,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 504 transitions, 9225 flow [2024-06-21 20:05:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:05:53,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-21 20:05:53,029 INFO L175 Difference]: Start difference. First operand has 332 places, 465 transitions, 7449 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:05:53,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 504 transitions, 9225 flow [2024-06-21 20:05:57,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 504 transitions, 9033 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-21 20:05:57,088 INFO L231 Difference]: Finished difference. Result has 338 places, 468 transitions, 7670 flow [2024-06-21 20:05:57,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7267, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7670, PETRI_PLACES=338, PETRI_TRANSITIONS=468} [2024-06-21 20:05:57,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-21 20:05:57,089 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 468 transitions, 7670 flow [2024-06-21 20:05:57,090 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) [2024-06-21 20:05:57,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:57,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:57,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:05:57,090 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:57,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 267633169, now seen corresponding path program 1 times [2024-06-21 20:05:57,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:57,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181225769] [2024-06-21 20:05:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:57,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181225769] [2024-06-21 20:05:57,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181225769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:57,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:57,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:57,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280512352] [2024-06-21 20:05:57,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:57,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:57,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:57,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:57,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:57,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 468 transitions, 7670 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) [2024-06-21 20:05:57,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:57,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:57,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:58,911 INFO L124 PetriNetUnfolderBase]: 5235/8958 cut-off events. [2024-06-21 20:05:58,911 INFO L125 PetriNetUnfolderBase]: For 1406608/1406608 co-relation queries the response was YES. [2024-06-21 20:05:59,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70530 conditions, 8958 events. 5235/8958 cut-off events. For 1406608/1406608 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 67246 event pairs, 1657 based on Foata normal form. 36/8987 useless extension candidates. Maximal degree in co-relation 70370. Up to 6372 conditions per place. [2024-06-21 20:05:59,040 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 211 selfloop transitions, 285 changer transitions 7/510 dead transitions. [2024-06-21 20:05:59,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 510 transitions, 9292 flow [2024-06-21 20:05:59,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:05:59,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-21 20:05:59,041 INFO L175 Difference]: Start difference. First operand has 338 places, 468 transitions, 7670 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:05:59,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 510 transitions, 9292 flow [2024-06-21 20:06:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 510 transitions, 9044 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:04,522 INFO L231 Difference]: Finished difference. Result has 342 places, 470 transitions, 8053 flow [2024-06-21 20:06:04,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8053, PETRI_PLACES=342, PETRI_TRANSITIONS=470} [2024-06-21 20:06:04,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-21 20:06:04,523 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 470 transitions, 8053 flow [2024-06-21 20:06:04,523 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) [2024-06-21 20:06:04,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:04,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:04,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:06:04,524 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:04,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash -814893757, now seen corresponding path program 2 times [2024-06-21 20:06:04,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:04,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689931732] [2024-06-21 20:06:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:04,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:04,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689931732] [2024-06-21 20:06:04,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689931732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:04,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:04,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633385699] [2024-06-21 20:06:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:04,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:04,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:04,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 470 transitions, 8053 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) [2024-06-21 20:06:04,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:04,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:04,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:06,349 INFO L124 PetriNetUnfolderBase]: 5512/9405 cut-off events. [2024-06-21 20:06:06,350 INFO L125 PetriNetUnfolderBase]: For 1627945/1627945 co-relation queries the response was YES. [2024-06-21 20:06:06,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77363 conditions, 9405 events. 5512/9405 cut-off events. For 1627945/1627945 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 70961 event pairs, 1983 based on Foata normal form. 36/9434 useless extension candidates. Maximal degree in co-relation 77201. Up to 7574 conditions per place. [2024-06-21 20:06:06,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 271 changer transitions 4/506 dead transitions. [2024-06-21 20:06:06,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 506 transitions, 9671 flow [2024-06-21 20:06:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:06:06,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:06:06,488 INFO L175 Difference]: Start difference. First operand has 342 places, 470 transitions, 8053 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:06:06,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 506 transitions, 9671 flow [2024-06-21 20:06:11,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 506 transitions, 8898 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:11,167 INFO L231 Difference]: Finished difference. Result has 344 places, 473 transitions, 7934 flow [2024-06-21 20:06:11,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7934, PETRI_PLACES=344, PETRI_TRANSITIONS=473} [2024-06-21 20:06:11,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 20:06:11,168 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 473 transitions, 7934 flow [2024-06-21 20:06:11,168 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) [2024-06-21 20:06:11,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:11,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:11,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:06:11,168 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:11,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1244829329, now seen corresponding path program 3 times [2024-06-21 20:06:11,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:11,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266304145] [2024-06-21 20:06:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266304145] [2024-06-21 20:06:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266304145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:11,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:11,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795268690] [2024-06-21 20:06:11,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:11,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:11,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:11,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:11,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 473 transitions, 7934 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) [2024-06-21 20:06:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:11,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:12,969 INFO L124 PetriNetUnfolderBase]: 5395/9230 cut-off events. [2024-06-21 20:06:12,970 INFO L125 PetriNetUnfolderBase]: For 1488440/1488440 co-relation queries the response was YES. [2024-06-21 20:06:13,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71880 conditions, 9230 events. 5395/9230 cut-off events. For 1488440/1488440 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 69637 event pairs, 1982 based on Foata normal form. 42/9265 useless extension candidates. Maximal degree in co-relation 71718. Up to 7736 conditions per place. [2024-06-21 20:06:13,112 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 266 changer transitions 3/498 dead transitions. [2024-06-21 20:06:13,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 498 transitions, 9188 flow [2024-06-21 20:06:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:06:13,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:06:13,114 INFO L175 Difference]: Start difference. First operand has 344 places, 473 transitions, 7934 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:06:13,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 498 transitions, 9188 flow [2024-06-21 20:06:18,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 498 transitions, 8767 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:18,132 INFO L231 Difference]: Finished difference. Result has 348 places, 472 transitions, 8039 flow [2024-06-21 20:06:18,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7513, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8039, PETRI_PLACES=348, PETRI_TRANSITIONS=472} [2024-06-21 20:06:18,132 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-21 20:06:18,132 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 472 transitions, 8039 flow [2024-06-21 20:06:18,133 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) [2024-06-21 20:06:18,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:18,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:18,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:06:18,133 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:18,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1535686913, now seen corresponding path program 4 times [2024-06-21 20:06:18,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:18,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882404308] [2024-06-21 20:06:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882404308] [2024-06-21 20:06:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882404308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:18,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61166056] [2024-06-21 20:06:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:18,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:18,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:18,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 472 transitions, 8039 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) [2024-06-21 20:06:18,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:18,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:18,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:20,022 INFO L124 PetriNetUnfolderBase]: 5441/9340 cut-off events. [2024-06-21 20:06:20,022 INFO L125 PetriNetUnfolderBase]: For 1393217/1393217 co-relation queries the response was YES. [2024-06-21 20:06:20,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72949 conditions, 9340 events. 5441/9340 cut-off events. For 1393217/1393217 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 70829 event pairs, 1907 based on Foata normal form. 16/9355 useless extension candidates. Maximal degree in co-relation 72785. Up to 8551 conditions per place. [2024-06-21 20:06:20,156 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 55 changer transitions 0/494 dead transitions. [2024-06-21 20:06:20,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 494 transitions, 9125 flow [2024-06-21 20:06:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 20:06:20,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 20:06:20,158 INFO L175 Difference]: Start difference. First operand has 348 places, 472 transitions, 8039 flow. Second operand 9 states and 199 transitions. [2024-06-21 20:06:20,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 494 transitions, 9125 flow [2024-06-21 20:06:25,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 494 transitions, 8585 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:25,007 INFO L231 Difference]: Finished difference. Result has 350 places, 474 transitions, 7669 flow [2024-06-21 20:06:25,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7499, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7669, PETRI_PLACES=350, PETRI_TRANSITIONS=474} [2024-06-21 20:06:25,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-21 20:06:25,008 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 474 transitions, 7669 flow [2024-06-21 20:06:25,008 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) [2024-06-21 20:06:25,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:25,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:25,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:06:25,008 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:25,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:25,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1965918225, now seen corresponding path program 5 times [2024-06-21 20:06:25,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:25,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268117342] [2024-06-21 20:06:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:25,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:25,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268117342] [2024-06-21 20:06:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268117342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:25,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:25,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:25,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375518213] [2024-06-21 20:06:25,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:25,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:25,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:25,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:25,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 474 transitions, 7669 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) [2024-06-21 20:06:25,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:25,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:25,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:27,037 INFO L124 PetriNetUnfolderBase]: 5527/9474 cut-off events. [2024-06-21 20:06:27,038 INFO L125 PetriNetUnfolderBase]: For 1444494/1444494 co-relation queries the response was YES. [2024-06-21 20:06:27,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74344 conditions, 9474 events. 5527/9474 cut-off events. For 1444494/1444494 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 71879 event pairs, 1899 based on Foata normal form. 12/9485 useless extension candidates. Maximal degree in co-relation 74179. Up to 8511 conditions per place. [2024-06-21 20:06:27,167 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 62 changer transitions 0/501 dead transitions. [2024-06-21 20:06:27,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 501 transitions, 9017 flow [2024-06-21 20:06:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 20:06:27,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-21 20:06:27,168 INFO L175 Difference]: Start difference. First operand has 350 places, 474 transitions, 7669 flow. Second operand 9 states and 202 transitions. [2024-06-21 20:06:27,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 501 transitions, 9017 flow [2024-06-21 20:06:32,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 501 transitions, 8877 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:32,872 INFO L231 Difference]: Finished difference. Result has 352 places, 477 transitions, 7746 flow [2024-06-21 20:06:32,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7529, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7746, PETRI_PLACES=352, PETRI_TRANSITIONS=477} [2024-06-21 20:06:32,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-21 20:06:32,873 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 477 transitions, 7746 flow [2024-06-21 20:06:32,873 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) [2024-06-21 20:06:32,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:32,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:32,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:06:32,873 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:32,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1960192773, now seen corresponding path program 1 times [2024-06-21 20:06:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076391338] [2024-06-21 20:06:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:32,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:32,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:32,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076391338] [2024-06-21 20:06:32,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076391338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:32,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:32,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:32,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380047096] [2024-06-21 20:06:32,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:32,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:32,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:32,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:33,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:33,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 477 transitions, 7746 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) [2024-06-21 20:06:33,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:33,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:33,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:34,920 INFO L124 PetriNetUnfolderBase]: 5692/9699 cut-off events. [2024-06-21 20:06:34,920 INFO L125 PetriNetUnfolderBase]: For 1572529/1572529 co-relation queries the response was YES. [2024-06-21 20:06:35,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78384 conditions, 9699 events. 5692/9699 cut-off events. For 1572529/1572529 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 73406 event pairs, 1933 based on Foata normal form. 12/9710 useless extension candidates. Maximal degree in co-relation 78218. Up to 8757 conditions per place. [2024-06-21 20:06:35,052 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 39 changer transitions 0/507 dead transitions. [2024-06-21 20:06:35,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 507 transitions, 9175 flow [2024-06-21 20:06:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 20:06:35,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 20:06:35,054 INFO L175 Difference]: Start difference. First operand has 352 places, 477 transitions, 7746 flow. Second operand 9 states and 199 transitions. [2024-06-21 20:06:35,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 507 transitions, 9175 flow [2024-06-21 20:06:41,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 507 transitions, 9069 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:41,395 INFO L231 Difference]: Finished difference. Result has 357 places, 483 transitions, 7904 flow [2024-06-21 20:06:41,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7640, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7904, PETRI_PLACES=357, PETRI_TRANSITIONS=483} [2024-06-21 20:06:41,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-21 20:06:41,395 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 483 transitions, 7904 flow [2024-06-21 20:06:41,396 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) [2024-06-21 20:06:41,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:41,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:41,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:06:41,396 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:41,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1967619985, now seen corresponding path program 6 times [2024-06-21 20:06:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:41,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657975236] [2024-06-21 20:06:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:41,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:41,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:41,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657975236] [2024-06-21 20:06:41,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657975236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:41,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:41,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:41,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284554246] [2024-06-21 20:06:41,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:41,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:41,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:41,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:41,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:41,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:41,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 483 transitions, 7904 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) [2024-06-21 20:06:41,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:41,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:41,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:43,536 INFO L124 PetriNetUnfolderBase]: 5811/9940 cut-off events. [2024-06-21 20:06:43,536 INFO L125 PetriNetUnfolderBase]: For 1745912/1745912 co-relation queries the response was YES. [2024-06-21 20:06:43,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79744 conditions, 9940 events. 5811/9940 cut-off events. For 1745912/1745912 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 75975 event pairs, 2027 based on Foata normal form. 42/9981 useless extension candidates. Maximal degree in co-relation 79575. Up to 8592 conditions per place. [2024-06-21 20:06:43,673 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 343 selfloop transitions, 167 changer transitions 3/520 dead transitions. [2024-06-21 20:06:43,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 520 transitions, 9294 flow [2024-06-21 20:06:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 20:06:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-06-21 20:06:43,674 INFO L175 Difference]: Start difference. First operand has 357 places, 483 transitions, 7904 flow. Second operand 9 states and 223 transitions. [2024-06-21 20:06:43,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 520 transitions, 9294 flow [2024-06-21 20:06:49,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 520 transitions, 9185 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:49,260 INFO L231 Difference]: Finished difference. Result has 362 places, 484 transitions, 8184 flow [2024-06-21 20:06:49,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8184, PETRI_PLACES=362, PETRI_TRANSITIONS=484} [2024-06-21 20:06:49,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-21 20:06:49,260 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 484 transitions, 8184 flow [2024-06-21 20:06:49,260 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) [2024-06-21 20:06:49,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:49,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:49,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:06:49,261 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:49,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1967767855, now seen corresponding path program 7 times [2024-06-21 20:06:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:49,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023221851] [2024-06-21 20:06:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023221851] [2024-06-21 20:06:49,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023221851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:49,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:49,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:49,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692888627] [2024-06-21 20:06:49,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:49,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:49,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:49,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:49,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:49,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 484 transitions, 8184 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) [2024-06-21 20:06:49,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:49,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:49,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:51,476 INFO L124 PetriNetUnfolderBase]: 6049/10354 cut-off events. [2024-06-21 20:06:51,477 INFO L125 PetriNetUnfolderBase]: For 1894820/1894820 co-relation queries the response was YES. [2024-06-21 20:06:51,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84722 conditions, 10354 events. 6049/10354 cut-off events. For 1894820/1894820 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 79817 event pairs, 1903 based on Foata normal form. 36/10389 useless extension candidates. Maximal degree in co-relation 84552. Up to 8039 conditions per place. [2024-06-21 20:06:51,618 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 337 selfloop transitions, 183 changer transitions 4/531 dead transitions. [2024-06-21 20:06:51,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 531 transitions, 9854 flow [2024-06-21 20:06:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 20:06:51,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-21 20:06:51,620 INFO L175 Difference]: Start difference. First operand has 362 places, 484 transitions, 8184 flow. Second operand 9 states and 232 transitions. [2024-06-21 20:06:51,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 531 transitions, 9854 flow [2024-06-21 20:07:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 531 transitions, 9566 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:00,400 INFO L231 Difference]: Finished difference. Result has 365 places, 485 transitions, 8305 flow [2024-06-21 20:07:00,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8305, PETRI_PLACES=365, PETRI_TRANSITIONS=485} [2024-06-21 20:07:00,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 20:07:00,401 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 485 transitions, 8305 flow [2024-06-21 20:07:00,401 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) [2024-06-21 20:07:00,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:00,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:00,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:07:00,401 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:00,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash 807925951, now seen corresponding path program 2 times [2024-06-21 20:07:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:00,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660006705] [2024-06-21 20:07:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:00,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:00,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660006705] [2024-06-21 20:07:00,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660006705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:00,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:00,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:00,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829816439] [2024-06-21 20:07:00,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:00,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:00,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:00,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 485 transitions, 8305 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) [2024-06-21 20:07:00,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:00,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:00,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:02,673 INFO L124 PetriNetUnfolderBase]: 6301/10772 cut-off events. [2024-06-21 20:07:02,673 INFO L125 PetriNetUnfolderBase]: For 2069176/2069176 co-relation queries the response was YES. [2024-06-21 20:07:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89784 conditions, 10772 events. 6301/10772 cut-off events. For 2069176/2069176 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 83555 event pairs, 1864 based on Foata normal form. 42/10809 useless extension candidates. Maximal degree in co-relation 89613. Up to 8516 conditions per place. [2024-06-21 20:07:02,834 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 401 selfloop transitions, 128 changer transitions 0/536 dead transitions. [2024-06-21 20:07:02,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 536 transitions, 9907 flow [2024-06-21 20:07:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 20:07:02,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-21 20:07:02,835 INFO L175 Difference]: Start difference. First operand has 365 places, 485 transitions, 8305 flow. Second operand 8 states and 213 transitions. [2024-06-21 20:07:02,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 536 transitions, 9907 flow [2024-06-21 20:07:11,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 536 transitions, 9548 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:11,234 INFO L231 Difference]: Finished difference. Result has 368 places, 493 transitions, 8480 flow [2024-06-21 20:07:11,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7952, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8480, PETRI_PLACES=368, PETRI_TRANSITIONS=493} [2024-06-21 20:07:11,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 20:07:11,235 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 493 transitions, 8480 flow [2024-06-21 20:07:11,235 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) [2024-06-21 20:07:11,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:11,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:11,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:07:11,235 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:11,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1073623231, now seen corresponding path program 3 times [2024-06-21 20:07:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866077762] [2024-06-21 20:07:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866077762] [2024-06-21 20:07:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866077762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:11,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673112170] [2024-06-21 20:07:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:11,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:11,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 493 transitions, 8480 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) [2024-06-21 20:07:11,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:11,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:11,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:13,505 INFO L124 PetriNetUnfolderBase]: 6399/10993 cut-off events. [2024-06-21 20:07:13,505 INFO L125 PetriNetUnfolderBase]: For 1995402/1995405 co-relation queries the response was YES. [2024-06-21 20:07:13,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89786 conditions, 10993 events. 6399/10993 cut-off events. For 1995402/1995405 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 85340 event pairs, 1819 based on Foata normal form. 44/11035 useless extension candidates. Maximal degree in co-relation 89613. Up to 6224 conditions per place. [2024-06-21 20:07:13,714 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 114 changer transitions 0/538 dead transitions. [2024-06-21 20:07:13,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 538 transitions, 10172 flow [2024-06-21 20:07:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:07:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:07:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 20:07:13,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6892857142857143 [2024-06-21 20:07:13,715 INFO L175 Difference]: Start difference. First operand has 368 places, 493 transitions, 8480 flow. Second operand 7 states and 193 transitions. [2024-06-21 20:07:13,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 538 transitions, 10172 flow [2024-06-21 20:07:21,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 538 transitions, 9896 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:21,314 INFO L231 Difference]: Finished difference. Result has 369 places, 495 transitions, 8510 flow [2024-06-21 20:07:21,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8214, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8510, PETRI_PLACES=369, PETRI_TRANSITIONS=495} [2024-06-21 20:07:21,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 20:07:21,315 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 495 transitions, 8510 flow [2024-06-21 20:07:21,315 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) [2024-06-21 20:07:21,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:21,315 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] [2024-06-21 20:07:21,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:07:21,316 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:21,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1969236474, now seen corresponding path program 1 times [2024-06-21 20:07:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:21,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598276872] [2024-06-21 20:07:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:21,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:21,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598276872] [2024-06-21 20:07:21,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598276872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:21,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:21,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:07:21,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745102023] [2024-06-21 20:07:21,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:21,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:07:21,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:21,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:07:21,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:07:21,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:21,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 495 transitions, 8510 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) [2024-06-21 20:07:21,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:21,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:21,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:23,571 INFO L124 PetriNetUnfolderBase]: 6466/11071 cut-off events. [2024-06-21 20:07:23,571 INFO L125 PetriNetUnfolderBase]: For 1818795/1818795 co-relation queries the response was YES. [2024-06-21 20:07:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90700 conditions, 11071 events. 6466/11071 cut-off events. For 1818795/1818795 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 86168 event pairs, 2143 based on Foata normal form. 2/11060 useless extension candidates. Maximal degree in co-relation 90527. Up to 9435 conditions per place. [2024-06-21 20:07:23,742 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 125 changer transitions 0/536 dead transitions. [2024-06-21 20:07:23,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 536 transitions, 10307 flow [2024-06-21 20:07:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:07:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:07:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:07:23,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 20:07:23,743 INFO L175 Difference]: Start difference. First operand has 369 places, 495 transitions, 8510 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:07:23,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 536 transitions, 10307 flow [2024-06-21 20:07:30,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 536 transitions, 10037 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:30,749 INFO L231 Difference]: Finished difference. Result has 373 places, 503 transitions, 8732 flow [2024-06-21 20:07:30,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8252, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8732, PETRI_PLACES=373, PETRI_TRANSITIONS=503} [2024-06-21 20:07:30,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 20:07:30,750 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 503 transitions, 8732 flow [2024-06-21 20:07:30,750 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) [2024-06-21 20:07:30,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:30,750 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] [2024-06-21 20:07:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:07:30,751 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:30,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash 290755956, now seen corresponding path program 2 times [2024-06-21 20:07:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:30,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666306900] [2024-06-21 20:07:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:30,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:30,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666306900] [2024-06-21 20:07:30,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666306900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:30,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:30,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:07:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376368647] [2024-06-21 20:07:30,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:07:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:30,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:07:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:07:30,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:30,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 503 transitions, 8732 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) [2024-06-21 20:07:30,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:30,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:30,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:33,586 INFO L124 PetriNetUnfolderBase]: 6533/11180 cut-off events. [2024-06-21 20:07:33,587 INFO L125 PetriNetUnfolderBase]: For 1870413/1870413 co-relation queries the response was YES. [2024-06-21 20:07:33,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91992 conditions, 11180 events. 6533/11180 cut-off events. For 1870413/1870413 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 87094 event pairs, 2120 based on Foata normal form. 2/11169 useless extension candidates. Maximal degree in co-relation 91818. Up to 9479 conditions per place. [2024-06-21 20:07:33,830 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 129 changer transitions 1/541 dead transitions. [2024-06-21 20:07:33,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 541 transitions, 10505 flow [2024-06-21 20:07:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:07:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:07:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:07:33,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:07:33,841 INFO L175 Difference]: Start difference. First operand has 373 places, 503 transitions, 8732 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:07:33,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 541 transitions, 10505 flow [2024-06-21 20:07:41,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 541 transitions, 10294 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 20:07:41,521 INFO L231 Difference]: Finished difference. Result has 378 places, 507 transitions, 8876 flow [2024-06-21 20:07:41,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8547, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8876, PETRI_PLACES=378, PETRI_TRANSITIONS=507} [2024-06-21 20:07:41,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 20:07:41,522 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 507 transitions, 8876 flow [2024-06-21 20:07:41,522 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) [2024-06-21 20:07:41,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:41,523 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] [2024-06-21 20:07:41,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:07:41,523 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:41,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2027328924, now seen corresponding path program 3 times [2024-06-21 20:07:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194791507] [2024-06-21 20:07:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:41,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:41,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194791507] [2024-06-21 20:07:41,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194791507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:41,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:41,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:07:41,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621241387] [2024-06-21 20:07:41,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:41,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:07:41,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:07:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:07:41,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:41,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 507 transitions, 8876 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) [2024-06-21 20:07:41,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:41,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:41,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:44,516 INFO L124 PetriNetUnfolderBase]: 6528/11195 cut-off events. [2024-06-21 20:07:44,517 INFO L125 PetriNetUnfolderBase]: For 1897125/1897125 co-relation queries the response was YES. [2024-06-21 20:07:44,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92492 conditions, 11195 events. 6528/11195 cut-off events. For 1897125/1897125 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 87821 event pairs, 2448 based on Foata normal form. 2/11179 useless extension candidates. Maximal degree in co-relation 92316. Up to 10095 conditions per place. [2024-06-21 20:07:44,685 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 414 selfloop transitions, 115 changer transitions 0/536 dead transitions. [2024-06-21 20:07:44,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 536 transitions, 10252 flow [2024-06-21 20:07:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:07:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:07:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:07:44,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:07:44,686 INFO L175 Difference]: Start difference. First operand has 378 places, 507 transitions, 8876 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:07:44,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 536 transitions, 10252 flow [2024-06-21 20:07:52,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 536 transitions, 10025 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:07:52,168 INFO L231 Difference]: Finished difference. Result has 383 places, 510 transitions, 8950 flow [2024-06-21 20:07:52,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8654, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8950, PETRI_PLACES=383, PETRI_TRANSITIONS=510} [2024-06-21 20:07:52,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 20:07:52,169 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 510 transitions, 8950 flow [2024-06-21 20:07:52,169 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) [2024-06-21 20:07:52,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:52,170 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] [2024-06-21 20:07:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:07:52,171 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:52,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash 428378618, now seen corresponding path program 4 times [2024-06-21 20:07:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903238511] [2024-06-21 20:07:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:52,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903238511] [2024-06-21 20:07:52,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903238511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:52,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:52,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:07:52,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822890401] [2024-06-21 20:07:52,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:52,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:07:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:07:52,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:07:52,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:52,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 510 transitions, 8950 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) [2024-06-21 20:07:52,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:52,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:52,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:54,897 INFO L124 PetriNetUnfolderBase]: 6536/11215 cut-off events. [2024-06-21 20:07:54,898 INFO L125 PetriNetUnfolderBase]: For 1933254/1933254 co-relation queries the response was YES. [2024-06-21 20:07:55,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92856 conditions, 11215 events. 6536/11215 cut-off events. For 1933254/1933254 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 88113 event pairs, 2458 based on Foata normal form. 2/11207 useless extension candidates. Maximal degree in co-relation 92678. Up to 10147 conditions per place. [2024-06-21 20:07:55,195 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 416 selfloop transitions, 110 changer transitions 0/533 dead transitions. [2024-06-21 20:07:55,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 533 transitions, 10104 flow [2024-06-21 20:07:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:07:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:07:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:07:55,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:07:55,196 INFO L175 Difference]: Start difference. First operand has 383 places, 510 transitions, 8950 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:07:55,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 533 transitions, 10104 flow [2024-06-21 20:08:02,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 533 transitions, 9813 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 20:08:02,941 INFO L231 Difference]: Finished difference. Result has 386 places, 512 transitions, 8938 flow [2024-06-21 20:08:02,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8679, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8938, PETRI_PLACES=386, PETRI_TRANSITIONS=512} [2024-06-21 20:08:02,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-21 20:08:02,942 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 512 transitions, 8938 flow [2024-06-21 20:08:02,942 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) [2024-06-21 20:08:02,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:02,943 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] [2024-06-21 20:08:02,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:08:02,943 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:02,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1621691932, now seen corresponding path program 5 times [2024-06-21 20:08:02,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:02,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804756540] [2024-06-21 20:08:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:02,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804756540] [2024-06-21 20:08:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804756540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:03,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:03,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:03,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032236673] [2024-06-21 20:08:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:03,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:03,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:03,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 512 transitions, 8938 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) [2024-06-21 20:08:03,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:03,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:03,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:05,774 INFO L124 PetriNetUnfolderBase]: 6531/11208 cut-off events. [2024-06-21 20:08:05,784 INFO L125 PetriNetUnfolderBase]: For 1957440/1957440 co-relation queries the response was YES. [2024-06-21 20:08:05,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92775 conditions, 11208 events. 6531/11208 cut-off events. For 1957440/1957440 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 88021 event pairs, 2457 based on Foata normal form. 2/11200 useless extension candidates. Maximal degree in co-relation 92596. Up to 10140 conditions per place. [2024-06-21 20:08:05,952 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 417 selfloop transitions, 106 changer transitions 0/530 dead transitions. [2024-06-21 20:08:05,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 530 transitions, 10028 flow [2024-06-21 20:08:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:08:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:08:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:08:05,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:08:05,954 INFO L175 Difference]: Start difference. First operand has 386 places, 512 transitions, 8938 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:08:05,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 530 transitions, 10028 flow [2024-06-21 20:08:12,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 530 transitions, 9816 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:08:12,601 INFO L231 Difference]: Finished difference. Result has 389 places, 512 transitions, 8943 flow [2024-06-21 20:08:12,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8726, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8943, PETRI_PLACES=389, PETRI_TRANSITIONS=512} [2024-06-21 20:08:12,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 20:08:12,602 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 512 transitions, 8943 flow [2024-06-21 20:08:12,602 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) [2024-06-21 20:08:12,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:12,602 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] [2024-06-21 20:08:12,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:08:12,603 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:12,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:12,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1621631482, now seen corresponding path program 6 times [2024-06-21 20:08:12,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:12,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695892278] [2024-06-21 20:08:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:12,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695892278] [2024-06-21 20:08:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695892278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:12,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:12,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986563621] [2024-06-21 20:08:12,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:12,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:12,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:12,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:12,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 512 transitions, 8943 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) [2024-06-21 20:08:12,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:12,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:12,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:15,317 INFO L124 PetriNetUnfolderBase]: 6572/11245 cut-off events. [2024-06-21 20:08:15,317 INFO L125 PetriNetUnfolderBase]: For 2025658/2025658 co-relation queries the response was YES. [2024-06-21 20:08:15,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94150 conditions, 11245 events. 6572/11245 cut-off events. For 2025658/2025658 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 88073 event pairs, 2452 based on Foata normal form. 2/11225 useless extension candidates. Maximal degree in co-relation 93970. Up to 10069 conditions per place. [2024-06-21 20:08:15,483 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 416 selfloop transitions, 113 changer transitions 1/537 dead transitions. [2024-06-21 20:08:15,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 537 transitions, 10339 flow [2024-06-21 20:08:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:08:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:08:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:08:15,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:08:15,484 INFO L175 Difference]: Start difference. First operand has 389 places, 512 transitions, 8943 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:08:15,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 537 transitions, 10339 flow [2024-06-21 20:08:22,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 537 transitions, 10112 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:08:22,564 INFO L231 Difference]: Finished difference. Result has 392 places, 513 transitions, 8984 flow [2024-06-21 20:08:22,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8984, PETRI_PLACES=392, PETRI_TRANSITIONS=513} [2024-06-21 20:08:22,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-21 20:08:22,565 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 513 transitions, 8984 flow [2024-06-21 20:08:22,565 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) [2024-06-21 20:08:22,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:22,566 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] [2024-06-21 20:08:22,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:08:22,566 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:22,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1569462032, now seen corresponding path program 1 times [2024-06-21 20:08:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022269577] [2024-06-21 20:08:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:22,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:22,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:22,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022269577] [2024-06-21 20:08:22,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022269577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:22,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:22,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:22,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580317473] [2024-06-21 20:08:22,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:22,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:22,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:22,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:22,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:22,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 513 transitions, 8984 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) [2024-06-21 20:08:22,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:22,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:22,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:25,399 INFO L124 PetriNetUnfolderBase]: 6608/11332 cut-off events. [2024-06-21 20:08:25,399 INFO L125 PetriNetUnfolderBase]: For 2107753/2107753 co-relation queries the response was YES. [2024-06-21 20:08:25,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94980 conditions, 11332 events. 6608/11332 cut-off events. For 2107753/2107753 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89064 event pairs, 2484 based on Foata normal form. 10/11332 useless extension candidates. Maximal degree in co-relation 94798. Up to 10227 conditions per place. [2024-06-21 20:08:25,574 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 111 changer transitions 0/540 dead transitions. [2024-06-21 20:08:25,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 540 transitions, 10158 flow [2024-06-21 20:08:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:08:25,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:08:25,575 INFO L175 Difference]: Start difference. First operand has 392 places, 513 transitions, 8984 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:08:25,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 540 transitions, 10158 flow [2024-06-21 20:08:34,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 540 transitions, 9936 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:08:34,017 INFO L231 Difference]: Finished difference. Result has 396 places, 515 transitions, 9030 flow [2024-06-21 20:08:34,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8762, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9030, PETRI_PLACES=396, PETRI_TRANSITIONS=515} [2024-06-21 20:08:34,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 20:08:34,017 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 515 transitions, 9030 flow [2024-06-21 20:08:34,017 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) [2024-06-21 20:08:34,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:34,018 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] [2024-06-21 20:08:34,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:08:34,018 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:34,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash -78291717, now seen corresponding path program 1 times [2024-06-21 20:08:34,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:34,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428245641] [2024-06-21 20:08:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:34,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:34,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428245641] [2024-06-21 20:08:34,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428245641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:34,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:34,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224291641] [2024-06-21 20:08:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:34,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:34,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:34,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 515 transitions, 9030 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:34,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:34,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:34,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:36,768 INFO L124 PetriNetUnfolderBase]: 6653/11425 cut-off events. [2024-06-21 20:08:36,768 INFO L125 PetriNetUnfolderBase]: For 2126009/2126012 co-relation queries the response was YES. [2024-06-21 20:08:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96457 conditions, 11425 events. 6653/11425 cut-off events. For 2126009/2126012 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89986 event pairs, 2558 based on Foata normal form. 3/11419 useless extension candidates. Maximal degree in co-relation 96274. Up to 9952 conditions per place. [2024-06-21 20:08:36,935 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 299 selfloop transitions, 247 changer transitions 0/553 dead transitions. [2024-06-21 20:08:36,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 553 transitions, 11156 flow [2024-06-21 20:08:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:08:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:08:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:08:36,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:08:36,936 INFO L175 Difference]: Start difference. First operand has 396 places, 515 transitions, 9030 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:08:36,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 553 transitions, 11156 flow [2024-06-21 20:08:44,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 553 transitions, 10914 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:44,829 INFO L231 Difference]: Finished difference. Result has 397 places, 533 transitions, 9632 flow [2024-06-21 20:08:44,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8788, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9632, PETRI_PLACES=397, PETRI_TRANSITIONS=533} [2024-06-21 20:08:44,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-21 20:08:44,830 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 533 transitions, 9632 flow [2024-06-21 20:08:44,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:44,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:44,830 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] [2024-06-21 20:08:44,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:08:44,830 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:44,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash -839622825, now seen corresponding path program 2 times [2024-06-21 20:08:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:44,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879428056] [2024-06-21 20:08:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:44,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:44,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879428056] [2024-06-21 20:08:44,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879428056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:44,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:44,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:44,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674855711] [2024-06-21 20:08:44,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:44,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:44,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:44,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:44,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 533 transitions, 9632 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:44,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:44,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:44,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:47,636 INFO L124 PetriNetUnfolderBase]: 6650/11418 cut-off events. [2024-06-21 20:08:47,636 INFO L125 PetriNetUnfolderBase]: For 2159895/2159906 co-relation queries the response was YES. [2024-06-21 20:08:47,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96973 conditions, 11418 events. 6650/11418 cut-off events. For 2159895/2159906 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89870 event pairs, 2544 based on Foata normal form. 11/11421 useless extension candidates. Maximal degree in co-relation 96789. Up to 9949 conditions per place. [2024-06-21 20:08:47,793 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 295 selfloop transitions, 253 changer transitions 0/555 dead transitions. [2024-06-21 20:08:47,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 555 transitions, 11214 flow [2024-06-21 20:08:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:08:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:08:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:08:47,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:08:47,794 INFO L175 Difference]: Start difference. First operand has 397 places, 533 transitions, 9632 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:08:47,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 555 transitions, 11214 flow [2024-06-21 20:08:55,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 555 transitions, 10885 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:08:55,222 INFO L231 Difference]: Finished difference. Result has 401 places, 533 transitions, 9815 flow [2024-06-21 20:08:55,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9303, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9815, PETRI_PLACES=401, PETRI_TRANSITIONS=533} [2024-06-21 20:08:55,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-21 20:08:55,223 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 533 transitions, 9815 flow [2024-06-21 20:08:55,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:55,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:55,223 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] [2024-06-21 20:08:55,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:08:55,224 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:55,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash -835898175, now seen corresponding path program 3 times [2024-06-21 20:08:55,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:55,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611212447] [2024-06-21 20:08:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:55,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:55,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611212447] [2024-06-21 20:08:55,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611212447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:55,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:55,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:55,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075091333] [2024-06-21 20:08:55,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:55,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:55,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:55,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:55,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:55,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 533 transitions, 9815 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:55,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:55,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:55,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:58,043 INFO L124 PetriNetUnfolderBase]: 6655/11394 cut-off events. [2024-06-21 20:08:58,043 INFO L125 PetriNetUnfolderBase]: For 2201276/2201276 co-relation queries the response was YES. [2024-06-21 20:08:58,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97496 conditions, 11394 events. 6655/11394 cut-off events. For 2201276/2201276 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89468 event pairs, 2517 based on Foata normal form. 1/11385 useless extension candidates. Maximal degree in co-relation 97311. Up to 9955 conditions per place. [2024-06-21 20:08:58,213 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 285 selfloop transitions, 270 changer transitions 0/562 dead transitions. [2024-06-21 20:08:58,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 562 transitions, 11473 flow [2024-06-21 20:08:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:08:58,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:08:58,214 INFO L175 Difference]: Start difference. First operand has 401 places, 533 transitions, 9815 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:08:58,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 562 transitions, 11473 flow [2024-06-21 20:09:06,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 562 transitions, 10518 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 20:09:06,775 INFO L231 Difference]: Finished difference. Result has 402 places, 536 transitions, 9454 flow [2024-06-21 20:09:06,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8872, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9454, PETRI_PLACES=402, PETRI_TRANSITIONS=536} [2024-06-21 20:09:06,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-21 20:09:06,776 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 536 transitions, 9454 flow [2024-06-21 20:09:06,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:06,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:06,776 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] [2024-06-21 20:09:06,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:09:06,777 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:06,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash 932845203, now seen corresponding path program 4 times [2024-06-21 20:09:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:06,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805200049] [2024-06-21 20:09:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:06,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805200049] [2024-06-21 20:09:06,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805200049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:06,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:06,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:09:06,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409355224] [2024-06-21 20:09:06,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:06,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:09:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:09:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:09:06,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:06,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 536 transitions, 9454 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:06,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:06,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:06,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:09,416 INFO L124 PetriNetUnfolderBase]: 6660/11431 cut-off events. [2024-06-21 20:09:09,417 INFO L125 PetriNetUnfolderBase]: For 2235781/2235784 co-relation queries the response was YES. [2024-06-21 20:09:09,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97718 conditions, 11431 events. 6660/11431 cut-off events. For 2235781/2235784 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 90010 event pairs, 2544 based on Foata normal form. 3/11425 useless extension candidates. Maximal degree in co-relation 97534. Up to 9961 conditions per place. [2024-06-21 20:09:09,580 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 313 selfloop transitions, 236 changer transitions 0/556 dead transitions. [2024-06-21 20:09:09,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 556 transitions, 11314 flow [2024-06-21 20:09:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:09:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:09:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:09:09,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:09:09,582 INFO L175 Difference]: Start difference. First operand has 402 places, 536 transitions, 9454 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:09:09,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 556 transitions, 11314 flow [2024-06-21 20:09:18,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 556 transitions, 10927 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:09:18,905 INFO L231 Difference]: Finished difference. Result has 404 places, 539 transitions, 9607 flow [2024-06-21 20:09:18,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9070, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9607, PETRI_PLACES=404, PETRI_TRANSITIONS=539} [2024-06-21 20:09:18,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-21 20:09:18,906 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 539 transitions, 9607 flow [2024-06-21 20:09:18,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:18,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:18,906 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] [2024-06-21 20:09:18,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:09:18,907 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:18,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -835903755, now seen corresponding path program 5 times [2024-06-21 20:09:18,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:18,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15833314] [2024-06-21 20:09:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:18,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15833314] [2024-06-21 20:09:18,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15833314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:18,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:18,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:18,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760321422] [2024-06-21 20:09:18,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:18,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:18,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:19,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:19,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 539 transitions, 9607 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:19,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:19,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:19,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:21,769 INFO L124 PetriNetUnfolderBase]: 6665/11417 cut-off events. [2024-06-21 20:09:21,769 INFO L125 PetriNetUnfolderBase]: For 2275953/2275953 co-relation queries the response was YES. [2024-06-21 20:09:21,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98088 conditions, 11417 events. 6665/11417 cut-off events. For 2275953/2275953 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89714 event pairs, 2519 based on Foata normal form. 1/11408 useless extension candidates. Maximal degree in co-relation 97902. Up to 9967 conditions per place. [2024-06-21 20:09:21,922 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 285 selfloop transitions, 276 changer transitions 0/568 dead transitions. [2024-06-21 20:09:21,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 568 transitions, 11286 flow [2024-06-21 20:09:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:09:21,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:09:21,923 INFO L175 Difference]: Start difference. First operand has 404 places, 539 transitions, 9607 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:09:21,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 568 transitions, 11286 flow [2024-06-21 20:09:31,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 568 transitions, 10595 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:31,672 INFO L231 Difference]: Finished difference. Result has 406 places, 542 transitions, 9523 flow [2024-06-21 20:09:31,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8922, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9523, PETRI_PLACES=406, PETRI_TRANSITIONS=542} [2024-06-21 20:09:31,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 365 predicate places. [2024-06-21 20:09:31,672 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 542 transitions, 9523 flow [2024-06-21 20:09:31,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:31,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:31,673 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] [2024-06-21 20:09:31,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:09:31,673 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:31,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:31,673 INFO L85 PathProgramCache]: Analyzing trace with hash 932834043, now seen corresponding path program 6 times [2024-06-21 20:09:31,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:31,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400614185] [2024-06-21 20:09:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:31,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400614185] [2024-06-21 20:09:31,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400614185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:09:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38864656] [2024-06-21 20:09:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:09:31,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:09:31,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:09:31,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:31,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 542 transitions, 9523 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:31,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:31,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:31,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:34,663 INFO L124 PetriNetUnfolderBase]: 6662/11444 cut-off events. [2024-06-21 20:09:34,664 INFO L125 PetriNetUnfolderBase]: For 2307510/2307513 co-relation queries the response was YES. [2024-06-21 20:09:34,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98156 conditions, 11444 events. 6662/11444 cut-off events. For 2307510/2307513 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 90158 event pairs, 2548 based on Foata normal form. 3/11438 useless extension candidates. Maximal degree in co-relation 97971. Up to 9964 conditions per place. [2024-06-21 20:09:34,823 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 314 selfloop transitions, 237 changer transitions 0/558 dead transitions. [2024-06-21 20:09:34,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 558 transitions, 11111 flow [2024-06-21 20:09:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:09:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:09:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:09:34,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:09:34,824 INFO L175 Difference]: Start difference. First operand has 406 places, 542 transitions, 9523 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:09:34,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 558 transitions, 11111 flow [2024-06-21 20:09:44,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 558 transitions, 10535 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:44,702 INFO L231 Difference]: Finished difference. Result has 407 places, 542 transitions, 9427 flow [2024-06-21 20:09:44,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9427, PETRI_PLACES=407, PETRI_TRANSITIONS=542} [2024-06-21 20:09:44,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 20:09:44,703 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 542 transitions, 9427 flow [2024-06-21 20:09:44,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:44,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:44,703 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] [2024-06-21 20:09:44,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:09:44,704 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:44,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 444588014, now seen corresponding path program 1 times [2024-06-21 20:09:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:44,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444689088] [2024-06-21 20:09:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:44,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444689088] [2024-06-21 20:09:44,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444689088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:44,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:44,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:44,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496830234] [2024-06-21 20:09:44,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:44,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:44,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:44,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:44,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 542 transitions, 9427 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) [2024-06-21 20:09:44,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:44,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:44,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:47,549 INFO L124 PetriNetUnfolderBase]: 6698/11461 cut-off events. [2024-06-21 20:09:47,549 INFO L125 PetriNetUnfolderBase]: For 2404501/2404501 co-relation queries the response was YES. [2024-06-21 20:09:47,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98725 conditions, 11461 events. 6698/11461 cut-off events. For 2404501/2404501 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 89913 event pairs, 2518 based on Foata normal form. 10/11461 useless extension candidates. Maximal degree in co-relation 98539. Up to 9982 conditions per place. [2024-06-21 20:09:47,707 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 300 selfloop transitions, 264 changer transitions 0/571 dead transitions. [2024-06-21 20:09:47,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 571 transitions, 11134 flow [2024-06-21 20:09:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:09:47,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:09:47,709 INFO L175 Difference]: Start difference. First operand has 407 places, 542 transitions, 9427 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:09:47,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 571 transitions, 11134 flow [2024-06-21 20:09:59,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 571 transitions, 10647 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:59,310 INFO L231 Difference]: Finished difference. Result has 409 places, 544 transitions, 9525 flow [2024-06-21 20:09:59,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8940, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9525, PETRI_PLACES=409, PETRI_TRANSITIONS=544} [2024-06-21 20:09:59,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-21 20:09:59,311 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 544 transitions, 9525 flow [2024-06-21 20:09:59,311 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) [2024-06-21 20:09:59,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:59,311 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] [2024-06-21 20:09:59,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:09:59,311 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:59,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1573902875, now seen corresponding path program 7 times [2024-06-21 20:09:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:59,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848907312] [2024-06-21 20:09:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:59,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:59,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848907312] [2024-06-21 20:09:59,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848907312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:59,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:59,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428822516] [2024-06-21 20:09:59,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:59,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:59,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 544 transitions, 9525 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:59,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:59,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:59,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:02,258 INFO L124 PetriNetUnfolderBase]: 6703/11476 cut-off events. [2024-06-21 20:10:02,259 INFO L125 PetriNetUnfolderBase]: For 2384990/2384990 co-relation queries the response was YES. [2024-06-21 20:10:02,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99307 conditions, 11476 events. 6703/11476 cut-off events. For 2384990/2384990 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 90221 event pairs, 2532 based on Foata normal form. 1/11467 useless extension candidates. Maximal degree in co-relation 99120. Up to 10026 conditions per place. [2024-06-21 20:10:02,414 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 306 selfloop transitions, 254 changer transitions 0/567 dead transitions. [2024-06-21 20:10:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 567 transitions, 11194 flow [2024-06-21 20:10:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:10:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:10:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:10:02,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 20:10:02,415 INFO L175 Difference]: Start difference. First operand has 409 places, 544 transitions, 9525 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:10:02,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 567 transitions, 11194 flow [2024-06-21 20:10:13,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 567 transitions, 10638 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:10:13,671 INFO L231 Difference]: Finished difference. Result has 411 places, 547 transitions, 9528 flow [2024-06-21 20:10:13,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9528, PETRI_PLACES=411, PETRI_TRANSITIONS=547} [2024-06-21 20:10:13,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 20:10:13,672 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 547 transitions, 9528 flow [2024-06-21 20:10:13,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:13,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:13,673 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] [2024-06-21 20:10:13,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:10:13,673 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:13,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1563178115, now seen corresponding path program 8 times [2024-06-21 20:10:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473014850] [2024-06-21 20:10:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:13,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:13,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473014850] [2024-06-21 20:10:13,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473014850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:13,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:13,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:13,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856795509] [2024-06-21 20:10:13,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:13,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:13,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 547 transitions, 9528 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:13,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:13,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:13,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:16,512 INFO L124 PetriNetUnfolderBase]: 6700/11481 cut-off events. [2024-06-21 20:10:16,513 INFO L125 PetriNetUnfolderBase]: For 2421989/2421989 co-relation queries the response was YES. [2024-06-21 20:10:16,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99364 conditions, 11481 events. 6700/11481 cut-off events. For 2421989/2421989 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 90257 event pairs, 2512 based on Foata normal form. 1/11472 useless extension candidates. Maximal degree in co-relation 99176. Up to 10023 conditions per place. [2024-06-21 20:10:16,685 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 306 selfloop transitions, 257 changer transitions 0/570 dead transitions. [2024-06-21 20:10:16,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 570 transitions, 11398 flow [2024-06-21 20:10:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:10:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:10:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 20:10:16,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-21 20:10:16,687 INFO L175 Difference]: Start difference. First operand has 411 places, 547 transitions, 9528 flow. Second operand 10 states and 229 transitions. [2024-06-21 20:10:16,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 570 transitions, 11398 flow [2024-06-21 20:10:26,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 570 transitions, 11055 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:10:26,876 INFO L231 Difference]: Finished difference. Result has 416 places, 547 transitions, 9705 flow [2024-06-21 20:10:26,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9185, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9705, PETRI_PLACES=416, PETRI_TRANSITIONS=547} [2024-06-21 20:10:26,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-21 20:10:26,877 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 547 transitions, 9705 flow [2024-06-21 20:10:26,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:26,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:26,877 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] [2024-06-21 20:10:26,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:10:26,878 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:26,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1569468635, now seen corresponding path program 9 times [2024-06-21 20:10:26,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:26,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665337414] [2024-06-21 20:10:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:26,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:26,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665337414] [2024-06-21 20:10:26,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665337414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:26,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:26,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:26,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874485591] [2024-06-21 20:10:26,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:26,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:26,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 547 transitions, 9705 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:26,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:26,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:26,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:29,758 INFO L124 PetriNetUnfolderBase]: 6705/11497 cut-off events. [2024-06-21 20:10:29,759 INFO L125 PetriNetUnfolderBase]: For 2464957/2464957 co-relation queries the response was YES. [2024-06-21 20:10:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99892 conditions, 11497 events. 6705/11497 cut-off events. For 2464957/2464957 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 90538 event pairs, 2498 based on Foata normal form. 1/11488 useless extension candidates. Maximal degree in co-relation 99702. Up to 10029 conditions per place. [2024-06-21 20:10:29,921 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 310 selfloop transitions, 255 changer transitions 0/572 dead transitions. [2024-06-21 20:10:29,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 572 transitions, 11867 flow [2024-06-21 20:10:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:10:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:10:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:10:29,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 20:10:29,923 INFO L175 Difference]: Start difference. First operand has 416 places, 547 transitions, 9705 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:10:29,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 572 transitions, 11867 flow [2024-06-21 20:10:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 572 transitions, 11155 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 20:10:41,896 INFO L231 Difference]: Finished difference. Result has 415 places, 550 transitions, 9561 flow [2024-06-21 20:10:41,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9002, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9561, PETRI_PLACES=415, PETRI_TRANSITIONS=550} [2024-06-21 20:10:41,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-21 20:10:41,897 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 550 transitions, 9561 flow [2024-06-21 20:10:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:41,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:41,897 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] [2024-06-21 20:10:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:10:41,897 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:41,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -159064263, now seen corresponding path program 10 times [2024-06-21 20:10:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:41,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661650331] [2024-06-21 20:10:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:41,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:41,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661650331] [2024-06-21 20:10:41,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661650331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:41,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38503364] [2024-06-21 20:10:41,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:41,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:42,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:42,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 550 transitions, 9561 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:42,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:42,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:45,064 INFO L124 PetriNetUnfolderBase]: 6702/11489 cut-off events. [2024-06-21 20:10:45,064 INFO L125 PetriNetUnfolderBase]: For 2496400/2496400 co-relation queries the response was YES. [2024-06-21 20:10:45,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99971 conditions, 11489 events. 6702/11489 cut-off events. For 2496400/2496400 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 90475 event pairs, 2496 based on Foata normal form. 1/11480 useless extension candidates. Maximal degree in co-relation 99781. Up to 10026 conditions per place. [2024-06-21 20:10:45,229 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 267 changer transitions 0/573 dead transitions. [2024-06-21 20:10:45,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 573 transitions, 11449 flow [2024-06-21 20:10:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:10:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:10:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 20:10:45,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-21 20:10:45,230 INFO L175 Difference]: Start difference. First operand has 415 places, 550 transitions, 9561 flow. Second operand 10 states and 231 transitions. [2024-06-21 20:10:45,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 573 transitions, 11449 flow [2024-06-21 20:10:55,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 573 transitions, 11011 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:10:55,472 INFO L231 Difference]: Finished difference. Result has 421 places, 550 transitions, 9663 flow [2024-06-21 20:10:55,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9123, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9663, PETRI_PLACES=421, PETRI_TRANSITIONS=550} [2024-06-21 20:10:55,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-21 20:10:55,473 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 550 transitions, 9663 flow [2024-06-21 20:10:55,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:55,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:55,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:55,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:10:55,473 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:55,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -158880123, now seen corresponding path program 11 times [2024-06-21 20:10:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:55,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339920066] [2024-06-21 20:10:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:55,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:55,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339920066] [2024-06-21 20:10:55,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339920066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:55,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:55,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:55,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210748595] [2024-06-21 20:10:55,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:55,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:55,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:55,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:55,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 550 transitions, 9663 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:55,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:55,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:58,311 INFO L124 PetriNetUnfolderBase]: 6699/11489 cut-off events. [2024-06-21 20:10:58,312 INFO L125 PetriNetUnfolderBase]: For 2531598/2531598 co-relation queries the response was YES. [2024-06-21 20:10:58,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100253 conditions, 11489 events. 6699/11489 cut-off events. For 2531598/2531598 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 90460 event pairs, 2496 based on Foata normal form. 1/11480 useless extension candidates. Maximal degree in co-relation 100062. Up to 10023 conditions per place. [2024-06-21 20:10:58,492 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 311 selfloop transitions, 253 changer transitions 0/571 dead transitions. [2024-06-21 20:10:58,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 571 transitions, 11549 flow [2024-06-21 20:10:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:10:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:10:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:10:58,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:10:58,494 INFO L175 Difference]: Start difference. First operand has 421 places, 550 transitions, 9663 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:10:58,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 571 transitions, 11549 flow [2024-06-21 20:11:08,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 571 transitions, 10730 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 20:11:08,758 INFO L231 Difference]: Finished difference. Result has 418 places, 550 transitions, 9358 flow [2024-06-21 20:11:08,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8844, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9358, PETRI_PLACES=418, PETRI_TRANSITIONS=550} [2024-06-21 20:11:08,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-21 20:11:08,758 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 550 transitions, 9358 flow [2024-06-21 20:11:08,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:08,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:08,759 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] [2024-06-21 20:11:08,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:11:08,759 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:08,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash 677570839, now seen corresponding path program 12 times [2024-06-21 20:11:08,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:08,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001735529] [2024-06-21 20:11:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:08,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:08,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001735529] [2024-06-21 20:11:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001735529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:08,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:08,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:08,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877530834] [2024-06-21 20:11:08,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:08,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:08,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:08,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:08,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 550 transitions, 9358 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:08,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:08,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:08,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:11,623 INFO L124 PetriNetUnfolderBase]: 6696/11478 cut-off events. [2024-06-21 20:11:11,623 INFO L125 PetriNetUnfolderBase]: For 2562255/2562255 co-relation queries the response was YES. [2024-06-21 20:11:11,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100275 conditions, 11478 events. 6696/11478 cut-off events. For 2562255/2562255 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 90374 event pairs, 2515 based on Foata normal form. 1/11469 useless extension candidates. Maximal degree in co-relation 100084. Up to 10020 conditions per place. [2024-06-21 20:11:11,791 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 309 selfloop transitions, 254 changer transitions 0/570 dead transitions. [2024-06-21 20:11:11,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 570 transitions, 11008 flow [2024-06-21 20:11:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:11:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:11:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:11:11,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 20:11:11,792 INFO L175 Difference]: Start difference. First operand has 418 places, 550 transitions, 9358 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:11:11,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 570 transitions, 11008 flow [2024-06-21 20:11:24,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 570 transitions, 10249 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 20:11:24,322 INFO L231 Difference]: Finished difference. Result has 417 places, 550 transitions, 9116 flow [2024-06-21 20:11:24,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8599, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9116, PETRI_PLACES=417, PETRI_TRANSITIONS=550} [2024-06-21 20:11:24,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 20:11:24,323 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 550 transitions, 9116 flow [2024-06-21 20:11:24,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:24,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:24,323 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] [2024-06-21 20:11:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:11:24,323 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:24,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:24,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1136733360, now seen corresponding path program 2 times [2024-06-21 20:11:24,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:24,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020187714] [2024-06-21 20:11:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:24,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:24,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:24,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020187714] [2024-06-21 20:11:24,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020187714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:24,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:24,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:24,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794908964] [2024-06-21 20:11:24,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:24,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:24,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:24,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:24,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:24,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 550 transitions, 9116 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) [2024-06-21 20:11:24,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:24,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:24,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:27,251 INFO L124 PetriNetUnfolderBase]: 6686/11471 cut-off events. [2024-06-21 20:11:27,251 INFO L125 PetriNetUnfolderBase]: For 2608615/2608615 co-relation queries the response was YES. [2024-06-21 20:11:27,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99494 conditions, 11471 events. 6686/11471 cut-off events. For 2608615/2608615 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 90437 event pairs, 2458 based on Foata normal form. 10/11471 useless extension candidates. Maximal degree in co-relation 99303. Up to 10342 conditions per place. [2024-06-21 20:11:27,430 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 107 changer transitions 0/575 dead transitions. [2024-06-21 20:11:27,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 575 transitions, 10358 flow [2024-06-21 20:11:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:11:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:11:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 20:11:27,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:11:27,431 INFO L175 Difference]: Start difference. First operand has 417 places, 550 transitions, 9116 flow. Second operand 9 states and 207 transitions. [2024-06-21 20:11:27,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 575 transitions, 10358 flow [2024-06-21 20:11:38,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 9846 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:11:38,773 INFO L231 Difference]: Finished difference. Result has 418 places, 552 transitions, 8868 flow [2024-06-21 20:11:38,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8604, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8868, PETRI_PLACES=418, PETRI_TRANSITIONS=552} [2024-06-21 20:11:38,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-21 20:11:38,774 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 552 transitions, 8868 flow [2024-06-21 20:11:38,774 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) [2024-06-21 20:11:38,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:38,774 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] [2024-06-21 20:11:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:11:38,775 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:38,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1734001102, now seen corresponding path program 2 times [2024-06-21 20:11:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:38,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210690006] [2024-06-21 20:11:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:38,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:38,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210690006] [2024-06-21 20:11:38,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210690006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:38,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:38,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870557805] [2024-06-21 20:11:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:38,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:38,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:38,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 552 transitions, 8868 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) [2024-06-21 20:11:38,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:38,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:38,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:41,706 INFO L124 PetriNetUnfolderBase]: 6722/11510 cut-off events. [2024-06-21 20:11:41,707 INFO L125 PetriNetUnfolderBase]: For 2647387/2647387 co-relation queries the response was YES. [2024-06-21 20:11:41,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99860 conditions, 11510 events. 6722/11510 cut-off events. For 2647387/2647387 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 90479 event pairs, 2532 based on Foata normal form. 10/11510 useless extension candidates. Maximal degree in co-relation 99668. Up to 10024 conditions per place. [2024-06-21 20:11:41,866 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 314 selfloop transitions, 257 changer transitions 0/578 dead transitions. [2024-06-21 20:11:41,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 578 transitions, 10617 flow [2024-06-21 20:11:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:11:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:11:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:11:41,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:11:41,867 INFO L175 Difference]: Start difference. First operand has 418 places, 552 transitions, 8868 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:11:41,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 578 transitions, 10617 flow [2024-06-21 20:11:54,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 578 transitions, 10379 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:11:54,439 INFO L231 Difference]: Finished difference. Result has 419 places, 554 transitions, 9205 flow [2024-06-21 20:11:54,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8630, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9205, PETRI_PLACES=419, PETRI_TRANSITIONS=554} [2024-06-21 20:11:54,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-21 20:11:54,440 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 554 transitions, 9205 flow [2024-06-21 20:11:54,440 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) [2024-06-21 20:11:54,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:54,440 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] [2024-06-21 20:11:54,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:11:54,441 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:54,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1104672906, now seen corresponding path program 3 times [2024-06-21 20:11:54,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:54,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351760250] [2024-06-21 20:11:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:54,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:54,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:54,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351760250] [2024-06-21 20:11:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351760250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:54,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:54,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:54,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091290054] [2024-06-21 20:11:54,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:54,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:54,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:54,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:54,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 554 transitions, 9205 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) [2024-06-21 20:11:54,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:54,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:54,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:57,472 INFO L124 PetriNetUnfolderBase]: 6758/11566 cut-off events. [2024-06-21 20:11:57,473 INFO L125 PetriNetUnfolderBase]: For 2693627/2693627 co-relation queries the response was YES. [2024-06-21 20:11:57,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101053 conditions, 11566 events. 6758/11566 cut-off events. For 2693627/2693627 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 90979 event pairs, 2538 based on Foata normal form. 10/11566 useless extension candidates. Maximal degree in co-relation 100860. Up to 10080 conditions per place. [2024-06-21 20:11:57,636 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 257 changer transitions 0/580 dead transitions. [2024-06-21 20:11:57,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 580 transitions, 10966 flow [2024-06-21 20:11:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:11:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:11:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:11:57,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:11:57,637 INFO L175 Difference]: Start difference. First operand has 419 places, 554 transitions, 9205 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:11:57,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 580 transitions, 10966 flow [2024-06-21 20:12:09,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 580 transitions, 10426 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:12:09,180 INFO L231 Difference]: Finished difference. Result has 421 places, 556 transitions, 9244 flow [2024-06-21 20:12:09,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8665, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9244, PETRI_PLACES=421, PETRI_TRANSITIONS=556} [2024-06-21 20:12:09,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-21 20:12:09,181 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 556 transitions, 9244 flow [2024-06-21 20:12:09,181 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) [2024-06-21 20:12:09,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:09,182 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] [2024-06-21 20:12:09,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:12:09,182 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:09,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1113243786, now seen corresponding path program 4 times [2024-06-21 20:12:09,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:09,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300636689] [2024-06-21 20:12:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:09,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300636689] [2024-06-21 20:12:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300636689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:09,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:09,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:12:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011877520] [2024-06-21 20:12:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:09,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:12:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:12:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:12:09,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:09,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 556 transitions, 9244 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) [2024-06-21 20:12:09,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:09,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:09,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:12,160 INFO L124 PetriNetUnfolderBase]: 6748/11539 cut-off events. [2024-06-21 20:12:12,161 INFO L125 PetriNetUnfolderBase]: For 2676171/2676171 co-relation queries the response was YES. [2024-06-21 20:12:12,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100309 conditions, 11539 events. 6748/11539 cut-off events. For 2676171/2676171 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 90443 event pairs, 2508 based on Foata normal form. 10/11539 useless extension candidates. Maximal degree in co-relation 100115. Up to 9018 conditions per place. [2024-06-21 20:12:12,330 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 317 selfloop transitions, 265 changer transitions 0/589 dead transitions. [2024-06-21 20:12:12,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 589 transitions, 11313 flow [2024-06-21 20:12:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:12:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:12:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:12:12,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:12:12,332 INFO L175 Difference]: Start difference. First operand has 421 places, 556 transitions, 9244 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:12:12,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 589 transitions, 11313 flow [2024-06-21 20:12:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 589 transitions, 10769 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:12:23,695 INFO L231 Difference]: Finished difference. Result has 423 places, 558 transitions, 9300 flow [2024-06-21 20:12:23,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8700, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9300, PETRI_PLACES=423, PETRI_TRANSITIONS=558} [2024-06-21 20:12:23,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-21 20:12:23,703 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 558 transitions, 9300 flow [2024-06-21 20:12:23,703 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) [2024-06-21 20:12:23,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:23,704 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] [2024-06-21 20:12:23,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:12:23,704 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:23,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -670473130, now seen corresponding path program 7 times [2024-06-21 20:12:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:23,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476906397] [2024-06-21 20:12:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:23,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476906397] [2024-06-21 20:12:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476906397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:23,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538476489] [2024-06-21 20:12:23,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:23,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:23,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 558 transitions, 9300 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) [2024-06-21 20:12:23,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:23,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:23,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:26,713 INFO L124 PetriNetUnfolderBase]: 6704/11470 cut-off events. [2024-06-21 20:12:26,714 INFO L125 PetriNetUnfolderBase]: For 2656138/2656141 co-relation queries the response was YES. [2024-06-21 20:12:26,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99173 conditions, 11470 events. 6704/11470 cut-off events. For 2656138/2656141 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 89999 event pairs, 2396 based on Foata normal form. 14/11473 useless extension candidates. Maximal degree in co-relation 98978. Up to 10356 conditions per place. [2024-06-21 20:12:26,883 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 477 selfloop transitions, 102 changer transitions 4/590 dead transitions. [2024-06-21 20:12:26,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 590 transitions, 10613 flow [2024-06-21 20:12:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:12:26,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:12:26,885 INFO L175 Difference]: Start difference. First operand has 423 places, 558 transitions, 9300 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:12:26,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 590 transitions, 10613 flow [2024-06-21 20:12:38,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 590 transitions, 10071 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:12:38,304 INFO L231 Difference]: Finished difference. Result has 425 places, 558 transitions, 8997 flow [2024-06-21 20:12:38,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8758, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8997, PETRI_PLACES=425, PETRI_TRANSITIONS=558} [2024-06-21 20:12:38,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-21 20:12:38,305 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 558 transitions, 8997 flow [2024-06-21 20:12:38,305 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) [2024-06-21 20:12:38,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:38,305 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] [2024-06-21 20:12:38,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:12:38,305 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:38,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash 349222010, now seen corresponding path program 8 times [2024-06-21 20:12:38,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:38,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746744987] [2024-06-21 20:12:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:38,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:38,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746744987] [2024-06-21 20:12:38,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746744987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:38,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:38,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229975873] [2024-06-21 20:12:38,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:38,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:38,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:38,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 558 transitions, 8997 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) [2024-06-21 20:12:38,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:38,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:41,329 INFO L124 PetriNetUnfolderBase]: 6488/11082 cut-off events. [2024-06-21 20:12:41,329 INFO L125 PetriNetUnfolderBase]: For 2603123/2603126 co-relation queries the response was YES. [2024-06-21 20:12:41,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95660 conditions, 11082 events. 6488/11082 cut-off events. For 2603123/2603126 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 85854 event pairs, 1999 based on Foata normal form. 14/11094 useless extension candidates. Maximal degree in co-relation 95464. Up to 9077 conditions per place. [2024-06-21 20:12:41,490 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 468 selfloop transitions, 114 changer transitions 6/595 dead transitions. [2024-06-21 20:12:41,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 595 transitions, 10549 flow [2024-06-21 20:12:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 20:12:41,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2024-06-21 20:12:41,491 INFO L175 Difference]: Start difference. First operand has 425 places, 558 transitions, 8997 flow. Second operand 7 states and 188 transitions. [2024-06-21 20:12:41,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 595 transitions, 10549 flow [2024-06-21 20:12:53,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 595 transitions, 10291 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:12:53,619 INFO L231 Difference]: Finished difference. Result has 426 places, 554 transitions, 8922 flow [2024-06-21 20:12:53,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8741, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8922, PETRI_PLACES=426, PETRI_TRANSITIONS=554} [2024-06-21 20:12:53,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 20:12:53,632 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 554 transitions, 8922 flow [2024-06-21 20:12:53,633 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) [2024-06-21 20:12:53,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:53,633 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] [2024-06-21 20:12:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:12:53,633 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:53,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash 48571828, now seen corresponding path program 3 times [2024-06-21 20:12:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:53,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163441778] [2024-06-21 20:12:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:53,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:53,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163441778] [2024-06-21 20:12:53,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163441778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:53,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:53,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:53,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684383894] [2024-06-21 20:12:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:53,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:53,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:53,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:53,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 554 transitions, 8922 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) [2024-06-21 20:12:53,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:53,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:53,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:56,363 INFO L124 PetriNetUnfolderBase]: 6378/10900 cut-off events. [2024-06-21 20:12:56,363 INFO L125 PetriNetUnfolderBase]: For 2511194/2511194 co-relation queries the response was YES. [2024-06-21 20:12:56,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94366 conditions, 10900 events. 6378/10900 cut-off events. For 2511194/2511194 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 84600 event pairs, 2288 based on Foata normal form. 2/10893 useless extension candidates. Maximal degree in co-relation 94170. Up to 9817 conditions per place. [2024-06-21 20:12:56,526 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 456 selfloop transitions, 120 changer transitions 0/583 dead transitions. [2024-06-21 20:12:56,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 583 transitions, 10549 flow [2024-06-21 20:12:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:12:56,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:12:56,527 INFO L175 Difference]: Start difference. First operand has 426 places, 554 transitions, 8922 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:12:56,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 583 transitions, 10549 flow [2024-06-21 20:13:07,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 583 transitions, 10315 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:13:07,590 INFO L231 Difference]: Finished difference. Result has 429 places, 560 transitions, 9126 flow [2024-06-21 20:13:07,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8690, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9126, PETRI_PLACES=429, PETRI_TRANSITIONS=560} [2024-06-21 20:13:07,591 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 20:13:07,591 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 560 transitions, 9126 flow [2024-06-21 20:13:07,591 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) [2024-06-21 20:13:07,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:07,591 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] [2024-06-21 20:13:07,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:13:07,592 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:07,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -145224750, now seen corresponding path program 4 times [2024-06-21 20:13:07,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:07,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347304570] [2024-06-21 20:13:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:07,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:07,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347304570] [2024-06-21 20:13:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347304570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:07,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:07,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:07,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753259353] [2024-06-21 20:13:07,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:07,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:07,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:07,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:07,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 560 transitions, 9126 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) [2024-06-21 20:13:07,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:07,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:07,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:10,433 INFO L124 PetriNetUnfolderBase]: 6373/10899 cut-off events. [2024-06-21 20:13:10,434 INFO L125 PetriNetUnfolderBase]: For 2497598/2497598 co-relation queries the response was YES. [2024-06-21 20:13:10,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94044 conditions, 10899 events. 6373/10899 cut-off events. For 2497598/2497598 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 84574 event pairs, 2311 based on Foata normal form. 2/10894 useless extension candidates. Maximal degree in co-relation 93847. Up to 9859 conditions per place. [2024-06-21 20:13:10,597 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 458 selfloop transitions, 114 changer transitions 0/579 dead transitions. [2024-06-21 20:13:10,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 579 transitions, 10359 flow [2024-06-21 20:13:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:13:10,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:13:10,598 INFO L175 Difference]: Start difference. First operand has 429 places, 560 transitions, 9126 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:13:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 579 transitions, 10359 flow [2024-06-21 20:13:22,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 579 transitions, 10102 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 20:13:22,799 INFO L231 Difference]: Finished difference. Result has 433 places, 561 transitions, 9149 flow [2024-06-21 20:13:22,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8885, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9149, PETRI_PLACES=433, PETRI_TRANSITIONS=561} [2024-06-21 20:13:22,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-21 20:13:22,800 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 561 transitions, 9149 flow [2024-06-21 20:13:22,800 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) [2024-06-21 20:13:22,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:22,800 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] [2024-06-21 20:13:22,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:13:22,800 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:22,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1598400500, now seen corresponding path program 5 times [2024-06-21 20:13:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:22,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165198098] [2024-06-21 20:13:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:22,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:22,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:22,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165198098] [2024-06-21 20:13:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165198098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:22,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:22,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:22,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750891098] [2024-06-21 20:13:22,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:22,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:22,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:22,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:22,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:22,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 561 transitions, 9149 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) [2024-06-21 20:13:22,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:22,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:22,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:25,522 INFO L124 PetriNetUnfolderBase]: 6414/10966 cut-off events. [2024-06-21 20:13:25,522 INFO L125 PetriNetUnfolderBase]: For 2578200/2578200 co-relation queries the response was YES. [2024-06-21 20:13:25,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95505 conditions, 10966 events. 6414/10966 cut-off events. For 2578200/2578200 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 85266 event pairs, 2036 based on Foata normal form. 2/10945 useless extension candidates. Maximal degree in co-relation 95306. Up to 9308 conditions per place. [2024-06-21 20:13:25,688 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 445 selfloop transitions, 143 changer transitions 0/595 dead transitions. [2024-06-21 20:13:25,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 595 transitions, 11066 flow [2024-06-21 20:13:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:13:25,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:13:25,689 INFO L175 Difference]: Start difference. First operand has 433 places, 561 transitions, 9149 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:13:25,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 595 transitions, 11066 flow [2024-06-21 20:13:35,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 595 transitions, 10805 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:13:35,815 INFO L231 Difference]: Finished difference. Result has 436 places, 567 transitions, 9355 flow [2024-06-21 20:13:35,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8888, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9355, PETRI_PLACES=436, PETRI_TRANSITIONS=567} [2024-06-21 20:13:35,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-21 20:13:35,816 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 567 transitions, 9355 flow [2024-06-21 20:13:35,816 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) [2024-06-21 20:13:35,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:35,816 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] [2024-06-21 20:13:35,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:13:35,816 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:35,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:35,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1147577854, now seen corresponding path program 6 times [2024-06-21 20:13:35,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:35,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145153970] [2024-06-21 20:13:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:35,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:35,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:35,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145153970] [2024-06-21 20:13:35,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145153970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:35,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:13:35,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848621904] [2024-06-21 20:13:35,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:35,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:13:35,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:13:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:13:35,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:35,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 567 transitions, 9355 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) [2024-06-21 20:13:35,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:35,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:35,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:38,753 INFO L124 PetriNetUnfolderBase]: 6409/10965 cut-off events. [2024-06-21 20:13:38,753 INFO L125 PetriNetUnfolderBase]: For 2605230/2605230 co-relation queries the response was YES. [2024-06-21 20:13:38,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95764 conditions, 10965 events. 6409/10965 cut-off events. For 2605230/2605230 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 85196 event pairs, 2348 based on Foata normal form. 2/10960 useless extension candidates. Maximal degree in co-relation 95563. Up to 9915 conditions per place. [2024-06-21 20:13:38,935 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 465 selfloop transitions, 114 changer transitions 0/586 dead transitions. [2024-06-21 20:13:38,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 586 transitions, 10559 flow [2024-06-21 20:13:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:13:38,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 20:13:38,937 INFO L175 Difference]: Start difference. First operand has 436 places, 567 transitions, 9355 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:13:38,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 586 transitions, 10559 flow [2024-06-21 20:13:50,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 586 transitions, 10233 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 20:13:50,304 INFO L231 Difference]: Finished difference. Result has 441 places, 567 transitions, 9262 flow [2024-06-21 20:13:50,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9029, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9262, PETRI_PLACES=441, PETRI_TRANSITIONS=567} [2024-06-21 20:13:50,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 20:13:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 567 transitions, 9262 flow [2024-06-21 20:13:50,305 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) [2024-06-21 20:13:50,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:50,305 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] [2024-06-21 20:13:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:13:50,305 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:50,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:50,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2057513154, now seen corresponding path program 7 times [2024-06-21 20:13:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:50,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522605383] [2024-06-21 20:13:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:50,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:50,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522605383] [2024-06-21 20:13:50,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522605383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:50,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:50,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:13:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795196080] [2024-06-21 20:13:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:50,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:13:50,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:13:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:13:50,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:50,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 567 transitions, 9262 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) [2024-06-21 20:13:50,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:50,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:50,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:53,543 INFO L124 PetriNetUnfolderBase]: 6417/10960 cut-off events. [2024-06-21 20:13:53,543 INFO L125 PetriNetUnfolderBase]: For 2643118/2643118 co-relation queries the response was YES. [2024-06-21 20:13:53,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95840 conditions, 10960 events. 6417/10960 cut-off events. For 2643118/2643118 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 85121 event pairs, 2074 based on Foata normal form. 2/10939 useless extension candidates. Maximal degree in co-relation 95638. Up to 9615 conditions per place. [2024-06-21 20:13:53,710 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 451 selfloop transitions, 138 changer transitions 2/598 dead transitions. [2024-06-21 20:13:53,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 598 transitions, 10566 flow [2024-06-21 20:13:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:13:53,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:13:53,712 INFO L175 Difference]: Start difference. First operand has 441 places, 567 transitions, 9262 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:13:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 598 transitions, 10566 flow [2024-06-21 20:14:05,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 598 transitions, 10323 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:14:05,694 INFO L231 Difference]: Finished difference. Result has 443 places, 569 transitions, 9340 flow [2024-06-21 20:14:05,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9019, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9340, PETRI_PLACES=443, PETRI_TRANSITIONS=569} [2024-06-21 20:14:05,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 20:14:05,709 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 569 transitions, 9340 flow [2024-06-21 20:14:05,709 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) [2024-06-21 20:14:05,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:05,709 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] [2024-06-21 20:14:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:14:05,709 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:05,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash 508084418, now seen corresponding path program 8 times [2024-06-21 20:14:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359954963] [2024-06-21 20:14:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:05,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:05,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359954963] [2024-06-21 20:14:05,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359954963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:05,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:05,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:05,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750284167] [2024-06-21 20:14:05,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:05,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:05,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:05,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:05,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:05,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:05,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 569 transitions, 9340 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) [2024-06-21 20:14:05,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:05,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:05,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:08,694 INFO L124 PetriNetUnfolderBase]: 6412/10943 cut-off events. [2024-06-21 20:14:08,694 INFO L125 PetriNetUnfolderBase]: For 2671390/2671390 co-relation queries the response was YES. [2024-06-21 20:14:08,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96033 conditions, 10943 events. 6412/10943 cut-off events. For 2671390/2671390 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 84879 event pairs, 2309 based on Foata normal form. 2/10932 useless extension candidates. Maximal degree in co-relation 95830. Up to 9875 conditions per place. [2024-06-21 20:14:08,862 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 123 changer transitions 2/593 dead transitions. [2024-06-21 20:14:08,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 593 transitions, 10832 flow [2024-06-21 20:14:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:14:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:14:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 20:14:08,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-21 20:14:08,863 INFO L175 Difference]: Start difference. First operand has 443 places, 569 transitions, 9340 flow. Second operand 9 states and 206 transitions. [2024-06-21 20:14:08,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 593 transitions, 10832 flow [2024-06-21 20:14:19,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 593 transitions, 10560 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:14:19,546 INFO L231 Difference]: Finished difference. Result has 447 places, 569 transitions, 9319 flow [2024-06-21 20:14:19,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9068, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9319, PETRI_PLACES=447, PETRI_TRANSITIONS=569} [2024-06-21 20:14:19,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 20:14:19,546 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 569 transitions, 9319 flow [2024-06-21 20:14:19,546 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) [2024-06-21 20:14:19,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:19,547 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] [2024-06-21 20:14:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:14:19,547 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:19,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:19,550 INFO L85 PathProgramCache]: Analyzing trace with hash 499513538, now seen corresponding path program 9 times [2024-06-21 20:14:19,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:19,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115533323] [2024-06-21 20:14:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:19,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:19,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:19,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115533323] [2024-06-21 20:14:19,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115533323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:19,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:19,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:19,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988851676] [2024-06-21 20:14:19,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:19,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:19,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:19,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:19,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 569 transitions, 9319 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) [2024-06-21 20:14:19,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:19,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:19,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:22,475 INFO L124 PetriNetUnfolderBase]: 6407/10949 cut-off events. [2024-06-21 20:14:22,475 INFO L125 PetriNetUnfolderBase]: For 2698747/2698747 co-relation queries the response was YES. [2024-06-21 20:14:22,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95892 conditions, 10949 events. 6407/10949 cut-off events. For 2698747/2698747 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 85016 event pairs, 2319 based on Foata normal form. 2/10944 useless extension candidates. Maximal degree in co-relation 95688. Up to 9913 conditions per place. [2024-06-21 20:14:22,646 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 463 selfloop transitions, 118 changer transitions 0/588 dead transitions. [2024-06-21 20:14:22,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 588 transitions, 10527 flow [2024-06-21 20:14:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 20:14:22,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:14:22,647 INFO L175 Difference]: Start difference. First operand has 447 places, 569 transitions, 9319 flow. Second operand 8 states and 184 transitions. [2024-06-21 20:14:22,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 588 transitions, 10527 flow [2024-06-21 20:14:34,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 588 transitions, 10231 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:14:34,191 INFO L231 Difference]: Finished difference. Result has 449 places, 569 transitions, 9264 flow [2024-06-21 20:14:34,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9023, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9264, PETRI_PLACES=449, PETRI_TRANSITIONS=569} [2024-06-21 20:14:34,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-21 20:14:34,192 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 569 transitions, 9264 flow [2024-06-21 20:14:34,192 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) [2024-06-21 20:14:34,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:34,192 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] [2024-06-21 20:14:34,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:14:34,192 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:34,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash 512405105, now seen corresponding path program 13 times [2024-06-21 20:14:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:34,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445105531] [2024-06-21 20:14:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:34,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:34,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445105531] [2024-06-21 20:14:34,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445105531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:34,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:34,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493799343] [2024-06-21 20:14:34,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:34,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:34,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:34,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:34,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 569 transitions, 9264 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:34,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:34,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:34,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:37,211 INFO L124 PetriNetUnfolderBase]: 6412/10986 cut-off events. [2024-06-21 20:14:37,212 INFO L125 PetriNetUnfolderBase]: For 2728860/2728863 co-relation queries the response was YES. [2024-06-21 20:14:37,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96153 conditions, 10986 events. 6412/10986 cut-off events. For 2728860/2728863 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 85472 event pairs, 2399 based on Foata normal form. 3/10980 useless extension candidates. Maximal degree in co-relation 95948. Up to 9560 conditions per place. [2024-06-21 20:14:37,390 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 335 selfloop transitions, 247 changer transitions 0/589 dead transitions. [2024-06-21 20:14:37,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 589 transitions, 11036 flow [2024-06-21 20:14:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 20:14:37,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:14:37,391 INFO L175 Difference]: Start difference. First operand has 449 places, 569 transitions, 9264 flow. Second operand 8 states and 184 transitions. [2024-06-21 20:14:37,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 589 transitions, 11036 flow [2024-06-21 20:14:48,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 589 transitions, 10830 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:14:48,051 INFO L231 Difference]: Finished difference. Result has 451 places, 572 transitions, 9602 flow [2024-06-21 20:14:48,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9058, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9602, PETRI_PLACES=451, PETRI_TRANSITIONS=572} [2024-06-21 20:14:48,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-21 20:14:48,051 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 572 transitions, 9602 flow [2024-06-21 20:14:48,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:48,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:48,052 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] [2024-06-21 20:14:48,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:14:48,052 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:48,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1143979491, now seen corresponding path program 14 times [2024-06-21 20:14:48,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:48,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308254696] [2024-06-21 20:14:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308254696] [2024-06-21 20:14:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308254696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:48,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:48,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12160635] [2024-06-21 20:14:48,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:48,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:48,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:48,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:48,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 572 transitions, 9602 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:48,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:48,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:48,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:51,009 INFO L124 PetriNetUnfolderBase]: 6417/10995 cut-off events. [2024-06-21 20:14:51,009 INFO L125 PetriNetUnfolderBase]: For 2772293/2772296 co-relation queries the response was YES. [2024-06-21 20:14:51,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96912 conditions, 10995 events. 6417/10995 cut-off events. For 2772293/2772296 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 85648 event pairs, 2395 based on Foata normal form. 3/10989 useless extension candidates. Maximal degree in co-relation 96706. Up to 9566 conditions per place. [2024-06-21 20:14:51,186 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 338 selfloop transitions, 248 changer transitions 0/593 dead transitions. [2024-06-21 20:14:51,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 593 transitions, 11658 flow [2024-06-21 20:14:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 20:14:51,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-21 20:14:51,188 INFO L175 Difference]: Start difference. First operand has 451 places, 572 transitions, 9602 flow. Second operand 8 states and 187 transitions. [2024-06-21 20:14:51,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 593 transitions, 11658 flow [2024-06-21 20:15:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 593 transitions, 11256 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:15:03,471 INFO L231 Difference]: Finished difference. Result has 454 places, 575 transitions, 9752 flow [2024-06-21 20:15:03,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9203, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9752, PETRI_PLACES=454, PETRI_TRANSITIONS=575} [2024-06-21 20:15:03,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-21 20:15:03,471 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 575 transitions, 9752 flow [2024-06-21 20:15:03,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:03,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:03,472 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] [2024-06-21 20:15:03,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:15:03,472 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1864684807, now seen corresponding path program 15 times [2024-06-21 20:15:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:03,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590652589] [2024-06-21 20:15:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:03,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:03,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590652589] [2024-06-21 20:15:03,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590652589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:03,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:03,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:03,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595232465] [2024-06-21 20:15:03,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:03,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:03,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:03,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:03,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:03,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 575 transitions, 9752 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:03,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:03,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:03,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:06,515 INFO L124 PetriNetUnfolderBase]: 6414/10991 cut-off events. [2024-06-21 20:15:06,515 INFO L125 PetriNetUnfolderBase]: For 2807495/2807498 co-relation queries the response was YES. [2024-06-21 20:15:06,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97055 conditions, 10991 events. 6414/10991 cut-off events. For 2807495/2807498 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 85534 event pairs, 2385 based on Foata normal form. 3/10985 useless extension candidates. Maximal degree in co-relation 96847. Up to 9563 conditions per place. [2024-06-21 20:15:06,684 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 336 selfloop transitions, 249 changer transitions 0/592 dead transitions. [2024-06-21 20:15:06,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 592 transitions, 11494 flow [2024-06-21 20:15:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:15:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:15:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:15:06,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:15:06,685 INFO L175 Difference]: Start difference. First operand has 454 places, 575 transitions, 9752 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:15:06,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 592 transitions, 11494 flow [2024-06-21 20:15:19,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 592 transitions, 10672 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 20:15:19,484 INFO L231 Difference]: Finished difference. Result has 454 places, 575 transitions, 9434 flow [2024-06-21 20:15:19,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8930, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9434, PETRI_PLACES=454, PETRI_TRANSITIONS=575} [2024-06-21 20:15:19,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-21 20:15:19,485 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 575 transitions, 9434 flow [2024-06-21 20:15:19,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:19,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:19,485 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] [2024-06-21 20:15:19,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:15:19,486 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:19,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:19,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1704206192, now seen corresponding path program 5 times [2024-06-21 20:15:19,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:19,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946509337] [2024-06-21 20:15:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:19,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:19,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946509337] [2024-06-21 20:15:19,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946509337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:19,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:19,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:19,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834054649] [2024-06-21 20:15:19,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:19,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:19,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:19,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:19,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 575 transitions, 9434 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) [2024-06-21 20:15:19,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:19,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:19,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:22,468 INFO L124 PetriNetUnfolderBase]: 6362/10840 cut-off events. [2024-06-21 20:15:22,468 INFO L125 PetriNetUnfolderBase]: For 2835414/2835414 co-relation queries the response was YES. [2024-06-21 20:15:22,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95045 conditions, 10840 events. 6362/10840 cut-off events. For 2835414/2835414 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 83755 event pairs, 2315 based on Foata normal form. 10/10843 useless extension candidates. Maximal degree in co-relation 94838. Up to 9433 conditions per place. [2024-06-21 20:15:22,840 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 297 selfloop transitions, 290 changer transitions 4/598 dead transitions. [2024-06-21 20:15:22,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 598 transitions, 10954 flow [2024-06-21 20:15:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:15:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:15:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:15:22,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 20:15:22,841 INFO L175 Difference]: Start difference. First operand has 454 places, 575 transitions, 9434 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:15:22,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 598 transitions, 10954 flow [2024-06-21 20:15:36,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 598 transitions, 10358 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 20:15:36,373 INFO L231 Difference]: Finished difference. Result has 454 places, 574 transitions, 9412 flow [2024-06-21 20:15:36,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8838, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9412, PETRI_PLACES=454, PETRI_TRANSITIONS=574} [2024-06-21 20:15:36,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-21 20:15:36,374 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 574 transitions, 9412 flow [2024-06-21 20:15:36,374 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) [2024-06-21 20:15:36,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:36,374 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] [2024-06-21 20:15:36,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:15:36,375 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:36,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash -374821788, now seen corresponding path program 10 times [2024-06-21 20:15:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:36,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974456916] [2024-06-21 20:15:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:36,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:36,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:36,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974456916] [2024-06-21 20:15:36,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974456916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:36,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:36,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:15:36,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356954636] [2024-06-21 20:15:36,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:36,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:15:36,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:36,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:15:36,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:15:36,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:36,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 574 transitions, 9412 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) [2024-06-21 20:15:36,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:36,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:36,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:39,292 INFO L124 PetriNetUnfolderBase]: 6317/10796 cut-off events. [2024-06-21 20:15:39,292 INFO L125 PetriNetUnfolderBase]: For 2797294/2797294 co-relation queries the response was YES. [2024-06-21 20:15:39,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93535 conditions, 10796 events. 6317/10796 cut-off events. For 2797294/2797294 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 83460 event pairs, 2212 based on Foata normal form. 12/10807 useless extension candidates. Maximal degree in co-relation 93327. Up to 9987 conditions per place. [2024-06-21 20:15:39,455 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 542 selfloop transitions, 42 changer transitions 4/595 dead transitions. [2024-06-21 20:15:39,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 595 transitions, 10697 flow [2024-06-21 20:15:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:15:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:15:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 20:15:39,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 20:15:39,456 INFO L175 Difference]: Start difference. First operand has 454 places, 574 transitions, 9412 flow. Second operand 8 states and 181 transitions. [2024-06-21 20:15:39,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 595 transitions, 10697 flow [2024-06-21 20:15:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 595 transitions, 10031 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 20:15:57,947 INFO L231 Difference]: Finished difference. Result has 454 places, 574 transitions, 8846 flow [2024-06-21 20:15:57,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8846, PETRI_PLACES=454, PETRI_TRANSITIONS=574} [2024-06-21 20:15:57,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-21 20:15:57,948 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 574 transitions, 8846 flow [2024-06-21 20:15:57,948 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) [2024-06-21 20:15:57,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:57,948 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] [2024-06-21 20:15:57,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:15:57,948 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:57,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash -813935722, now seen corresponding path program 11 times [2024-06-21 20:15:57,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:57,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761014975] [2024-06-21 20:15:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:57,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:58,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:58,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761014975] [2024-06-21 20:15:58,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761014975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:58,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:58,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:15:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065663958] [2024-06-21 20:15:58,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:58,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:15:58,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:58,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:15:58,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:15:58,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:58,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 574 transitions, 8846 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) [2024-06-21 20:15:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:58,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:58,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:00,852 INFO L124 PetriNetUnfolderBase]: 6260/10689 cut-off events. [2024-06-21 20:16:00,853 INFO L125 PetriNetUnfolderBase]: For 2742562/2742562 co-relation queries the response was YES. [2024-06-21 20:16:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90782 conditions, 10689 events. 6260/10689 cut-off events. For 2742562/2742562 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 82276 event pairs, 2150 based on Foata normal form. 12/10696 useless extension candidates. Maximal degree in co-relation 90573. Up to 9729 conditions per place. [2024-06-21 20:16:01,024 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 539 selfloop transitions, 47 changer transitions 6/599 dead transitions. [2024-06-21 20:16:01,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 599 transitions, 10152 flow [2024-06-21 20:16:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:16:01,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:16:01,025 INFO L175 Difference]: Start difference. First operand has 454 places, 574 transitions, 8846 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:16:01,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 599 transitions, 10152 flow [2024-06-21 20:16:14,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 599 transitions, 10000 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:14,026 INFO L231 Difference]: Finished difference. Result has 456 places, 572 transitions, 8778 flow [2024-06-21 20:16:14,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8694, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8778, PETRI_PLACES=456, PETRI_TRANSITIONS=572} [2024-06-21 20:16:14,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 20:16:14,027 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 572 transitions, 8778 flow [2024-06-21 20:16:14,027 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) [2024-06-21 20:16:14,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:14,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:16:14,027 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:14,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -387323800, now seen corresponding path program 6 times [2024-06-21 20:16:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457359286] [2024-06-21 20:16:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457359286] [2024-06-21 20:16:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457359286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:14,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:14,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:14,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288350180] [2024-06-21 20:16:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:14,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:14,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:14,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 572 transitions, 8778 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) [2024-06-21 20:16:14,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:14,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:14,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:17,152 INFO L124 PetriNetUnfolderBase]: 6211/10630 cut-off events. [2024-06-21 20:16:17,152 INFO L125 PetriNetUnfolderBase]: For 2764455/2764455 co-relation queries the response was YES. [2024-06-21 20:16:17,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90568 conditions, 10630 events. 6211/10630 cut-off events. For 2764455/2764455 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 81879 event pairs, 2170 based on Foata normal form. 10/10639 useless extension candidates. Maximal degree in co-relation 90358. Up to 9819 conditions per place. [2024-06-21 20:16:17,319 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 532 selfloop transitions, 51 changer transitions 4/594 dead transitions. [2024-06-21 20:16:17,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 594 transitions, 10061 flow [2024-06-21 20:16:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:16:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:16:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 20:16:17,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 20:16:17,320 INFO L175 Difference]: Start difference. First operand has 456 places, 572 transitions, 8778 flow. Second operand 9 states and 199 transitions. [2024-06-21 20:16:17,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 594 transitions, 10061 flow [2024-06-21 20:16:32,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 594 transitions, 9937 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:32,934 INFO L231 Difference]: Finished difference. Result has 459 places, 573 transitions, 8796 flow [2024-06-21 20:16:32,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8654, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8796, PETRI_PLACES=459, PETRI_TRANSITIONS=573} [2024-06-21 20:16:32,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 20:16:32,935 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 573 transitions, 8796 flow [2024-06-21 20:16:32,935 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) [2024-06-21 20:16:32,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:32,935 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] [2024-06-21 20:16:32,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:16:32,935 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:32,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:32,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1004794013, now seen corresponding path program 16 times [2024-06-21 20:16:32,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:32,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288148738] [2024-06-21 20:16:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:32,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:33,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:33,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288148738] [2024-06-21 20:16:33,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288148738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:33,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:33,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886375788] [2024-06-21 20:16:33,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:33,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:33,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:33,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:33,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 573 transitions, 8796 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:33,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:33,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:33,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:35,891 INFO L124 PetriNetUnfolderBase]: 6206/10624 cut-off events. [2024-06-21 20:16:35,892 INFO L125 PetriNetUnfolderBase]: For 2717079/2717082 co-relation queries the response was YES. [2024-06-21 20:16:36,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90767 conditions, 10624 events. 6206/10624 cut-off events. For 2717079/2717082 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 81846 event pairs, 2181 based on Foata normal form. 3/10625 useless extension candidates. Maximal degree in co-relation 90556. Up to 9509 conditions per place. [2024-06-21 20:16:36,069 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 444 selfloop transitions, 154 changer transitions 0/605 dead transitions. [2024-06-21 20:16:36,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 605 transitions, 10661 flow [2024-06-21 20:16:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:16:36,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 20:16:36,070 INFO L175 Difference]: Start difference. First operand has 459 places, 573 transitions, 8796 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:16:36,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 605 transitions, 10661 flow [2024-06-21 20:16:51,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 605 transitions, 10530 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:51,311 INFO L231 Difference]: Finished difference. Result has 460 places, 576 transitions, 9024 flow [2024-06-21 20:16:51,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8665, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9024, PETRI_PLACES=460, PETRI_TRANSITIONS=576} [2024-06-21 20:16:51,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-21 20:16:51,312 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 576 transitions, 9024 flow [2024-06-21 20:16:51,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:51,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:51,313 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] [2024-06-21 20:16:51,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:16:51,313 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:51,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1932498653, now seen corresponding path program 17 times [2024-06-21 20:16:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:51,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897647043] [2024-06-21 20:16:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:51,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897647043] [2024-06-21 20:16:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897647043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:51,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924665080] [2024-06-21 20:16:51,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:51,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:51,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:51,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 576 transitions, 9024 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:51,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:51,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:51,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15