./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:00:46,190 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:00:46,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:00:46,257 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:00:46,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:00:46,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:00:46,284 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:00:46,285 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:00:46,285 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:00:46,288 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:00:46,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:00:46,289 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:00:46,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:00:46,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:00:46,290 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:00:46,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:00:46,291 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:00:46,291 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:00:46,291 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:00:46,292 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:00:46,292 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:00:46,292 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:00:46,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:00:46,293 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:00:46,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:00:46,293 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:00:46,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:00:46,293 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:00:46,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:00:46,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:00:46,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:00:46,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:00:46,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:46,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:00:46,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:00:46,296 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:00:46,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:00:46,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:00:46,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:00:46,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:00:46,298 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:00:46,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:00:46,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:00:46,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:00:46,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:00:46,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:00:46,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:00:46,535 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:00:46,536 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:00:46,537 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 23:00:46,653 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:00:46,653 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:00:46,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:00:47,688 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:00:47,936 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:00:47,942 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:00:47,956 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798ae308a/95bcc4dd517e41af91ea34c074d1621d/FLAGe926e76a6 [2024-06-27 23:00:47,971 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798ae308a/95bcc4dd517e41af91ea34c074d1621d [2024-06-27 23:00:47,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:00:47,973 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:00:47,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:47,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:00:47,979 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:00:47,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:46" (1/2) ... [2024-06-27 23:00:47,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca4d901 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:47, skipping insertion in model container [2024-06-27 23:00:47,981 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:46" (1/2) ... [2024-06-27 23:00:47,982 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62a4b757 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:47, skipping insertion in model container [2024-06-27 23:00:47,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:47" (2/2) ... [2024-06-27 23:00:47,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca4d901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:47, skipping insertion in model container [2024-06-27 23:00:47,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:47" (2/2) ... [2024-06-27 23:00:47,984 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:00:48,005 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:00:48,006 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 23:00:48,006 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 23:00:48,007 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 23:00:48,007 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:00:48,007 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 23:00:48,042 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:00:48,333 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:48,344 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:00:48,433 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:48,494 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:00:48,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48 WrapperNode [2024-06-27 23:00:48,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:48,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:48,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:00:48,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:00:48,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,527 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-27 23:00:48,527 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:48,528 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:00:48,528 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:00:48,528 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:00:48,536 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,552 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]. [2024-06-27 23:00:48,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,556 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,559 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,560 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:00:48,561 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:00:48,561 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:00:48,561 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:00:48,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (1/1) ... [2024-06-27 23:00:48,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:48,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:00:48,625 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) [2024-06-27 23:00:48,648 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 [2024-06-27 23:00:48,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:00:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:00:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:00:48,665 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:00:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:00:48,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:00:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:00:48,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:00:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:00:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:00:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:00:48,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:00:48,668 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:00:48,753 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:00:48,756 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:00:48,898 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:00:48,899 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:00:48,974 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:00:48,981 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:00:48,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:48 BoogieIcfgContainer [2024-06-27 23:00:48,981 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:00:48,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:00:48,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:00:48,985 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:00:48,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:46" (1/4) ... [2024-06-27 23:00:48,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207fcc29 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:00:48, skipping insertion in model container [2024-06-27 23:00:48,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:00:47" (2/4) ... [2024-06-27 23:00:48,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207fcc29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:00:48, skipping insertion in model container [2024-06-27 23:00:48,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:48" (3/4) ... [2024-06-27 23:00:48,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207fcc29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:00:48, skipping insertion in model container [2024-06-27 23:00:48,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:48" (4/4) ... [2024-06-27 23:00:48,989 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:00:49,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:00:49,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:00:49,003 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:00:49,039 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:00:49,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 23:00:49,094 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 23:00:49,095 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:49,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:00:49,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 23:00:49,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 23:00:49,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:00:49,112 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;@775b4ed4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:00:49,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:00:49,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:00:49,120 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:00:49,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:49,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:49,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:00:49,122 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)] === [2024-06-27 23:00:49,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-27 23:00:49,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:49,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42674220] [2024-06-27 23:00:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:49,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:49,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42674220] [2024-06-27 23:00:49,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42674220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:00:49,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623575086] [2024-06-27 23:00:49,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:00:49,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:00:49,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:00:49,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-27 23:00:49,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:49,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-27 23:00:49,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:49,689 INFO L124 PetriNetUnfolderBase]: 438/757 cut-off events. [2024-06-27 23:00:49,690 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 23:00:49,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1500 conditions, 757 events. 438/757 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3812 event pairs, 278 based on Foata normal form. 1/713 useless extension candidates. Maximal degree in co-relation 1488. Up to 688 conditions per place. [2024-06-27 23:00:49,700 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 23:00:49,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-27 23:00:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:00:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:00:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-27 23:00:49,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-27 23:00:49,711 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-27 23:00:49,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-27 23:00:49,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:49,716 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 23:00:49,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 23:00:49,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 23:00:49,720 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 23:00:49,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:49,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:49,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:00:49,721 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)] === [2024-06-27 23:00:49,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-27 23:00:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:49,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894565397] [2024-06-27 23:00:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:49,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:49,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894565397] [2024-06-27 23:00:49,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894565397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:00:49,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922191012] [2024-06-27 23:00:49,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:00:49,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:00:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:00:49,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:49,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:49,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:49,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,010 INFO L124 PetriNetUnfolderBase]: 528/890 cut-off events. [2024-06-27 23:00:50,011 INFO L125 PetriNetUnfolderBase]: For 184/211 co-relation queries the response was YES. [2024-06-27 23:00:50,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 890 events. 528/890 cut-off events. For 184/211 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4488 event pairs, 282 based on Foata normal form. 6/884 useless extension candidates. Maximal degree in co-relation 2049. Up to 805 conditions per place. [2024-06-27 23:00:50,030 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 35 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 23:00:50,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 230 flow [2024-06-27 23:00:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-27 23:00:50,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6890243902439024 [2024-06-27 23:00:50,035 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 113 transitions. [2024-06-27 23:00:50,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 230 flow [2024-06-27 23:00:50,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:50,039 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 23:00:50,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 23:00:50,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 23:00:50,040 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 23:00:50,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:00:50,041 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)] === [2024-06-27 23:00:50,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1652603324, now seen corresponding path program 1 times [2024-06-27 23:00:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400225184] [2024-06-27 23:00:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:50,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400225184] [2024-06-27 23:00:50,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400225184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:50,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271304682] [2024-06-27 23:00:50,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:50,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:50,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:50,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2024-06-27 23:00:50,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:50,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,386 INFO L124 PetriNetUnfolderBase]: 522/878 cut-off events. [2024-06-27 23:00:50,386 INFO L125 PetriNetUnfolderBase]: For 534/599 co-relation queries the response was YES. [2024-06-27 23:00:50,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2319 conditions, 878 events. 522/878 cut-off events. For 534/599 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4394 event pairs, 214 based on Foata normal form. 9/877 useless extension candidates. Maximal degree in co-relation 2305. Up to 781 conditions per place. [2024-06-27 23:00:50,392 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 42 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-27 23:00:50,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 308 flow [2024-06-27 23:00:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 23:00:50,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-27 23:00:50,394 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 140 transitions. [2024-06-27 23:00:50,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 308 flow [2024-06-27 23:00:50,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 294 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:50,396 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-27 23:00:50,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 23:00:50,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-27 23:00:50,397 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-27 23:00:50,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2024-06-27 23:00:50,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:00:50,398 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)] === [2024-06-27 23:00:50,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-27 23:00:50,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789252609] [2024-06-27 23:00:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:50,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789252609] [2024-06-27 23:00:50,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789252609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:50,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687289955] [2024-06-27 23:00:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:50,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:50,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:50,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:50,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,694 INFO L124 PetriNetUnfolderBase]: 554/936 cut-off events. [2024-06-27 23:00:50,694 INFO L125 PetriNetUnfolderBase]: For 1135/1228 co-relation queries the response was YES. [2024-06-27 23:00:50,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 936 events. 554/936 cut-off events. For 1135/1228 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4700 event pairs, 177 based on Foata normal form. 27/939 useless extension candidates. Maximal degree in co-relation 2718. Up to 733 conditions per place. [2024-06-27 23:00:50,700 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 49 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-27 23:00:50,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 372 flow [2024-06-27 23:00:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 23:00:50,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-27 23:00:50,702 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 165 transitions. [2024-06-27 23:00:50,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 372 flow [2024-06-27 23:00:50,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 348 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:50,705 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 179 flow [2024-06-27 23:00:50,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-27 23:00:50,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 23:00:50,706 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 179 flow [2024-06-27 23:00:50,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:00:50,707 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)] === [2024-06-27 23:00:50,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1439162230, now seen corresponding path program 1 times [2024-06-27 23:00:50,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115645164] [2024-06-27 23:00:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115645164] [2024-06-27 23:00:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115645164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:50,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078748000] [2024-06-27 23:00:50,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:50,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 23:00:50,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 23:00:50,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,994 INFO L124 PetriNetUnfolderBase]: 742/1300 cut-off events. [2024-06-27 23:00:50,994 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-06-27 23:00:50,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1300 events. 742/1300 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6774 event pairs, 259 based on Foata normal form. 4/1276 useless extension candidates. Maximal degree in co-relation 3675. Up to 1110 conditions per place. [2024-06-27 23:00:51,002 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 45 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2024-06-27 23:00:51,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 359 flow [2024-06-27 23:00:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 23:00:51,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 23:00:51,004 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 179 flow. Second operand 5 states and 129 transitions. [2024-06-27 23:00:51,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 359 flow [2024-06-27 23:00:51,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:51,012 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 221 flow [2024-06-27 23:00:51,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 23:00:51,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-27 23:00:51,014 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 221 flow [2024-06-27 23:00:51,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:00:51,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:51,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1023193463, now seen corresponding path program 1 times [2024-06-27 23:00:51,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255787292] [2024-06-27 23:00:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255787292] [2024-06-27 23:00:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255787292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:00:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932581902] [2024-06-27 23:00:51,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:00:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:00:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:00:51,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-27 23:00:51,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:51,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-27 23:00:51,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:51,315 INFO L124 PetriNetUnfolderBase]: 510/893 cut-off events. [2024-06-27 23:00:51,316 INFO L125 PetriNetUnfolderBase]: For 1951/2048 co-relation queries the response was YES. [2024-06-27 23:00:51,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 893 events. 510/893 cut-off events. For 1951/2048 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4473 event pairs, 197 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 2899. Up to 797 conditions per place. [2024-06-27 23:00:51,321 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 37 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 23:00:51,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 343 flow [2024-06-27 23:00:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:00:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:00:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 23:00:51,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-27 23:00:51,322 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 221 flow. Second operand 3 states and 86 transitions. [2024-06-27 23:00:51,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 343 flow [2024-06-27 23:00:51,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 320 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:51,327 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 243 flow [2024-06-27 23:00:51,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-06-27 23:00:51,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-27 23:00:51,330 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 243 flow [2024-06-27 23:00:51,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:00:51,331 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)] === [2024-06-27 23:00:51,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,331 INFO L85 PathProgramCache]: Analyzing trace with hash 166448715, now seen corresponding path program 1 times [2024-06-27 23:00:51,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269268317] [2024-06-27 23:00:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:51,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269268317] [2024-06-27 23:00:51,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269268317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049409123] [2024-06-27 23:00:51,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:51,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:51,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:00:51,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:51,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:00:51,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:51,791 INFO L124 PetriNetUnfolderBase]: 922/1527 cut-off events. [2024-06-27 23:00:51,791 INFO L125 PetriNetUnfolderBase]: For 3425/3428 co-relation queries the response was YES. [2024-06-27 23:00:51,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4954 conditions, 1527 events. 922/1527 cut-off events. For 3425/3428 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7748 event pairs, 309 based on Foata normal form. 4/1525 useless extension candidates. Maximal degree in co-relation 4935. Up to 1327 conditions per place. [2024-06-27 23:00:51,801 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-27 23:00:51,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 483 flow [2024-06-27 23:00:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 23:00:51,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 23:00:51,802 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 243 flow. Second operand 6 states and 153 transitions. [2024-06-27 23:00:51,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 483 flow [2024-06-27 23:00:51,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 470 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:51,806 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 313 flow [2024-06-27 23:00:51,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 23:00:51,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-27 23:00:51,807 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 313 flow [2024-06-27 23:00:51,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:00:51,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:51,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1215598980, now seen corresponding path program 1 times [2024-06-27 23:00:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006490697] [2024-06-27 23:00:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:51,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006490697] [2024-06-27 23:00:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006490697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:51,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701444645] [2024-06-27 23:00:51,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:51,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:51,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:51,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 313 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-27 23:00:51,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:51,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:51,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,055 INFO L124 PetriNetUnfolderBase]: 698/1188 cut-off events. [2024-06-27 23:00:52,056 INFO L125 PetriNetUnfolderBase]: For 3846/3908 co-relation queries the response was YES. [2024-06-27 23:00:52,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 1188 events. 698/1188 cut-off events. For 3846/3908 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6039 event pairs, 239 based on Foata normal form. 3/1172 useless extension candidates. Maximal degree in co-relation 4305. Up to 1033 conditions per place. [2024-06-27 23:00:52,064 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 49 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-27 23:00:52,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 553 flow [2024-06-27 23:00:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-27 23:00:52,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-27 23:00:52,068 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 313 flow. Second operand 5 states and 134 transitions. [2024-06-27 23:00:52,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 553 flow [2024-06-27 23:00:52,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 514 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:52,077 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 386 flow [2024-06-27 23:00:52,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-27 23:00:52,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-27 23:00:52,079 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 386 flow [2024-06-27 23:00:52,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-27 23:00:52,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:00:52,080 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)] === [2024-06-27 23:00:52,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash 55122551, now seen corresponding path program 2 times [2024-06-27 23:00:52,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111938958] [2024-06-27 23:00:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:52,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111938958] [2024-06-27 23:00:52,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111938958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109391965] [2024-06-27 23:00:52,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:52,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:52,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:00:52,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 386 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:00:52,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,415 INFO L124 PetriNetUnfolderBase]: 954/1602 cut-off events. [2024-06-27 23:00:52,415 INFO L125 PetriNetUnfolderBase]: For 5891/5894 co-relation queries the response was YES. [2024-06-27 23:00:52,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5860 conditions, 1602 events. 954/1602 cut-off events. For 5891/5894 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8264 event pairs, 330 based on Foata normal form. 6/1601 useless extension candidates. Maximal degree in co-relation 5836. Up to 1375 conditions per place. [2024-06-27 23:00:52,426 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-27 23:00:52,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 639 flow [2024-06-27 23:00:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 23:00:52,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 23:00:52,428 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 386 flow. Second operand 6 states and 149 transitions. [2024-06-27 23:00:52,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 639 flow [2024-06-27 23:00:52,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 627 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:52,437 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 458 flow [2024-06-27 23:00:52,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 23:00:52,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 23:00:52,438 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 458 flow [2024-06-27 23:00:52,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:00:52,439 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)] === [2024-06-27 23:00:52,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash 275636605, now seen corresponding path program 3 times [2024-06-27 23:00:52,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815551635] [2024-06-27 23:00:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:52,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815551635] [2024-06-27 23:00:52,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815551635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:52,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087923067] [2024-06-27 23:00:52,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:52,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:52,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:00:52,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 458 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:00:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,748 INFO L124 PetriNetUnfolderBase]: 946/1589 cut-off events. [2024-06-27 23:00:52,748 INFO L125 PetriNetUnfolderBase]: For 7188/7191 co-relation queries the response was YES. [2024-06-27 23:00:52,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 1589 events. 946/1589 cut-off events. For 7188/7191 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8189 event pairs, 278 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 6023. Up to 1304 conditions per place. [2024-06-27 23:00:52,759 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-27 23:00:52,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 706 flow [2024-06-27 23:00:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 23:00:52,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 23:00:52,761 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 458 flow. Second operand 6 states and 150 transitions. [2024-06-27 23:00:52,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 706 flow [2024-06-27 23:00:52,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 667 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:52,770 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 500 flow [2024-06-27 23:00:52,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=500, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-27 23:00:52,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-27 23:00:52,771 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 500 flow [2024-06-27 23:00:52,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:00:52,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:52,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1258856070, now seen corresponding path program 2 times [2024-06-27 23:00:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616509038] [2024-06-27 23:00:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:52,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616509038] [2024-06-27 23:00:52,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616509038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:52,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654478239] [2024-06-27 23:00:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:52,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:52,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:52,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:52,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-27 23:00:52,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:52,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:53,057 INFO L124 PetriNetUnfolderBase]: 702/1201 cut-off events. [2024-06-27 23:00:53,057 INFO L125 PetriNetUnfolderBase]: For 7054/7127 co-relation queries the response was YES. [2024-06-27 23:00:53,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 1201 events. 702/1201 cut-off events. For 7054/7127 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6170 event pairs, 242 based on Foata normal form. 3/1185 useless extension candidates. Maximal degree in co-relation 4998. Up to 1043 conditions per place. [2024-06-27 23:00:53,066 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 54 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-27 23:00:53,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 680 flow [2024-06-27 23:00:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-27 23:00:53,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-27 23:00:53,068 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 500 flow. Second operand 4 states and 112 transitions. [2024-06-27 23:00:53,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 680 flow [2024-06-27 23:00:53,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 609 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:53,081 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 481 flow [2024-06-27 23:00:53,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=481, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-27 23:00:53,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-27 23:00:53,082 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 481 flow [2024-06-27 23:00:53,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-27 23:00:53,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:00:53,082 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:53,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 190543555, now seen corresponding path program 1 times [2024-06-27 23:00:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943991830] [2024-06-27 23:00:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:53,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943991830] [2024-06-27 23:00:53,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943991830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:53,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784200245] [2024-06-27 23:00:53,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:53,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:53,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:53,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:53,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 481 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:53,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:53,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:53,465 INFO L124 PetriNetUnfolderBase]: 710/1215 cut-off events. [2024-06-27 23:00:53,480 INFO L125 PetriNetUnfolderBase]: For 7902/7975 co-relation queries the response was YES. [2024-06-27 23:00:53,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5119 conditions, 1215 events. 710/1215 cut-off events. For 7902/7975 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6209 event pairs, 235 based on Foata normal form. 3/1199 useless extension candidates. Maximal degree in co-relation 5089. Up to 1031 conditions per place. [2024-06-27 23:00:53,489 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 53 selfloop transitions, 28 changer transitions 0/93 dead transitions. [2024-06-27 23:00:53,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 763 flow [2024-06-27 23:00:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 23:00:53,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 23:00:53,492 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 481 flow. Second operand 6 states and 157 transitions. [2024-06-27 23:00:53,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 763 flow [2024-06-27 23:00:53,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 717 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:53,525 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 561 flow [2024-06-27 23:00:53,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=561, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-27 23:00:53,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-27 23:00:53,526 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 561 flow [2024-06-27 23:00:53,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:00:53,527 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:53,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash 208654335, now seen corresponding path program 2 times [2024-06-27 23:00:53,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305783986] [2024-06-27 23:00:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:53,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305783986] [2024-06-27 23:00:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305783986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:53,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425581321] [2024-06-27 23:00:53,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:53,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:53,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 561 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:53,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:53,813 INFO L124 PetriNetUnfolderBase]: 718/1235 cut-off events. [2024-06-27 23:00:53,813 INFO L125 PetriNetUnfolderBase]: For 8575/8648 co-relation queries the response was YES. [2024-06-27 23:00:53,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 1235 events. 718/1235 cut-off events. For 8575/8648 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6365 event pairs, 242 based on Foata normal form. 3/1219 useless extension candidates. Maximal degree in co-relation 5376. Up to 1055 conditions per place. [2024-06-27 23:00:53,822 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 58 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-27 23:00:53,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 793 flow [2024-06-27 23:00:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-06-27 23:00:53,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6951219512195121 [2024-06-27 23:00:53,823 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 561 flow. Second operand 4 states and 114 transitions. [2024-06-27 23:00:53,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 793 flow [2024-06-27 23:00:53,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 756 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:53,834 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 630 flow [2024-06-27 23:00:53,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=630, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-27 23:00:53,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-27 23:00:53,835 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 630 flow [2024-06-27 23:00:53,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:00:53,836 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)] === [2024-06-27 23:00:53,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash 208208865, now seen corresponding path program 3 times [2024-06-27 23:00:53,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208206734] [2024-06-27 23:00:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208206734] [2024-06-27 23:00:53,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208206734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341641189] [2024-06-27 23:00:53,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:53,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:53,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:54,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:54,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,110 INFO L124 PetriNetUnfolderBase]: 713/1228 cut-off events. [2024-06-27 23:00:54,110 INFO L125 PetriNetUnfolderBase]: For 9634/9707 co-relation queries the response was YES. [2024-06-27 23:00:54,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1228 events. 713/1228 cut-off events. For 9634/9707 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6337 event pairs, 242 based on Foata normal form. 3/1212 useless extension candidates. Maximal degree in co-relation 5516. Up to 1036 conditions per place. [2024-06-27 23:00:54,119 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 53 selfloop transitions, 29 changer transitions 0/94 dead transitions. [2024-06-27 23:00:54,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 832 flow [2024-06-27 23:00:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 23:00:54,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 23:00:54,120 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 630 flow. Second operand 5 states and 135 transitions. [2024-06-27 23:00:54,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 832 flow [2024-06-27 23:00:54,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 94 transitions, 760 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:54,132 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 626 flow [2024-06-27 23:00:54,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-27 23:00:54,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-27 23:00:54,133 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 626 flow [2024-06-27 23:00:54,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:00:54,134 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:54,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-27 23:00:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447341536] [2024-06-27 23:00:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447341536] [2024-06-27 23:00:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447341536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:54,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56981897] [2024-06-27 23:00:54,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:54,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:54,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 626 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:54,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,417 INFO L124 PetriNetUnfolderBase]: 687/1190 cut-off events. [2024-06-27 23:00:54,417 INFO L125 PetriNetUnfolderBase]: For 9682/9755 co-relation queries the response was YES. [2024-06-27 23:00:54,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5243 conditions, 1190 events. 687/1190 cut-off events. For 9682/9755 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6112 event pairs, 227 based on Foata normal form. 13/1184 useless extension candidates. Maximal degree in co-relation 5211. Up to 984 conditions per place. [2024-06-27 23:00:54,425 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 72 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 23:00:54,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 848 flow [2024-06-27 23:00:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-27 23:00:54,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-27 23:00:54,426 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 626 flow. Second operand 4 states and 112 transitions. [2024-06-27 23:00:54,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 848 flow [2024-06-27 23:00:54,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 778 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:54,435 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 586 flow [2024-06-27 23:00:54,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=586, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-27 23:00:54,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-27 23:00:54,436 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 586 flow [2024-06-27 23:00:54,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:00:54,437 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:54,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash -50933405, now seen corresponding path program 1 times [2024-06-27 23:00:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428214360] [2024-06-27 23:00:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:54,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428214360] [2024-06-27 23:00:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428214360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:54,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210151148] [2024-06-27 23:00:54,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:54,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:54,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:54,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 586 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:54,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,736 INFO L124 PetriNetUnfolderBase]: 689/1189 cut-off events. [2024-06-27 23:00:54,736 INFO L125 PetriNetUnfolderBase]: For 8709/8749 co-relation queries the response was YES. [2024-06-27 23:00:54,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5210 conditions, 1189 events. 689/1189 cut-off events. For 8709/8749 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6087 event pairs, 205 based on Foata normal form. 14/1187 useless extension candidates. Maximal degree in co-relation 5178. Up to 986 conditions per place. [2024-06-27 23:00:54,743 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 69 selfloop transitions, 27 changer transitions 0/108 dead transitions. [2024-06-27 23:00:54,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 108 transitions, 904 flow [2024-06-27 23:00:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 23:00:54,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 23:00:54,744 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 586 flow. Second operand 6 states and 162 transitions. [2024-06-27 23:00:54,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 108 transitions, 904 flow [2024-06-27 23:00:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 888 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:54,753 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 680 flow [2024-06-27 23:00:54,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2024-06-27 23:00:54,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-27 23:00:54,753 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 680 flow [2024-06-27 23:00:54,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:00:54,754 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:54,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1043442410, now seen corresponding path program 1 times [2024-06-27 23:00:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166432762] [2024-06-27 23:00:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:54,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166432762] [2024-06-27 23:00:54,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166432762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:54,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202849738] [2024-06-27 23:00:54,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:54,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:54,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:54,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:00:54,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 680 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:00:54,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,115 INFO L124 PetriNetUnfolderBase]: 1050/1809 cut-off events. [2024-06-27 23:00:55,115 INFO L125 PetriNetUnfolderBase]: For 12981/12984 co-relation queries the response was YES. [2024-06-27 23:00:55,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7552 conditions, 1809 events. 1050/1809 cut-off events. For 12981/12984 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9876 event pairs, 278 based on Foata normal form. 12/1817 useless extension candidates. Maximal degree in co-relation 7519. Up to 1327 conditions per place. [2024-06-27 23:00:55,128 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2024-06-27 23:00:55,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 1079 flow [2024-06-27 23:00:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 23:00:55,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 23:00:55,129 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 680 flow. Second operand 7 states and 181 transitions. [2024-06-27 23:00:55,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 1079 flow [2024-06-27 23:00:55,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1036 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:55,147 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 768 flow [2024-06-27 23:00:55,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=768, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2024-06-27 23:00:55,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 23:00:55,148 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 768 flow [2024-06-27 23:00:55,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:00:55,149 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:55,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1601694295, now seen corresponding path program 2 times [2024-06-27 23:00:55,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075281748] [2024-06-27 23:00:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:55,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:55,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075281748] [2024-06-27 23:00:55,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075281748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:55,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:55,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:55,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76634357] [2024-06-27 23:00:55,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:55,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:55,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:55,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 768 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:55,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:55,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,499 INFO L124 PetriNetUnfolderBase]: 810/1427 cut-off events. [2024-06-27 23:00:55,499 INFO L125 PetriNetUnfolderBase]: For 12074/12188 co-relation queries the response was YES. [2024-06-27 23:00:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6586 conditions, 1427 events. 810/1427 cut-off events. For 12074/12188 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7756 event pairs, 237 based on Foata normal form. 4/1410 useless extension candidates. Maximal degree in co-relation 6549. Up to 1175 conditions per place. [2024-06-27 23:00:55,509 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-27 23:00:55,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 1056 flow [2024-06-27 23:00:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 23:00:55,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 23:00:55,510 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 768 flow. Second operand 6 states and 157 transitions. [2024-06-27 23:00:55,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 1056 flow [2024-06-27 23:00:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 111 transitions, 1017 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:55,524 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 821 flow [2024-06-27 23:00:55,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=821, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-27 23:00:55,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-27 23:00:55,524 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 821 flow [2024-06-27 23:00:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:00:55,525 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)] === [2024-06-27 23:00:55,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1704192316, now seen corresponding path program 2 times [2024-06-27 23:00:55,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511685657] [2024-06-27 23:00:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:55,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:55,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511685657] [2024-06-27 23:00:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511685657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:55,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211568712] [2024-06-27 23:00:55,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:55,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:55,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:00:55,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 821 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:55,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:00:55,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,914 INFO L124 PetriNetUnfolderBase]: 1147/1966 cut-off events. [2024-06-27 23:00:55,914 INFO L125 PetriNetUnfolderBase]: For 16714/16717 co-relation queries the response was YES. [2024-06-27 23:00:55,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8573 conditions, 1966 events. 1147/1966 cut-off events. For 16714/16717 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10962 event pairs, 335 based on Foata normal form. 14/1969 useless extension candidates. Maximal degree in co-relation 8535. Up to 1490 conditions per place. [2024-06-27 23:00:55,933 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-27 23:00:55,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 1214 flow [2024-06-27 23:00:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 23:00:55,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 23:00:55,935 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 821 flow. Second operand 7 states and 178 transitions. [2024-06-27 23:00:55,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 1214 flow [2024-06-27 23:00:55,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1161 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:55,958 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 889 flow [2024-06-27 23:00:55,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-06-27 23:00:55,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 23:00:55,959 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 889 flow [2024-06-27 23:00:55,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:00:55,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:55,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash -685071406, now seen corresponding path program 3 times [2024-06-27 23:00:55,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821791153] [2024-06-27 23:00:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:56,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821791153] [2024-06-27 23:00:56,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821791153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:56,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:56,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:56,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157426297] [2024-06-27 23:00:56,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:56,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:56,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:56,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:00:56,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 889 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:56,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:00:56,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,329 INFO L124 PetriNetUnfolderBase]: 1127/1938 cut-off events. [2024-06-27 23:00:56,329 INFO L125 PetriNetUnfolderBase]: For 17713/17716 co-relation queries the response was YES. [2024-06-27 23:00:56,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8438 conditions, 1938 events. 1127/1938 cut-off events. For 17713/17716 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10829 event pairs, 284 based on Foata normal form. 14/1941 useless extension candidates. Maximal degree in co-relation 8398. Up to 1169 conditions per place. [2024-06-27 23:00:56,342 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 31 changer transitions 0/129 dead transitions. [2024-06-27 23:00:56,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 129 transitions, 1207 flow [2024-06-27 23:00:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 23:00:56,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 23:00:56,344 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 889 flow. Second operand 7 states and 177 transitions. [2024-06-27 23:00:56,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 129 transitions, 1207 flow [2024-06-27 23:00:56,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 129 transitions, 1161 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:56,364 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 887 flow [2024-06-27 23:00:56,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=95, 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=7, PETRI_FLOW=887, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-06-27 23:00:56,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-27 23:00:56,365 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 887 flow [2024-06-27 23:00:56,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:56,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:00:56,365 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:56,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash 303628165, now seen corresponding path program 3 times [2024-06-27 23:00:56,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:56,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942607633] [2024-06-27 23:00:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:56,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:56,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942607633] [2024-06-27 23:00:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942607633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:56,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:56,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253180089] [2024-06-27 23:00:56,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:56,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:56,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:56,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:56,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 887 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:56,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:56,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,640 INFO L124 PetriNetUnfolderBase]: 867/1535 cut-off events. [2024-06-27 23:00:56,640 INFO L125 PetriNetUnfolderBase]: For 14965/15079 co-relation queries the response was YES. [2024-06-27 23:00:56,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7033 conditions, 1535 events. 867/1535 cut-off events. For 14965/15079 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8605 event pairs, 248 based on Foata normal form. 4/1518 useless extension candidates. Maximal degree in co-relation 6991. Up to 1280 conditions per place. [2024-06-27 23:00:56,650 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 73 selfloop transitions, 32 changer transitions 0/118 dead transitions. [2024-06-27 23:00:56,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 118 transitions, 1151 flow [2024-06-27 23:00:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-27 23:00:56,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2024-06-27 23:00:56,651 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 887 flow. Second operand 5 states and 139 transitions. [2024-06-27 23:00:56,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 118 transitions, 1151 flow [2024-06-27 23:00:56,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 118 transitions, 1067 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:56,676 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 888 flow [2024-06-27 23:00:56,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=888, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-06-27 23:00:56,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-27 23:00:56,677 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 888 flow [2024-06-27 23:00:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:56,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:00:56,677 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:56,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1896337596, now seen corresponding path program 1 times [2024-06-27 23:00:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:56,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450829883] [2024-06-27 23:00:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:56,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450829883] [2024-06-27 23:00:56,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450829883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:56,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:56,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:56,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039025150] [2024-06-27 23:00:56,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:56,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:56,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:56,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 888 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:56,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:56,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,963 INFO L124 PetriNetUnfolderBase]: 875/1551 cut-off events. [2024-06-27 23:00:56,963 INFO L125 PetriNetUnfolderBase]: For 15468/15582 co-relation queries the response was YES. [2024-06-27 23:00:56,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7064 conditions, 1551 events. 875/1551 cut-off events. For 15468/15582 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8708 event pairs, 248 based on Foata normal form. 4/1534 useless extension candidates. Maximal degree in co-relation 7021. Up to 1238 conditions per place. [2024-06-27 23:00:56,974 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 48 changer transitions 0/127 dead transitions. [2024-06-27 23:00:56,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1268 flow [2024-06-27 23:00:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 23:00:56,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-27 23:00:56,977 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 888 flow. Second operand 7 states and 185 transitions. [2024-06-27 23:00:56,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1268 flow [2024-06-27 23:00:56,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 127 transitions, 1182 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:57,000 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 972 flow [2024-06-27 23:00:57,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2024-06-27 23:00:57,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-27 23:00:57,001 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 972 flow [2024-06-27 23:00:57,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:57,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:57,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:00:57,003 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:57,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:57,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1571596476, now seen corresponding path program 2 times [2024-06-27 23:00:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:57,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346251261] [2024-06-27 23:00:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:57,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346251261] [2024-06-27 23:00:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346251261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:57,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:57,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891637386] [2024-06-27 23:00:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:57,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:57,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:57,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:57,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 972 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:57,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:57,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:57,321 INFO L124 PetriNetUnfolderBase]: 896/1590 cut-off events. [2024-06-27 23:00:57,321 INFO L125 PetriNetUnfolderBase]: For 14730/14844 co-relation queries the response was YES. [2024-06-27 23:00:57,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7410 conditions, 1590 events. 896/1590 cut-off events. For 14730/14844 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8971 event pairs, 248 based on Foata normal form. 4/1573 useless extension candidates. Maximal degree in co-relation 7368. Up to 1263 conditions per place. [2024-06-27 23:00:57,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 64 selfloop transitions, 51 changer transitions 0/128 dead transitions. [2024-06-27 23:00:57,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 128 transitions, 1380 flow [2024-06-27 23:00:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 23:00:57,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 23:00:57,333 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 972 flow. Second operand 7 states and 182 transitions. [2024-06-27 23:00:57,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 128 transitions, 1380 flow [2024-06-27 23:00:57,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 128 transitions, 1303 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:57,355 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 1071 flow [2024-06-27 23:00:57,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-06-27 23:00:57,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 23:00:57,356 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 1071 flow [2024-06-27 23:00:57,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:57,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:57,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:00:57,357 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:57,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:57,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1571210526, now seen corresponding path program 3 times [2024-06-27 23:00:57,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:57,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373985252] [2024-06-27 23:00:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:57,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:57,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:57,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373985252] [2024-06-27 23:00:57,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373985252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:57,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:57,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:57,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301892729] [2024-06-27 23:00:57,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:57,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:57,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:57,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:57,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:57,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:57,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:57,665 INFO L124 PetriNetUnfolderBase]: 891/1583 cut-off events. [2024-06-27 23:00:57,665 INFO L125 PetriNetUnfolderBase]: For 15582/15696 co-relation queries the response was YES. [2024-06-27 23:00:57,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7510 conditions, 1583 events. 891/1583 cut-off events. For 15582/15696 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8931 event pairs, 248 based on Foata normal form. 4/1566 useless extension candidates. Maximal degree in co-relation 7466. Up to 1258 conditions per place. [2024-06-27 23:00:57,675 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 52 changer transitions 0/127 dead transitions. [2024-06-27 23:00:57,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 127 transitions, 1377 flow [2024-06-27 23:00:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 23:00:57,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-27 23:00:57,677 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 1071 flow. Second operand 7 states and 180 transitions. [2024-06-27 23:00:57,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 127 transitions, 1377 flow [2024-06-27 23:00:57,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 127 transitions, 1286 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:57,697 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 1090 flow [2024-06-27 23:00:57,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1090, PETRI_PLACES=111, PETRI_TRANSITIONS=109} [2024-06-27 23:00:57,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-27 23:00:57,698 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 1090 flow [2024-06-27 23:00:57,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:57,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:57,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:00:57,698 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)] === [2024-06-27 23:00:57,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:57,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-27 23:00:57,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:57,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616467462] [2024-06-27 23:00:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:57,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:57,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:57,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616467462] [2024-06-27 23:00:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616467462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:57,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:57,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079555431] [2024-06-27 23:00:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:57,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:57,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:57,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:57,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 1090 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:57,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:57,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:58,067 INFO L124 PetriNetUnfolderBase]: 923/1635 cut-off events. [2024-06-27 23:00:58,067 INFO L125 PetriNetUnfolderBase]: For 18637/18751 co-relation queries the response was YES. [2024-06-27 23:00:58,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 1635 events. 923/1635 cut-off events. For 18637/18751 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9286 event pairs, 252 based on Foata normal form. 12/1626 useless extension candidates. Maximal degree in co-relation 7801. Up to 1355 conditions per place. [2024-06-27 23:00:58,079 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-27 23:00:58,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 131 transitions, 1412 flow [2024-06-27 23:00:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 23:00:58,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 23:00:58,080 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 1090 flow. Second operand 7 states and 178 transitions. [2024-06-27 23:00:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 131 transitions, 1412 flow [2024-06-27 23:00:58,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 131 transitions, 1300 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:58,102 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 1063 flow [2024-06-27 23:00:58,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=112, PETRI_TRANSITIONS=110} [2024-06-27 23:00:58,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-27 23:00:58,102 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 1063 flow [2024-06-27 23:00:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:58,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:58,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:00:58,103 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)] === [2024-06-27 23:00:58,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1346620130, now seen corresponding path program 4 times [2024-06-27 23:00:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332915783] [2024-06-27 23:00:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:58,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:58,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332915783] [2024-06-27 23:00:58,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332915783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:58,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:58,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072956839] [2024-06-27 23:00:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:58,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:58,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:58,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:58,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:58,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:58,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:58,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:58,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:58,443 INFO L124 PetriNetUnfolderBase]: 931/1651 cut-off events. [2024-06-27 23:00:58,443 INFO L125 PetriNetUnfolderBase]: For 18565/18679 co-relation queries the response was YES. [2024-06-27 23:00:58,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7960 conditions, 1651 events. 931/1651 cut-off events. For 18565/18679 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9407 event pairs, 252 based on Foata normal form. 4/1634 useless extension candidates. Maximal degree in co-relation 7914. Up to 1362 conditions per place. [2024-06-27 23:00:58,455 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 81 selfloop transitions, 40 changer transitions 0/134 dead transitions. [2024-06-27 23:00:58,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 134 transitions, 1390 flow [2024-06-27 23:00:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-27 23:00:58,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6926829268292682 [2024-06-27 23:00:58,457 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 1063 flow. Second operand 5 states and 142 transitions. [2024-06-27 23:00:58,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 134 transitions, 1390 flow [2024-06-27 23:00:58,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 134 transitions, 1323 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:58,482 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 1138 flow [2024-06-27 23:00:58,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1138, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2024-06-27 23:00:58,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-27 23:00:58,483 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 1138 flow [2024-06-27 23:00:58,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:58,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:58,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:00:58,484 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:58,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1775091590, now seen corresponding path program 5 times [2024-06-27 23:00:58,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:58,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676732299] [2024-06-27 23:00:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:58,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:58,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:58,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676732299] [2024-06-27 23:00:58,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676732299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:58,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:58,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:58,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330170821] [2024-06-27 23:00:58,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:58,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:58,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:58,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:58,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 1138 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:58,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:58,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:58,808 INFO L124 PetriNetUnfolderBase]: 939/1667 cut-off events. [2024-06-27 23:00:58,808 INFO L125 PetriNetUnfolderBase]: For 20038/20152 co-relation queries the response was YES. [2024-06-27 23:00:58,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 1667 events. 939/1667 cut-off events. For 20038/20152 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9503 event pairs, 252 based on Foata normal form. 4/1650 useless extension candidates. Maximal degree in co-relation 8097. Up to 1330 conditions per place. [2024-06-27 23:00:58,819 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 55 changer transitions 0/133 dead transitions. [2024-06-27 23:00:58,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1497 flow [2024-06-27 23:00:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 23:00:58,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-27 23:00:58,822 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 1138 flow. Second operand 6 states and 158 transitions. [2024-06-27 23:00:58,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1497 flow [2024-06-27 23:00:58,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 133 transitions, 1409 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:58,875 INFO L231 Difference]: Finished difference. Result has 114 places, 116 transitions, 1209 flow [2024-06-27 23:00:58,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=114, PETRI_TRANSITIONS=116} [2024-06-27 23:00:58,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 23:00:58,876 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 116 transitions, 1209 flow [2024-06-27 23:00:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:58,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:00:58,877 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:58,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1775102750, now seen corresponding path program 6 times [2024-06-27 23:00:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:58,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553860505] [2024-06-27 23:00:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:58,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:58,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553860505] [2024-06-27 23:00:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553860505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:58,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:58,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:58,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716203025] [2024-06-27 23:00:58,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:58,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:58,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:58,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:59,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:59,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:59,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:59,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:59,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:59,202 INFO L124 PetriNetUnfolderBase]: 934/1660 cut-off events. [2024-06-27 23:00:59,202 INFO L125 PetriNetUnfolderBase]: For 19774/19888 co-relation queries the response was YES. [2024-06-27 23:00:59,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 1660 events. 934/1660 cut-off events. For 19774/19888 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9472 event pairs, 252 based on Foata normal form. 4/1643 useless extension candidates. Maximal degree in co-relation 8044. Up to 1325 conditions per place. [2024-06-27 23:00:59,213 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 59 changer transitions 0/138 dead transitions. [2024-06-27 23:00:59,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 138 transitions, 1515 flow [2024-06-27 23:00:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-27 23:00:59,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626016260162602 [2024-06-27 23:00:59,215 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 1209 flow. Second operand 6 states and 163 transitions. [2024-06-27 23:00:59,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 138 transitions, 1515 flow [2024-06-27 23:00:59,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 138 transitions, 1383 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:59,242 INFO L231 Difference]: Finished difference. Result has 116 places, 116 transitions, 1209 flow [2024-06-27 23:00:59,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=116, PETRI_TRANSITIONS=116} [2024-06-27 23:00:59,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 23:00:59,247 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 116 transitions, 1209 flow [2024-06-27 23:00:59,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:59,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:59,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:59,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:00:59,248 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)] === [2024-06-27 23:00:59,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1346606242, now seen corresponding path program 2 times [2024-06-27 23:00:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:59,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675838576] [2024-06-27 23:00:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:59,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:59,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675838576] [2024-06-27 23:00:59,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675838576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:59,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:59,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764715367] [2024-06-27 23:00:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:59,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:59,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:59,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:59,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:59,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:59,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:59,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:59,627 INFO L124 PetriNetUnfolderBase]: 974/1724 cut-off events. [2024-06-27 23:00:59,627 INFO L125 PetriNetUnfolderBase]: For 22147/22261 co-relation queries the response was YES. [2024-06-27 23:00:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8445 conditions, 1724 events. 974/1724 cut-off events. For 22147/22261 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9947 event pairs, 252 based on Foata normal form. 14/1715 useless extension candidates. Maximal degree in co-relation 8398. Up to 1396 conditions per place. [2024-06-27 23:00:59,640 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 100 selfloop transitions, 27 changer transitions 0/140 dead transitions. [2024-06-27 23:00:59,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 140 transitions, 1561 flow [2024-06-27 23:00:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-27 23:00:59,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6878048780487804 [2024-06-27 23:00:59,641 INFO L175 Difference]: Start difference. First operand has 116 places, 116 transitions, 1209 flow. Second operand 5 states and 141 transitions. [2024-06-27 23:00:59,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 140 transitions, 1561 flow [2024-06-27 23:00:59,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 140 transitions, 1423 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:59,670 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 1163 flow [2024-06-27 23:00:59,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1163, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2024-06-27 23:00:59,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 23:00:59,672 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 1163 flow [2024-06-27 23:00:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:59,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:59,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:00:59,673 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)] === [2024-06-27 23:00:59,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1331369122, now seen corresponding path program 3 times [2024-06-27 23:00:59,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:59,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813346966] [2024-06-27 23:00:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:59,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:59,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:59,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813346966] [2024-06-27 23:00:59,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813346966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:59,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:59,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349084304] [2024-06-27 23:00:59,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:59,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:59,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:00:59,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 1163 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:59,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:59,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:00:59,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:00,084 INFO L124 PetriNetUnfolderBase]: 1021/1839 cut-off events. [2024-06-27 23:01:00,084 INFO L125 PetriNetUnfolderBase]: For 21195/21309 co-relation queries the response was YES. [2024-06-27 23:01:00,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8798 conditions, 1839 events. 1021/1839 cut-off events. For 21195/21309 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10813 event pairs, 194 based on Foata normal form. 14/1832 useless extension candidates. Maximal degree in co-relation 8752. Up to 1320 conditions per place. [2024-06-27 23:01:00,098 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 106 selfloop transitions, 33 changer transitions 0/152 dead transitions. [2024-06-27 23:01:00,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1601 flow [2024-06-27 23:01:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-27 23:01:00,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6910569105691057 [2024-06-27 23:01:00,100 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 1163 flow. Second operand 6 states and 170 transitions. [2024-06-27 23:01:00,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1601 flow [2024-06-27 23:01:00,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 1541 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:00,134 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 1243 flow [2024-06-27 23:01:00,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1243, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-06-27 23:01:00,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 23:01:00,134 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 1243 flow [2024-06-27 23:01:00,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:00,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:00,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:00,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:01:00,135 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)] === [2024-06-27 23:01:00,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 4 times [2024-06-27 23:01:00,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:00,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570770272] [2024-06-27 23:01:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:00,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:00,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570770272] [2024-06-27 23:01:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570770272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:00,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:00,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:00,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878994866] [2024-06-27 23:01:00,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:00,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:00,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:00,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 1243 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:00,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:00,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:00,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:00,510 INFO L124 PetriNetUnfolderBase]: 1033/1841 cut-off events. [2024-06-27 23:01:00,511 INFO L125 PetriNetUnfolderBase]: For 19592/19706 co-relation queries the response was YES. [2024-06-27 23:01:00,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8884 conditions, 1841 events. 1033/1841 cut-off events. For 19592/19706 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10791 event pairs, 281 based on Foata normal form. 12/1832 useless extension candidates. Maximal degree in co-relation 8836. Up to 1495 conditions per place. [2024-06-27 23:01:00,523 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 99 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-27 23:01:00,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 143 transitions, 1589 flow [2024-06-27 23:01:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 23:01:00,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 23:01:00,525 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 1243 flow. Second operand 6 states and 157 transitions. [2024-06-27 23:01:00,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 143 transitions, 1589 flow [2024-06-27 23:01:00,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 143 transitions, 1548 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:00,556 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 1290 flow [2024-06-27 23:01:00,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1290, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2024-06-27 23:01:00,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 23:01:00,557 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 1290 flow [2024-06-27 23:01:00,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:00,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:00,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:00,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:01:00,558 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)] === [2024-06-27 23:01:00,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash -567888250, now seen corresponding path program 1 times [2024-06-27 23:01:00,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:00,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779756620] [2024-06-27 23:01:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:00,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:00,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:00,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779756620] [2024-06-27 23:01:00,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779756620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:00,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010712371] [2024-06-27 23:01:00,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:00,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:00,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:00,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 1290 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:00,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:00,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:00,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:01,041 INFO L124 PetriNetUnfolderBase]: 1096/1936 cut-off events. [2024-06-27 23:01:01,041 INFO L125 PetriNetUnfolderBase]: For 20646/20728 co-relation queries the response was YES. [2024-06-27 23:01:01,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9475 conditions, 1936 events. 1096/1936 cut-off events. For 20646/20728 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11339 event pairs, 216 based on Foata normal form. 12/1926 useless extension candidates. Maximal degree in co-relation 9425. Up to 1236 conditions per place. [2024-06-27 23:01:01,052 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 37 changer transitions 0/160 dead transitions. [2024-06-27 23:01:01,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 160 transitions, 1768 flow [2024-06-27 23:01:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 23:01:01,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662020905923345 [2024-06-27 23:01:01,054 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 1290 flow. Second operand 7 states and 190 transitions. [2024-06-27 23:01:01,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 160 transitions, 1768 flow [2024-06-27 23:01:01,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1702 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:01,088 INFO L231 Difference]: Finished difference. Result has 125 places, 125 transitions, 1328 flow [2024-06-27 23:01:01,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1328, PETRI_PLACES=125, PETRI_TRANSITIONS=125} [2024-06-27 23:01:01,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 23:01:01,088 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 125 transitions, 1328 flow [2024-06-27 23:01:01,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:01,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:01,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:01:01,089 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)] === [2024-06-27 23:01:01,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1702333118, now seen corresponding path program 2 times [2024-06-27 23:01:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196583998] [2024-06-27 23:01:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:01,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:01,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:01,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196583998] [2024-06-27 23:01:01,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196583998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:01,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:01,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115056024] [2024-06-27 23:01:01,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:01,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:01,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:01,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 125 transitions, 1328 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:01,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:01,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:01,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:01,470 INFO L124 PetriNetUnfolderBase]: 1128/1994 cut-off events. [2024-06-27 23:01:01,471 INFO L125 PetriNetUnfolderBase]: For 21703/21785 co-relation queries the response was YES. [2024-06-27 23:01:01,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9798 conditions, 1994 events. 1128/1994 cut-off events. For 21703/21785 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11741 event pairs, 298 based on Foata normal form. 12/1986 useless extension candidates. Maximal degree in co-relation 9747. Up to 1661 conditions per place. [2024-06-27 23:01:01,483 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 104 selfloop transitions, 36 changer transitions 0/153 dead transitions. [2024-06-27 23:01:01,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 153 transitions, 1708 flow [2024-06-27 23:01:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 23:01:01,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 23:01:01,485 INFO L175 Difference]: Start difference. First operand has 125 places, 125 transitions, 1328 flow. Second operand 7 states and 183 transitions. [2024-06-27 23:01:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 153 transitions, 1708 flow [2024-06-27 23:01:01,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1660 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:01,521 INFO L231 Difference]: Finished difference. Result has 129 places, 126 transitions, 1371 flow [2024-06-27 23:01:01,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1371, PETRI_PLACES=129, PETRI_TRANSITIONS=126} [2024-06-27 23:01:01,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-27 23:01:01,522 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 1371 flow [2024-06-27 23:01:01,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:01,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:01,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:01:01,522 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)] === [2024-06-27 23:01:01,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -225292990, now seen corresponding path program 3 times [2024-06-27 23:01:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975658986] [2024-06-27 23:01:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:01,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975658986] [2024-06-27 23:01:01,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975658986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:01,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:01,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:01,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346172107] [2024-06-27 23:01:01,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:01,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:01,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:01,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:01,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:01,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:01,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 126 transitions, 1371 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:01,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:01,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:01,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:01,889 INFO L124 PetriNetUnfolderBase]: 1160/2046 cut-off events. [2024-06-27 23:01:01,889 INFO L125 PetriNetUnfolderBase]: For 23185/23267 co-relation queries the response was YES. [2024-06-27 23:01:01,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10181 conditions, 2046 events. 1160/2046 cut-off events. For 23185/23267 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12064 event pairs, 302 based on Foata normal form. 12/2038 useless extension candidates. Maximal degree in co-relation 10128. Up to 1713 conditions per place. [2024-06-27 23:01:01,903 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 100 selfloop transitions, 35 changer transitions 0/148 dead transitions. [2024-06-27 23:01:01,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 148 transitions, 1725 flow [2024-06-27 23:01:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 23:01:01,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 23:01:01,904 INFO L175 Difference]: Start difference. First operand has 129 places, 126 transitions, 1371 flow. Second operand 7 states and 178 transitions. [2024-06-27 23:01:01,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 148 transitions, 1725 flow [2024-06-27 23:01:01,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 148 transitions, 1654 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:01,942 INFO L231 Difference]: Finished difference. Result has 131 places, 127 transitions, 1389 flow [2024-06-27 23:01:01,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=131, PETRI_TRANSITIONS=127} [2024-06-27 23:01:01,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-27 23:01:01,943 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 127 transitions, 1389 flow [2024-06-27 23:01:01,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:01,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:01,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:01,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:01:01,943 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)] === [2024-06-27 23:01:01,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash 806379958, now seen corresponding path program 4 times [2024-06-27 23:01:01,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:01,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307044378] [2024-06-27 23:01:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:02,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307044378] [2024-06-27 23:01:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307044378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:02,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:02,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896180974] [2024-06-27 23:01:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:02,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:02,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 127 transitions, 1389 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:02,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:02,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:02,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:02,339 INFO L124 PetriNetUnfolderBase]: 1139/2009 cut-off events. [2024-06-27 23:01:02,339 INFO L125 PetriNetUnfolderBase]: For 22654/22736 co-relation queries the response was YES. [2024-06-27 23:01:02,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9908 conditions, 2009 events. 1139/2009 cut-off events. For 22654/22736 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11854 event pairs, 233 based on Foata normal form. 12/1997 useless extension candidates. Maximal degree in co-relation 9854. Up to 1266 conditions per place. [2024-06-27 23:01:02,353 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 107 selfloop transitions, 36 changer transitions 0/156 dead transitions. [2024-06-27 23:01:02,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 156 transitions, 1769 flow [2024-06-27 23:01:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 23:01:02,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6747967479674797 [2024-06-27 23:01:02,354 INFO L175 Difference]: Start difference. First operand has 131 places, 127 transitions, 1389 flow. Second operand 6 states and 166 transitions. [2024-06-27 23:01:02,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 156 transitions, 1769 flow [2024-06-27 23:01:02,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 156 transitions, 1696 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:02,392 INFO L231 Difference]: Finished difference. Result has 132 places, 127 transitions, 1405 flow [2024-06-27 23:01:02,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1405, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2024-06-27 23:01:02,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 23:01:02,393 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 1405 flow [2024-06-27 23:01:02,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:02,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:02,393 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] [2024-06-27 23:01:02,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:01:02,394 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)] === [2024-06-27 23:01:02,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1498415145, now seen corresponding path program 1 times [2024-06-27 23:01:02,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:02,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181853400] [2024-06-27 23:01:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:02,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181853400] [2024-06-27 23:01:02,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181853400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:02,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:02,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3081396] [2024-06-27 23:01:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:02,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:02,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:02,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 1405 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:02,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:02,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:02,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:02,859 INFO L124 PetriNetUnfolderBase]: 1338/2390 cut-off events. [2024-06-27 23:01:02,859 INFO L125 PetriNetUnfolderBase]: For 35882/35964 co-relation queries the response was YES. [2024-06-27 23:01:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11843 conditions, 2390 events. 1338/2390 cut-off events. For 35882/35964 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14633 event pairs, 370 based on Foata normal form. 32/2406 useless extension candidates. Maximal degree in co-relation 11788. Up to 1016 conditions per place. [2024-06-27 23:01:02,876 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 51 changer transitions 27/171 dead transitions. [2024-06-27 23:01:02,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 171 transitions, 1943 flow [2024-06-27 23:01:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 23:01:02,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6676829268292683 [2024-06-27 23:01:02,877 INFO L175 Difference]: Start difference. First operand has 132 places, 127 transitions, 1405 flow. Second operand 8 states and 219 transitions. [2024-06-27 23:01:02,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 171 transitions, 1943 flow [2024-06-27 23:01:02,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 171 transitions, 1843 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:02,921 INFO L231 Difference]: Finished difference. Result has 133 places, 118 transitions, 1273 flow [2024-06-27 23:01:02,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1273, PETRI_PLACES=133, PETRI_TRANSITIONS=118} [2024-06-27 23:01:02,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 23:01:02,922 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 118 transitions, 1273 flow [2024-06-27 23:01:02,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:02,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:02,922 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] [2024-06-27 23:01:02,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:01:02,923 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)] === [2024-06-27 23:01:02,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1314267421, now seen corresponding path program 2 times [2024-06-27 23:01:02,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743191094] [2024-06-27 23:01:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:03,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:03,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743191094] [2024-06-27 23:01:03,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743191094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:03,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:03,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929320590] [2024-06-27 23:01:03,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:03,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:03,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:03,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 118 transitions, 1273 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:03,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:03,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:03,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:03,387 INFO L124 PetriNetUnfolderBase]: 1114/2020 cut-off events. [2024-06-27 23:01:03,387 INFO L125 PetriNetUnfolderBase]: For 25937/25939 co-relation queries the response was YES. [2024-06-27 23:01:03,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9804 conditions, 2020 events. 1114/2020 cut-off events. For 25937/25939 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12048 event pairs, 394 based on Foata normal form. 36/2047 useless extension candidates. Maximal degree in co-relation 9750. Up to 1491 conditions per place. [2024-06-27 23:01:03,400 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 75 selfloop transitions, 54 changer transitions 3/145 dead transitions. [2024-06-27 23:01:03,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 145 transitions, 1629 flow [2024-06-27 23:01:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 23:01:03,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:01:03,402 INFO L175 Difference]: Start difference. First operand has 133 places, 118 transitions, 1273 flow. Second operand 8 states and 205 transitions. [2024-06-27 23:01:03,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 145 transitions, 1629 flow [2024-06-27 23:01:03,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 145 transitions, 1527 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:03,438 INFO L231 Difference]: Finished difference. Result has 128 places, 117 transitions, 1278 flow [2024-06-27 23:01:03,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1278, PETRI_PLACES=128, PETRI_TRANSITIONS=117} [2024-06-27 23:01:03,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-27 23:01:03,438 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 117 transitions, 1278 flow [2024-06-27 23:01:03,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:03,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:03,439 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] [2024-06-27 23:01:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:01:03,439 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)] === [2024-06-27 23:01:03,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1232717865, now seen corresponding path program 3 times [2024-06-27 23:01:03,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:03,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303555997] [2024-06-27 23:01:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:03,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:03,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303555997] [2024-06-27 23:01:03,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303555997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:03,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:03,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659409814] [2024-06-27 23:01:03,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:03,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:03,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:03,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 117 transitions, 1278 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:03,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:03,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:03,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:03,870 INFO L124 PetriNetUnfolderBase]: 1180/2146 cut-off events. [2024-06-27 23:01:03,870 INFO L125 PetriNetUnfolderBase]: For 23552/23554 co-relation queries the response was YES. [2024-06-27 23:01:03,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10046 conditions, 2146 events. 1180/2146 cut-off events. For 23552/23554 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13031 event pairs, 380 based on Foata normal form. 32/2169 useless extension candidates. Maximal degree in co-relation 9994. Up to 1433 conditions per place. [2024-06-27 23:01:03,884 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 43 changer transitions 34/150 dead transitions. [2024-06-27 23:01:03,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 150 transitions, 1680 flow [2024-06-27 23:01:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 23:01:03,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-27 23:01:03,885 INFO L175 Difference]: Start difference. First operand has 128 places, 117 transitions, 1278 flow. Second operand 8 states and 210 transitions. [2024-06-27 23:01:03,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 150 transitions, 1680 flow [2024-06-27 23:01:03,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 150 transitions, 1570 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:03,916 INFO L231 Difference]: Finished difference. Result has 130 places, 104 transitions, 1096 flow [2024-06-27 23:01:03,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1096, PETRI_PLACES=130, PETRI_TRANSITIONS=104} [2024-06-27 23:01:03,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 23:01:03,917 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 104 transitions, 1096 flow [2024-06-27 23:01:03,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:03,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:03,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:03,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:01:03,917 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)] === [2024-06-27 23:01:03,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1977077523, now seen corresponding path program 4 times [2024-06-27 23:01:03,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:03,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472003633] [2024-06-27 23:01:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:03,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472003633] [2024-06-27 23:01:04,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472003633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:04,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:04,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:04,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390660964] [2024-06-27 23:01:04,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:04,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:04,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:04,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:04,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:04,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 104 transitions, 1096 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:04,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:04,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:04,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:04,331 INFO L124 PetriNetUnfolderBase]: 1042/1864 cut-off events. [2024-06-27 23:01:04,331 INFO L125 PetriNetUnfolderBase]: For 24446/24447 co-relation queries the response was YES. [2024-06-27 23:01:04,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8968 conditions, 1864 events. 1042/1864 cut-off events. For 24446/24447 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10896 event pairs, 376 based on Foata normal form. 35/1885 useless extension candidates. Maximal degree in co-relation 8915. Up to 1423 conditions per place. [2024-06-27 23:01:04,345 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 43 changer transitions 3/125 dead transitions. [2024-06-27 23:01:04,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 125 transitions, 1396 flow [2024-06-27 23:01:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 23:01:04,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 23:01:04,346 INFO L175 Difference]: Start difference. First operand has 130 places, 104 transitions, 1096 flow. Second operand 8 states and 200 transitions. [2024-06-27 23:01:04,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 125 transitions, 1396 flow [2024-06-27 23:01:04,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 125 transitions, 1252 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-27 23:01:04,374 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 1035 flow [2024-06-27 23:01:04,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2024-06-27 23:01:04,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 23:01:04,375 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 1035 flow [2024-06-27 23:01:04,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:04,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:04,375 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] [2024-06-27 23:01:04,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:01:04,376 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)] === [2024-06-27 23:01:04,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1990421907, now seen corresponding path program 1 times [2024-06-27 23:01:04,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:04,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510604159] [2024-06-27 23:01:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:04,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:04,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510604159] [2024-06-27 23:01:04,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510604159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:04,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:04,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:04,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543074947] [2024-06-27 23:01:04,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:04,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:04,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:04,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:04,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 1035 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:04,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:04,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:04,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:04,857 INFO L124 PetriNetUnfolderBase]: 1257/2269 cut-off events. [2024-06-27 23:01:04,858 INFO L125 PetriNetUnfolderBase]: For 27045/27046 co-relation queries the response was YES. [2024-06-27 23:01:04,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10654 conditions, 2269 events. 1257/2269 cut-off events. For 27045/27046 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14063 event pairs, 479 based on Foata normal form. 31/2286 useless extension candidates. Maximal degree in co-relation 10605. Up to 1355 conditions per place. [2024-06-27 23:01:04,874 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 73 selfloop transitions, 42 changer transitions 4/131 dead transitions. [2024-06-27 23:01:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 131 transitions, 1421 flow [2024-06-27 23:01:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 23:01:04,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:01:04,876 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 1035 flow. Second operand 8 states and 205 transitions. [2024-06-27 23:01:04,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 131 transitions, 1421 flow [2024-06-27 23:01:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 131 transitions, 1337 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:04,913 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 1027 flow [2024-06-27 23:01:04,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-06-27 23:01:04,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-27 23:01:04,914 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 1027 flow [2024-06-27 23:01:04,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:04,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:04,915 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] [2024-06-27 23:01:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:01:04,915 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)] === [2024-06-27 23:01:04,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1606191477, now seen corresponding path program 2 times [2024-06-27 23:01:04,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:04,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805154459] [2024-06-27 23:01:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:05,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:05,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805154459] [2024-06-27 23:01:05,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805154459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:05,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:05,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:05,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840256373] [2024-06-27 23:01:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:05,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:05,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:05,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 1027 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:05,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:05,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:05,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:05,353 INFO L124 PetriNetUnfolderBase]: 1166/2116 cut-off events. [2024-06-27 23:01:05,353 INFO L125 PetriNetUnfolderBase]: For 24712/24721 co-relation queries the response was YES. [2024-06-27 23:01:05,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9671 conditions, 2116 events. 1166/2116 cut-off events. For 24712/24721 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12970 event pairs, 478 based on Foata normal form. 43/2145 useless extension candidates. Maximal degree in co-relation 9621. Up to 1655 conditions per place. [2024-06-27 23:01:05,366 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 41 changer transitions 3/123 dead transitions. [2024-06-27 23:01:05,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 123 transitions, 1323 flow [2024-06-27 23:01:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 23:01:05,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 23:01:05,368 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 1027 flow. Second operand 8 states and 200 transitions. [2024-06-27 23:01:05,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 123 transitions, 1323 flow [2024-06-27 23:01:05,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 1240 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:05,404 INFO L231 Difference]: Finished difference. Result has 122 places, 101 transitions, 1023 flow [2024-06-27 23:01:05,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1023, PETRI_PLACES=122, PETRI_TRANSITIONS=101} [2024-06-27 23:01:05,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 23:01:05,405 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 101 transitions, 1023 flow [2024-06-27 23:01:05,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:05,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:05,406 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] [2024-06-27 23:01:05,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:01:05,406 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)] === [2024-06-27 23:01:05,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1605853143, now seen corresponding path program 5 times [2024-06-27 23:01:05,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:05,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999270923] [2024-06-27 23:01:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:05,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:05,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999270923] [2024-06-27 23:01:05,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999270923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:05,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:05,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761262446] [2024-06-27 23:01:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:05,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:05,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:05,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:05,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:05,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 101 transitions, 1023 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:05,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:05,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:05,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:05,900 INFO L124 PetriNetUnfolderBase]: 1232/2246 cut-off events. [2024-06-27 23:01:05,901 INFO L125 PetriNetUnfolderBase]: For 26553/26562 co-relation queries the response was YES. [2024-06-27 23:01:05,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10152 conditions, 2246 events. 1232/2246 cut-off events. For 26553/26562 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13937 event pairs, 464 based on Foata normal form. 31/2263 useless extension candidates. Maximal degree in co-relation 10101. Up to 1445 conditions per place. [2024-06-27 23:01:05,916 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 40 changer transitions 6/128 dead transitions. [2024-06-27 23:01:05,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 128 transitions, 1367 flow [2024-06-27 23:01:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 23:01:05,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 23:01:05,917 INFO L175 Difference]: Start difference. First operand has 122 places, 101 transitions, 1023 flow. Second operand 8 states and 204 transitions. [2024-06-27 23:01:05,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 128 transitions, 1367 flow [2024-06-27 23:01:05,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 128 transitions, 1287 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:05,954 INFO L231 Difference]: Finished difference. Result has 124 places, 100 transitions, 1013 flow [2024-06-27 23:01:05,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1013, PETRI_PLACES=124, PETRI_TRANSITIONS=100} [2024-06-27 23:01:05,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-27 23:01:05,954 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 100 transitions, 1013 flow [2024-06-27 23:01:05,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:05,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:05,955 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] [2024-06-27 23:01:05,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:01:05,955 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)] === [2024-06-27 23:01:05,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1303415619, now seen corresponding path program 3 times [2024-06-27 23:01:05,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:05,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039014990] [2024-06-27 23:01:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:05,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:06,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039014990] [2024-06-27 23:01:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039014990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:06,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:06,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145345248] [2024-06-27 23:01:06,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:06,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:06,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:06,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:06,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 100 transitions, 1013 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:06,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:06,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:06,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:06,427 INFO L124 PetriNetUnfolderBase]: 1447/2617 cut-off events. [2024-06-27 23:01:06,427 INFO L125 PetriNetUnfolderBase]: For 37280/37281 co-relation queries the response was YES. [2024-06-27 23:01:06,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12179 conditions, 2617 events. 1447/2617 cut-off events. For 37280/37281 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16920 event pairs, 489 based on Foata normal form. 37/2632 useless extension candidates. Maximal degree in co-relation 12127. Up to 1593 conditions per place. [2024-06-27 23:01:06,444 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 87 selfloop transitions, 31 changer transitions 3/133 dead transitions. [2024-06-27 23:01:06,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 133 transitions, 1433 flow [2024-06-27 23:01:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 23:01:06,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6951219512195121 [2024-06-27 23:01:06,445 INFO L175 Difference]: Start difference. First operand has 124 places, 100 transitions, 1013 flow. Second operand 6 states and 171 transitions. [2024-06-27 23:01:06,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 133 transitions, 1433 flow [2024-06-27 23:01:06,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 133 transitions, 1354 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:06,487 INFO L231 Difference]: Finished difference. Result has 124 places, 100 transitions, 1000 flow [2024-06-27 23:01:06,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1000, PETRI_PLACES=124, PETRI_TRANSITIONS=100} [2024-06-27 23:01:06,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-27 23:01:06,488 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 100 transitions, 1000 flow [2024-06-27 23:01:06,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:06,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:06,489 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] [2024-06-27 23:01:06,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:01:06,489 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)] === [2024-06-27 23:01:06,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:06,490 INFO L85 PathProgramCache]: Analyzing trace with hash -106003899, now seen corresponding path program 4 times [2024-06-27 23:01:06,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:06,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767341153] [2024-06-27 23:01:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:06,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:06,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767341153] [2024-06-27 23:01:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767341153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:06,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461102122] [2024-06-27 23:01:06,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:06,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:06,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:06,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 100 transitions, 1000 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:06,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:06,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:06,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:06,926 INFO L124 PetriNetUnfolderBase]: 1505/2719 cut-off events. [2024-06-27 23:01:06,927 INFO L125 PetriNetUnfolderBase]: For 40813/40814 co-relation queries the response was YES. [2024-06-27 23:01:06,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 2719 events. 1505/2719 cut-off events. For 40813/40814 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17681 event pairs, 689 based on Foata normal form. 35/2736 useless extension candidates. Maximal degree in co-relation 12651. Up to 2108 conditions per place. [2024-06-27 23:01:06,944 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 38 changer transitions 3/120 dead transitions. [2024-06-27 23:01:06,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 1288 flow [2024-06-27 23:01:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 23:01:06,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 23:01:06,945 INFO L175 Difference]: Start difference. First operand has 124 places, 100 transitions, 1000 flow. Second operand 7 states and 178 transitions. [2024-06-27 23:01:06,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 1288 flow [2024-06-27 23:01:06,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 120 transitions, 1216 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:06,988 INFO L231 Difference]: Finished difference. Result has 125 places, 99 transitions, 1003 flow [2024-06-27 23:01:06,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1003, PETRI_PLACES=125, PETRI_TRANSITIONS=99} [2024-06-27 23:01:06,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 23:01:06,989 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 99 transitions, 1003 flow [2024-06-27 23:01:06,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:06,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:06,989 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] [2024-06-27 23:01:06,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:01:06,990 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)] === [2024-06-27 23:01:06,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:06,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1316748099, now seen corresponding path program 5 times [2024-06-27 23:01:06,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:06,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443750461] [2024-06-27 23:01:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:06,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:07,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:07,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443750461] [2024-06-27 23:01:07,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443750461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:07,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:07,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:07,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685282750] [2024-06-27 23:01:07,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:07,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:07,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:07,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:07,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 99 transitions, 1003 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:07,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:07,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:07,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:07,484 INFO L124 PetriNetUnfolderBase]: 1434/2614 cut-off events. [2024-06-27 23:01:07,485 INFO L125 PetriNetUnfolderBase]: For 30660/30669 co-relation queries the response was YES. [2024-06-27 23:01:07,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2614 events. 1434/2614 cut-off events. For 30660/30669 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17015 event pairs, 608 based on Foata normal form. 43/2643 useless extension candidates. Maximal degree in co-relation 11441. Up to 2121 conditions per place. [2024-06-27 23:01:07,499 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 77 selfloop transitions, 28 changer transitions 1/118 dead transitions. [2024-06-27 23:01:07,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 118 transitions, 1285 flow [2024-06-27 23:01:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 23:01:07,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 23:01:07,501 INFO L175 Difference]: Start difference. First operand has 125 places, 99 transitions, 1003 flow. Second operand 6 states and 157 transitions. [2024-06-27 23:01:07,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 118 transitions, 1285 flow [2024-06-27 23:01:07,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 118 transitions, 1209 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:07,539 INFO L231 Difference]: Finished difference. Result has 125 places, 98 transitions, 983 flow [2024-06-27 23:01:07,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=125, PETRI_TRANSITIONS=98} [2024-06-27 23:01:07,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 23:01:07,540 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 98 transitions, 983 flow [2024-06-27 23:01:07,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:07,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:07,540 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] [2024-06-27 23:01:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:01:07,541 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)] === [2024-06-27 23:01:07,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -92671419, now seen corresponding path program 6 times [2024-06-27 23:01:07,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:07,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587942227] [2024-06-27 23:01:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:07,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587942227] [2024-06-27 23:01:07,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587942227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:07,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:07,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906986519] [2024-06-27 23:01:07,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:07,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:07,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:07,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:07,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:07,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 98 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:07,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:07,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:07,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:08,044 INFO L124 PetriNetUnfolderBase]: 1629/2999 cut-off events. [2024-06-27 23:01:08,045 INFO L125 PetriNetUnfolderBase]: For 36572/36581 co-relation queries the response was YES. [2024-06-27 23:01:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13283 conditions, 2999 events. 1629/2999 cut-off events. For 36572/36581 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20290 event pairs, 693 based on Foata normal form. 39/3020 useless extension candidates. Maximal degree in co-relation 13231. Up to 1599 conditions per place. [2024-06-27 23:01:08,064 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 73 selfloop transitions, 36 changer transitions 4/125 dead transitions. [2024-06-27 23:01:08,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 125 transitions, 1361 flow [2024-06-27 23:01:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 23:01:08,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 23:01:08,065 INFO L175 Difference]: Start difference. First operand has 125 places, 98 transitions, 983 flow. Second operand 7 states and 183 transitions. [2024-06-27 23:01:08,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 125 transitions, 1361 flow [2024-06-27 23:01:08,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 1296 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:08,116 INFO L231 Difference]: Finished difference. Result has 126 places, 97 transitions, 986 flow [2024-06-27 23:01:08,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=986, PETRI_PLACES=126, PETRI_TRANSITIONS=97} [2024-06-27 23:01:08,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-27 23:01:08,117 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 97 transitions, 986 flow [2024-06-27 23:01:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:08,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:08,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:08,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:01:08,117 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)] === [2024-06-27 23:01:08,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash -873531489, now seen corresponding path program 7 times [2024-06-27 23:01:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142394987] [2024-06-27 23:01:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142394987] [2024-06-27 23:01:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142394987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:08,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:08,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:08,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106030769] [2024-06-27 23:01:08,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:08,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:08,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 97 transitions, 986 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:08,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:08,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:08,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:08,631 INFO L124 PetriNetUnfolderBase]: 1614/3012 cut-off events. [2024-06-27 23:01:08,631 INFO L125 PetriNetUnfolderBase]: For 34346/34355 co-relation queries the response was YES. [2024-06-27 23:01:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12801 conditions, 3012 events. 1614/3012 cut-off events. For 34346/34355 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20669 event pairs, 503 based on Foata normal form. 45/3048 useless extension candidates. Maximal degree in co-relation 12749. Up to 1663 conditions per place. [2024-06-27 23:01:08,651 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 83 selfloop transitions, 33 changer transitions 5/133 dead transitions. [2024-06-27 23:01:08,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 1382 flow [2024-06-27 23:01:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 23:01:08,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759581881533101 [2024-06-27 23:01:08,652 INFO L175 Difference]: Start difference. First operand has 126 places, 97 transitions, 986 flow. Second operand 7 states and 194 transitions. [2024-06-27 23:01:08,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 1382 flow [2024-06-27 23:01:08,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 133 transitions, 1309 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:08,689 INFO L231 Difference]: Finished difference. Result has 127 places, 96 transitions, 972 flow [2024-06-27 23:01:08,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=127, PETRI_TRANSITIONS=96} [2024-06-27 23:01:08,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 23:01:08,690 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 96 transitions, 972 flow [2024-06-27 23:01:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:08,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:08,691 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] [2024-06-27 23:01:08,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:01:08,693 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)] === [2024-06-27 23:01:08,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -476901849, now seen corresponding path program 8 times [2024-06-27 23:01:08,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509010556] [2024-06-27 23:01:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:08,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:08,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509010556] [2024-06-27 23:01:08,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509010556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:08,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:08,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:08,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753557562] [2024-06-27 23:01:08,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:08,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:08,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:08,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:08,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:08,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:08,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 96 transitions, 972 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:08,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:08,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:08,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:09,152 INFO L124 PetriNetUnfolderBase]: 1515/2817 cut-off events. [2024-06-27 23:01:09,152 INFO L125 PetriNetUnfolderBase]: For 27332/27333 co-relation queries the response was YES. [2024-06-27 23:01:09,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11629 conditions, 2817 events. 1515/2817 cut-off events. For 27332/27333 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18994 event pairs, 753 based on Foata normal form. 35/2838 useless extension candidates. Maximal degree in co-relation 11577. Up to 2174 conditions per place. [2024-06-27 23:01:09,168 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 35 changer transitions 3/116 dead transitions. [2024-06-27 23:01:09,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 116 transitions, 1252 flow [2024-06-27 23:01:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 23:01:09,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 23:01:09,170 INFO L175 Difference]: Start difference. First operand has 127 places, 96 transitions, 972 flow. Second operand 7 states and 177 transitions. [2024-06-27 23:01:09,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 116 transitions, 1252 flow [2024-06-27 23:01:09,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 116 transitions, 1149 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:09,200 INFO L231 Difference]: Finished difference. Result has 126 places, 95 transitions, 938 flow [2024-06-27 23:01:09,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=938, PETRI_PLACES=126, PETRI_TRANSITIONS=95} [2024-06-27 23:01:09,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-27 23:01:09,201 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 95 transitions, 938 flow [2024-06-27 23:01:09,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:09,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:09,201 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] [2024-06-27 23:01:09,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:01:09,201 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)] === [2024-06-27 23:01:09,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:09,202 INFO L85 PathProgramCache]: Analyzing trace with hash -477240183, now seen corresponding path program 6 times [2024-06-27 23:01:09,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:09,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502312316] [2024-06-27 23:01:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:09,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:09,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:09,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502312316] [2024-06-27 23:01:09,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502312316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:09,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:09,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:09,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152678100] [2024-06-27 23:01:09,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:09,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:09,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:09,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:09,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:09,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 23:01:09,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 95 transitions, 938 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:09,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:09,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 23:01:09,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:09,633 INFO L124 PetriNetUnfolderBase]: 1452/2720 cut-off events. [2024-06-27 23:01:09,633 INFO L125 PetriNetUnfolderBase]: For 20356/20357 co-relation queries the response was YES. [2024-06-27 23:01:09,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10424 conditions, 2720 events. 1452/2720 cut-off events. For 20356/20357 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18333 event pairs, 604 based on Foata normal form. 31/2733 useless extension candidates. Maximal degree in co-relation 10374. Up to 1293 conditions per place. [2024-06-27 23:01:09,648 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 34 changer transitions 7/121 dead transitions. [2024-06-27 23:01:09,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 121 transitions, 1266 flow [2024-06-27 23:01:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 23:01:09,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 23:01:09,650 INFO L175 Difference]: Start difference. First operand has 126 places, 95 transitions, 938 flow. Second operand 7 states and 181 transitions. [2024-06-27 23:01:09,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 121 transitions, 1266 flow [2024-06-27 23:01:09,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 121 transitions, 1196 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:09,676 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 912 flow [2024-06-27 23:01:09,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2024-06-27 23:01:09,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 23:01:09,677 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 912 flow [2024-06-27 23:01:09,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:09,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:09,677 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, 1] [2024-06-27 23:01:09,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:01:09,677 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)] === [2024-06-27 23:01:09,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:09,678 INFO L85 PathProgramCache]: Analyzing trace with hash 754370432, now seen corresponding path program 1 times [2024-06-27 23:01:09,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:09,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831984293] [2024-06-27 23:01:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:09,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:09,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:09,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831984293] [2024-06-27 23:01:09,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831984293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:09,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220337972] [2024-06-27 23:01:09,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:09,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:09,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:09,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:09,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:09,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:10,162 INFO L124 PetriNetUnfolderBase]: 1506/2721 cut-off events. [2024-06-27 23:01:10,163 INFO L125 PetriNetUnfolderBase]: For 15203/15218 co-relation queries the response was YES. [2024-06-27 23:01:10,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10171 conditions, 2721 events. 1506/2721 cut-off events. For 15203/15218 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17853 event pairs, 378 based on Foata normal form. 6/2705 useless extension candidates. Maximal degree in co-relation 10121. Up to 2194 conditions per place. [2024-06-27 23:01:10,174 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 72 selfloop transitions, 21 changer transitions 45/146 dead transitions. [2024-06-27 23:01:10,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 146 transitions, 1594 flow [2024-06-27 23:01:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 23:01:10,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 23:01:10,175 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 912 flow. Second operand 8 states and 196 transitions. [2024-06-27 23:01:10,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 146 transitions, 1594 flow [2024-06-27 23:01:10,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 146 transitions, 1421 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:10,202 INFO L231 Difference]: Finished difference. Result has 131 places, 70 transitions, 649 flow [2024-06-27 23:01:10,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=649, PETRI_PLACES=131, PETRI_TRANSITIONS=70} [2024-06-27 23:01:10,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-27 23:01:10,203 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 70 transitions, 649 flow [2024-06-27 23:01:10,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:10,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:10,203 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, 1] [2024-06-27 23:01:10,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:01:10,204 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)] === [2024-06-27 23:01:10,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1424040106, now seen corresponding path program 2 times [2024-06-27 23:01:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:10,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950310014] [2024-06-27 23:01:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:10,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:10,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950310014] [2024-06-27 23:01:10,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950310014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:10,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:10,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:10,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115208283] [2024-06-27 23:01:10,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:10,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:10,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:10,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:10,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:10,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 70 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:10,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:10,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:10,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:10,529 INFO L124 PetriNetUnfolderBase]: 565/1039 cut-off events. [2024-06-27 23:01:10,530 INFO L125 PetriNetUnfolderBase]: For 10927/10930 co-relation queries the response was YES. [2024-06-27 23:01:10,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4563 conditions, 1039 events. 565/1039 cut-off events. For 10927/10930 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5115 event pairs, 212 based on Foata normal form. 6/1036 useless extension candidates. Maximal degree in co-relation 4523. Up to 788 conditions per place. [2024-06-27 23:01:10,536 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2024-06-27 23:01:10,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 97 transitions, 940 flow [2024-06-27 23:01:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 23:01:10,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-27 23:01:10,552 INFO L175 Difference]: Start difference. First operand has 131 places, 70 transitions, 649 flow. Second operand 8 states and 177 transitions. [2024-06-27 23:01:10,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 97 transitions, 940 flow [2024-06-27 23:01:10,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 816 flow, removed 28 selfloop flow, removed 18 redundant places. [2024-06-27 23:01:10,575 INFO L231 Difference]: Finished difference. Result has 100 places, 74 transitions, 629 flow [2024-06-27 23:01:10,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=629, PETRI_PLACES=100, PETRI_TRANSITIONS=74} [2024-06-27 23:01:10,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 23:01:10,575 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 74 transitions, 629 flow [2024-06-27 23:01:10,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:10,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:10,576 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, 1] [2024-06-27 23:01:10,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:01:10,577 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)] === [2024-06-27 23:01:10,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1562568256, now seen corresponding path program 3 times [2024-06-27 23:01:10,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:10,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930553246] [2024-06-27 23:01:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:10,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:10,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930553246] [2024-06-27 23:01:10,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930553246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:10,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:10,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:10,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937363691] [2024-06-27 23:01:10,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:10,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:10,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:10,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 74 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:10,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:10,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:10,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:10,921 INFO L124 PetriNetUnfolderBase]: 602/1097 cut-off events. [2024-06-27 23:01:10,921 INFO L125 PetriNetUnfolderBase]: For 5401/5401 co-relation queries the response was YES. [2024-06-27 23:01:10,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 1097 events. 602/1097 cut-off events. For 5401/5401 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5459 event pairs, 233 based on Foata normal form. 6/1089 useless extension candidates. Maximal degree in co-relation 4359. Up to 834 conditions per place. [2024-06-27 23:01:10,928 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 73 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2024-06-27 23:01:10,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 106 transitions, 1009 flow [2024-06-27 23:01:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 23:01:10,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 23:01:10,929 INFO L175 Difference]: Start difference. First operand has 100 places, 74 transitions, 629 flow. Second operand 9 states and 189 transitions. [2024-06-27 23:01:10,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 106 transitions, 1009 flow [2024-06-27 23:01:10,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 106 transitions, 953 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:10,937 INFO L231 Difference]: Finished difference. Result has 107 places, 84 transitions, 772 flow [2024-06-27 23:01:10,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=107, PETRI_TRANSITIONS=84} [2024-06-27 23:01:10,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 23:01:10,938 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 84 transitions, 772 flow [2024-06-27 23:01:10,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:10,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:10,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:10,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:01:10,938 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)] === [2024-06-27 23:01:10,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:10,939 INFO L85 PathProgramCache]: Analyzing trace with hash -925440770, now seen corresponding path program 4 times [2024-06-27 23:01:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:10,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132246720] [2024-06-27 23:01:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132246720] [2024-06-27 23:01:11,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132246720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:11,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:11,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962017351] [2024-06-27 23:01:11,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:11,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:11,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:11,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:11,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:11,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 84 transitions, 772 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:11,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:11,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:11,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:11,295 INFO L124 PetriNetUnfolderBase]: 630/1157 cut-off events. [2024-06-27 23:01:11,295 INFO L125 PetriNetUnfolderBase]: For 6324/6327 co-relation queries the response was YES. [2024-06-27 23:01:11,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1157 events. 630/1157 cut-off events. For 6324/6327 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5791 event pairs, 218 based on Foata normal form. 6/1154 useless extension candidates. Maximal degree in co-relation 4700. Up to 848 conditions per place. [2024-06-27 23:01:11,302 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 73 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-27 23:01:11,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 109 transitions, 1088 flow [2024-06-27 23:01:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 23:01:11,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-27 23:01:11,303 INFO L175 Difference]: Start difference. First operand has 107 places, 84 transitions, 772 flow. Second operand 8 states and 175 transitions. [2024-06-27 23:01:11,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 109 transitions, 1088 flow [2024-06-27 23:01:11,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 109 transitions, 1047 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:11,314 INFO L231 Difference]: Finished difference. Result has 115 places, 88 transitions, 871 flow [2024-06-27 23:01:11,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=871, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2024-06-27 23:01:11,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 23:01:11,314 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 871 flow [2024-06-27 23:01:11,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:11,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:11,315 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, 1] [2024-06-27 23:01:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:01:11,315 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)] === [2024-06-27 23:01:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 455304092, now seen corresponding path program 5 times [2024-06-27 23:01:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:11,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690118431] [2024-06-27 23:01:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690118431] [2024-06-27 23:01:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690118431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:11,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964616416] [2024-06-27 23:01:11,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:11,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:11,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:11,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 871 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:11,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:11,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:11,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:11,630 INFO L124 PetriNetUnfolderBase]: 691/1251 cut-off events. [2024-06-27 23:01:11,631 INFO L125 PetriNetUnfolderBase]: For 8217/8220 co-relation queries the response was YES. [2024-06-27 23:01:11,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5322 conditions, 1251 events. 691/1251 cut-off events. For 8217/8220 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6372 event pairs, 254 based on Foata normal form. 8/1243 useless extension candidates. Maximal degree in co-relation 5284. Up to 908 conditions per place. [2024-06-27 23:01:11,637 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 84 selfloop transitions, 28 changer transitions 0/120 dead transitions. [2024-06-27 23:01:11,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 120 transitions, 1271 flow [2024-06-27 23:01:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 23:01:11,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-27 23:01:11,639 INFO L175 Difference]: Start difference. First operand has 115 places, 88 transitions, 871 flow. Second operand 8 states and 181 transitions. [2024-06-27 23:01:11,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 120 transitions, 1271 flow [2024-06-27 23:01:11,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 1195 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:11,650 INFO L231 Difference]: Finished difference. Result has 121 places, 93 transitions, 949 flow [2024-06-27 23:01:11,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=121, PETRI_TRANSITIONS=93} [2024-06-27 23:01:11,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-27 23:01:11,651 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 93 transitions, 949 flow [2024-06-27 23:01:11,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:11,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:11,652 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, 1] [2024-06-27 23:01:11,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:01:11,652 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)] === [2024-06-27 23:01:11,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:11,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1618055564, now seen corresponding path program 6 times [2024-06-27 23:01:11,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:11,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549368061] [2024-06-27 23:01:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:11,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:11,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549368061] [2024-06-27 23:01:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549368061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:11,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:11,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359112537] [2024-06-27 23:01:11,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:11,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:11,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:11,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:11,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 93 transitions, 949 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:11,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:11,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:11,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:11,957 INFO L124 PetriNetUnfolderBase]: 719/1304 cut-off events. [2024-06-27 23:01:11,957 INFO L125 PetriNetUnfolderBase]: For 8307/8310 co-relation queries the response was YES. [2024-06-27 23:01:11,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5555 conditions, 1304 events. 719/1304 cut-off events. For 8307/8310 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6694 event pairs, 267 based on Foata normal form. 8/1301 useless extension candidates. Maximal degree in co-relation 5514. Up to 1017 conditions per place. [2024-06-27 23:01:11,965 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 82 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-27 23:01:11,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 115 transitions, 1255 flow [2024-06-27 23:01:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 23:01:11,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-27 23:01:11,966 INFO L175 Difference]: Start difference. First operand has 121 places, 93 transitions, 949 flow. Second operand 8 states and 172 transitions. [2024-06-27 23:01:11,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 115 transitions, 1255 flow [2024-06-27 23:01:11,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 115 transitions, 1218 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 23:01:11,979 INFO L231 Difference]: Finished difference. Result has 129 places, 96 transitions, 1017 flow [2024-06-27 23:01:11,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1017, PETRI_PLACES=129, PETRI_TRANSITIONS=96} [2024-06-27 23:01:11,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-27 23:01:11,980 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 96 transitions, 1017 flow [2024-06-27 23:01:11,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:11,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:11,980 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, 1] [2024-06-27 23:01:11,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:01:11,980 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)] === [2024-06-27 23:01:11,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:11,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1468811660, now seen corresponding path program 7 times [2024-06-27 23:01:11,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:11,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138895882] [2024-06-27 23:01:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:11,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:12,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138895882] [2024-06-27 23:01:12,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138895882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:12,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:12,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853331111] [2024-06-27 23:01:12,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:12,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:12,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:12,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:12,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:12,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:12,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 96 transitions, 1017 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:12,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:12,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:12,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:12,311 INFO L124 PetriNetUnfolderBase]: 747/1374 cut-off events. [2024-06-27 23:01:12,312 INFO L125 PetriNetUnfolderBase]: For 9044/9047 co-relation queries the response was YES. [2024-06-27 23:01:12,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5833 conditions, 1374 events. 747/1374 cut-off events. For 9044/9047 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7233 event pairs, 169 based on Foata normal form. 8/1376 useless extension candidates. Maximal degree in co-relation 5789. Up to 621 conditions per place. [2024-06-27 23:01:12,320 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 74 selfloop transitions, 47 changer transitions 0/129 dead transitions. [2024-06-27 23:01:12,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 129 transitions, 1427 flow [2024-06-27 23:01:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 23:01:12,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-27 23:01:12,322 INFO L175 Difference]: Start difference. First operand has 129 places, 96 transitions, 1017 flow. Second operand 8 states and 185 transitions. [2024-06-27 23:01:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 129 transitions, 1427 flow [2024-06-27 23:01:12,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 129 transitions, 1368 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:12,339 INFO L231 Difference]: Finished difference. Result has 134 places, 99 transitions, 1087 flow [2024-06-27 23:01:12,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=134, PETRI_TRANSITIONS=99} [2024-06-27 23:01:12,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 23:01:12,341 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 99 transitions, 1087 flow [2024-06-27 23:01:12,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:12,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:12,341 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, 1] [2024-06-27 23:01:12,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:01:12,341 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)] === [2024-06-27 23:01:12,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1084581230, now seen corresponding path program 8 times [2024-06-27 23:01:12,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:12,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018531472] [2024-06-27 23:01:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:12,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:12,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:12,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018531472] [2024-06-27 23:01:12,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018531472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:12,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:12,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983492716] [2024-06-27 23:01:12,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:12,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:12,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:12,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:12,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 99 transitions, 1087 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:12,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:12,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:12,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:12,719 INFO L124 PetriNetUnfolderBase]: 795/1458 cut-off events. [2024-06-27 23:01:12,719 INFO L125 PetriNetUnfolderBase]: For 10887/10890 co-relation queries the response was YES. [2024-06-27 23:01:12,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6404 conditions, 1458 events. 795/1458 cut-off events. For 10887/10890 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7818 event pairs, 213 based on Foata normal form. 8/1458 useless extension candidates. Maximal degree in co-relation 6358. Up to 1151 conditions per place. [2024-06-27 23:01:12,728 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 105 selfloop transitions, 19 changer transitions 0/132 dead transitions. [2024-06-27 23:01:12,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1465 flow [2024-06-27 23:01:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 23:01:12,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 23:01:12,729 INFO L175 Difference]: Start difference. First operand has 134 places, 99 transitions, 1087 flow. Second operand 8 states and 184 transitions. [2024-06-27 23:01:12,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1465 flow [2024-06-27 23:01:12,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 1328 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:12,745 INFO L231 Difference]: Finished difference. Result has 137 places, 103 transitions, 1043 flow [2024-06-27 23:01:12,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1043, PETRI_PLACES=137, PETRI_TRANSITIONS=103} [2024-06-27 23:01:12,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 23:01:12,746 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 103 transitions, 1043 flow [2024-06-27 23:01:12,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:12,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:12,746 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, 1] [2024-06-27 23:01:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:01:12,746 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)] === [2024-06-27 23:01:12,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1898239674, now seen corresponding path program 9 times [2024-06-27 23:01:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:12,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806769986] [2024-06-27 23:01:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806769986] [2024-06-27 23:01:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806769986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:12,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:12,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:12,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624496639] [2024-06-27 23:01:12,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:12,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:12,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 103 transitions, 1043 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:12,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:12,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:12,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:13,072 INFO L124 PetriNetUnfolderBase]: 823/1509 cut-off events. [2024-06-27 23:01:13,072 INFO L125 PetriNetUnfolderBase]: For 10755/10758 co-relation queries the response was YES. [2024-06-27 23:01:13,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6175 conditions, 1509 events. 823/1509 cut-off events. For 10755/10758 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8196 event pairs, 179 based on Foata normal form. 8/1511 useless extension candidates. Maximal degree in co-relation 6129. Up to 649 conditions per place. [2024-06-27 23:01:13,081 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 74 selfloop transitions, 52 changer transitions 0/134 dead transitions. [2024-06-27 23:01:13,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 134 transitions, 1441 flow [2024-06-27 23:01:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 23:01:13,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-27 23:01:13,083 INFO L175 Difference]: Start difference. First operand has 137 places, 103 transitions, 1043 flow. Second operand 8 states and 183 transitions. [2024-06-27 23:01:13,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 134 transitions, 1441 flow [2024-06-27 23:01:13,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 1348 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:13,102 INFO L231 Difference]: Finished difference. Result has 140 places, 106 transitions, 1093 flow [2024-06-27 23:01:13,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1093, PETRI_PLACES=140, PETRI_TRANSITIONS=106} [2024-06-27 23:01:13,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 23:01:13,103 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 106 transitions, 1093 flow [2024-06-27 23:01:13,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:13,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:13,103 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, 1] [2024-06-27 23:01:13,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:01:13,103 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)] === [2024-06-27 23:01:13,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash 716284720, now seen corresponding path program 10 times [2024-06-27 23:01:13,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:13,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250598958] [2024-06-27 23:01:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:13,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:13,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:13,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250598958] [2024-06-27 23:01:13,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250598958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:13,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:13,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:13,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607945166] [2024-06-27 23:01:13,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:13,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:13,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:13,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:13,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 106 transitions, 1093 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:13,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:13,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:13,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:13,475 INFO L124 PetriNetUnfolderBase]: 874/1598 cut-off events. [2024-06-27 23:01:13,475 INFO L125 PetriNetUnfolderBase]: For 12140/12143 co-relation queries the response was YES. [2024-06-27 23:01:13,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6733 conditions, 1598 events. 874/1598 cut-off events. For 12140/12143 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8819 event pairs, 286 based on Foata normal form. 8/1598 useless extension candidates. Maximal degree in co-relation 6687. Up to 1325 conditions per place. [2024-06-27 23:01:13,486 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 109 selfloop transitions, 18 changer transitions 0/135 dead transitions. [2024-06-27 23:01:13,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 135 transitions, 1482 flow [2024-06-27 23:01:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 23:01:13,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-27 23:01:13,487 INFO L175 Difference]: Start difference. First operand has 140 places, 106 transitions, 1093 flow. Second operand 8 states and 178 transitions. [2024-06-27 23:01:13,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 135 transitions, 1482 flow [2024-06-27 23:01:13,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 135 transitions, 1402 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:13,507 INFO L231 Difference]: Finished difference. Result has 146 places, 112 transitions, 1135 flow [2024-06-27 23:01:13,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1135, PETRI_PLACES=146, PETRI_TRANSITIONS=112} [2024-06-27 23:01:13,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 23:01:13,508 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 112 transitions, 1135 flow [2024-06-27 23:01:13,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:13,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:13,508 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, 1] [2024-06-27 23:01:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:01:13,509 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)] === [2024-06-27 23:01:13,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 715839250, now seen corresponding path program 11 times [2024-06-27 23:01:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308402696] [2024-06-27 23:01:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:13,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:13,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:13,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308402696] [2024-06-27 23:01:13,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308402696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:13,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:13,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:13,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192661750] [2024-06-27 23:01:13,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:13,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:13,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:13,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:13,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 112 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:13,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:13,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:13,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:13,831 INFO L124 PetriNetUnfolderBase]: 944/1721 cut-off events. [2024-06-27 23:01:13,831 INFO L125 PetriNetUnfolderBase]: For 14936/14939 co-relation queries the response was YES. [2024-06-27 23:01:13,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7196 conditions, 1721 events. 944/1721 cut-off events. For 14936/14939 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9656 event pairs, 336 based on Foata normal form. 8/1716 useless extension candidates. Maximal degree in co-relation 7147. Up to 1201 conditions per place. [2024-06-27 23:01:13,842 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-27 23:01:13,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 141 transitions, 1599 flow [2024-06-27 23:01:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 23:01:13,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-27 23:01:13,843 INFO L175 Difference]: Start difference. First operand has 146 places, 112 transitions, 1135 flow. Second operand 8 states and 177 transitions. [2024-06-27 23:01:13,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 141 transitions, 1599 flow [2024-06-27 23:01:13,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 141 transitions, 1552 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:13,868 INFO L231 Difference]: Finished difference. Result has 153 places, 118 transitions, 1271 flow [2024-06-27 23:01:13,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1271, PETRI_PLACES=153, PETRI_TRANSITIONS=118} [2024-06-27 23:01:13,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 23:01:13,868 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 118 transitions, 1271 flow [2024-06-27 23:01:13,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:13,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:13,869 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, 1] [2024-06-27 23:01:13,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:01:13,869 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)] === [2024-06-27 23:01:13,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:13,869 INFO L85 PathProgramCache]: Analyzing trace with hash 705719920, now seen corresponding path program 12 times [2024-06-27 23:01:13,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:13,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711948118] [2024-06-27 23:01:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:13,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:13,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:13,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711948118] [2024-06-27 23:01:13,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711948118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:13,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:13,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:13,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761912343] [2024-06-27 23:01:13,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:13,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:13,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:13,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:14,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:14,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 118 transitions, 1271 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:14,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:14,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:14,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:14,224 INFO L124 PetriNetUnfolderBase]: 931/1700 cut-off events. [2024-06-27 23:01:14,224 INFO L125 PetriNetUnfolderBase]: For 15203/15206 co-relation queries the response was YES. [2024-06-27 23:01:14,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7223 conditions, 1700 events. 931/1700 cut-off events. For 15203/15206 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9565 event pairs, 345 based on Foata normal form. 8/1697 useless extension candidates. Maximal degree in co-relation 7171. Up to 1349 conditions per place. [2024-06-27 23:01:14,235 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 99 selfloop transitions, 28 changer transitions 0/135 dead transitions. [2024-06-27 23:01:14,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 135 transitions, 1583 flow [2024-06-27 23:01:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 23:01:14,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-27 23:01:14,237 INFO L175 Difference]: Start difference. First operand has 153 places, 118 transitions, 1271 flow. Second operand 8 states and 169 transitions. [2024-06-27 23:01:14,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 135 transitions, 1583 flow [2024-06-27 23:01:14,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 135 transitions, 1532 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:14,263 INFO L231 Difference]: Finished difference. Result has 160 places, 119 transitions, 1301 flow [2024-06-27 23:01:14,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1301, PETRI_PLACES=160, PETRI_TRANSITIONS=119} [2024-06-27 23:01:14,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-27 23:01:14,263 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 119 transitions, 1301 flow [2024-06-27 23:01:14,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:14,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:14,264 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, 1] [2024-06-27 23:01:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:01:14,264 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)] === [2024-06-27 23:01:14,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash -404956450, now seen corresponding path program 13 times [2024-06-27 23:01:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346262999] [2024-06-27 23:01:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:14,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346262999] [2024-06-27 23:01:14,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346262999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:14,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:14,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:14,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44191019] [2024-06-27 23:01:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:14,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:14,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 119 transitions, 1301 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:14,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:14,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:14,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:14,690 INFO L124 PetriNetUnfolderBase]: 918/1680 cut-off events. [2024-06-27 23:01:14,690 INFO L125 PetriNetUnfolderBase]: For 14541/14544 co-relation queries the response was YES. [2024-06-27 23:01:14,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6971 conditions, 1680 events. 918/1680 cut-off events. For 14541/14544 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9408 event pairs, 294 based on Foata normal form. 6/1672 useless extension candidates. Maximal degree in co-relation 6917. Up to 1190 conditions per place. [2024-06-27 23:01:14,701 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 95 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-27 23:01:14,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 145 transitions, 1661 flow [2024-06-27 23:01:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 23:01:14,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 23:01:14,702 INFO L175 Difference]: Start difference. First operand has 160 places, 119 transitions, 1301 flow. Second operand 7 states and 164 transitions. [2024-06-27 23:01:14,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 145 transitions, 1661 flow [2024-06-27 23:01:14,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 145 transitions, 1573 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:14,727 INFO L231 Difference]: Finished difference. Result has 162 places, 120 transitions, 1345 flow [2024-06-27 23:01:14,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=162, PETRI_TRANSITIONS=120} [2024-06-27 23:01:14,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 23:01:14,728 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 120 transitions, 1345 flow [2024-06-27 23:01:14,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:14,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:14,728 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, 1] [2024-06-27 23:01:14,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:01:14,728 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)] === [2024-06-27 23:01:14,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1070949230, now seen corresponding path program 14 times [2024-06-27 23:01:14,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:14,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360867633] [2024-06-27 23:01:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:14,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:14,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360867633] [2024-06-27 23:01:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360867633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:14,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:14,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:14,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393226304] [2024-06-27 23:01:14,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:14,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:14,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:14,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:14,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 120 transitions, 1345 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:14,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:14,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:14,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:15,115 INFO L124 PetriNetUnfolderBase]: 957/1755 cut-off events. [2024-06-27 23:01:15,115 INFO L125 PetriNetUnfolderBase]: For 16310/16310 co-relation queries the response was YES. [2024-06-27 23:01:15,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1755 events. 957/1755 cut-off events. For 16310/16310 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10026 event pairs, 343 based on Foata normal form. 6/1746 useless extension candidates. Maximal degree in co-relation 7512. Up to 1382 conditions per place. [2024-06-27 23:01:15,128 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 107 selfloop transitions, 36 changer transitions 0/151 dead transitions. [2024-06-27 23:01:15,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 151 transitions, 1884 flow [2024-06-27 23:01:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:01:15,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-27 23:01:15,129 INFO L175 Difference]: Start difference. First operand has 162 places, 120 transitions, 1345 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:01:15,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 151 transitions, 1884 flow [2024-06-27 23:01:15,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 151 transitions, 1784 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:15,159 INFO L231 Difference]: Finished difference. Result has 169 places, 133 transitions, 1552 flow [2024-06-27 23:01:15,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1552, PETRI_PLACES=169, PETRI_TRANSITIONS=133} [2024-06-27 23:01:15,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 23:01:15,160 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 133 transitions, 1552 flow [2024-06-27 23:01:15,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:15,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:15,160 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, 1] [2024-06-27 23:01:15,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:01:15,160 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)] === [2024-06-27 23:01:15,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1209260124, now seen corresponding path program 15 times [2024-06-27 23:01:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:15,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130930036] [2024-06-27 23:01:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:15,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130930036] [2024-06-27 23:01:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130930036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:15,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:15,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:15,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416073383] [2024-06-27 23:01:15,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:15,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:15,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:15,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:15,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 133 transitions, 1552 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:15,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:15,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:15,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:15,517 INFO L124 PetriNetUnfolderBase]: 944/1740 cut-off events. [2024-06-27 23:01:15,518 INFO L125 PetriNetUnfolderBase]: For 13809/13815 co-relation queries the response was YES. [2024-06-27 23:01:15,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7296 conditions, 1740 events. 944/1740 cut-off events. For 13809/13815 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9977 event pairs, 307 based on Foata normal form. 10/1734 useless extension candidates. Maximal degree in co-relation 7237. Up to 1223 conditions per place. [2024-06-27 23:01:15,530 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 98 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-06-27 23:01:15,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 154 transitions, 1900 flow [2024-06-27 23:01:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 23:01:15,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-27 23:01:15,531 INFO L175 Difference]: Start difference. First operand has 169 places, 133 transitions, 1552 flow. Second operand 7 states and 159 transitions. [2024-06-27 23:01:15,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 154 transitions, 1900 flow [2024-06-27 23:01:15,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 154 transitions, 1842 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-27 23:01:15,560 INFO L231 Difference]: Finished difference. Result has 175 places, 133 transitions, 1602 flow [2024-06-27 23:01:15,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1602, PETRI_PLACES=175, PETRI_TRANSITIONS=133} [2024-06-27 23:01:15,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 23:01:15,561 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 133 transitions, 1602 flow [2024-06-27 23:01:15,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:15,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:15,562 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, 1] [2024-06-27 23:01:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:01:15,562 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)] === [2024-06-27 23:01:15,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 111347506, now seen corresponding path program 16 times [2024-06-27 23:01:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:15,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680814721] [2024-06-27 23:01:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:15,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680814721] [2024-06-27 23:01:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680814721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:15,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199367711] [2024-06-27 23:01:15,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:15,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:15,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:15,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:15,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 133 transitions, 1602 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:15,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:15,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:15,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:15,980 INFO L124 PetriNetUnfolderBase]: 964/1808 cut-off events. [2024-06-27 23:01:15,980 INFO L125 PetriNetUnfolderBase]: For 14815/14821 co-relation queries the response was YES. [2024-06-27 23:01:15,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7592 conditions, 1808 events. 964/1808 cut-off events. For 14815/14821 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10492 event pairs, 204 based on Foata normal form. 10/1815 useless extension candidates. Maximal degree in co-relation 7532. Up to 1329 conditions per place. [2024-06-27 23:01:15,991 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 122 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-27 23:01:15,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 159 transitions, 1997 flow [2024-06-27 23:01:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 23:01:15,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-27 23:01:15,992 INFO L175 Difference]: Start difference. First operand has 175 places, 133 transitions, 1602 flow. Second operand 7 states and 163 transitions. [2024-06-27 23:01:15,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 159 transitions, 1997 flow [2024-06-27 23:01:16,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 159 transitions, 1859 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:16,020 INFO L231 Difference]: Finished difference. Result has 174 places, 134 transitions, 1550 flow [2024-06-27 23:01:16,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1550, PETRI_PLACES=174, PETRI_TRANSITIONS=134} [2024-06-27 23:01:16,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-27 23:01:16,020 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 134 transitions, 1550 flow [2024-06-27 23:01:16,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:16,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:16,021 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, 1] [2024-06-27 23:01:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:01:16,021 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)] === [2024-06-27 23:01:16,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:16,021 INFO L85 PathProgramCache]: Analyzing trace with hash 111334486, now seen corresponding path program 17 times [2024-06-27 23:01:16,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:16,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767291976] [2024-06-27 23:01:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:16,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:16,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767291976] [2024-06-27 23:01:16,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767291976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:16,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:16,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:16,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783008591] [2024-06-27 23:01:16,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:16,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:16,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:16,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:16,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 134 transitions, 1550 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:16,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:16,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:16,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:16,417 INFO L124 PetriNetUnfolderBase]: 951/1784 cut-off events. [2024-06-27 23:01:16,417 INFO L125 PetriNetUnfolderBase]: For 12487/12493 co-relation queries the response was YES. [2024-06-27 23:01:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7249 conditions, 1784 events. 951/1784 cut-off events. For 12487/12493 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10365 event pairs, 178 based on Foata normal form. 10/1788 useless extension candidates. Maximal degree in co-relation 7191. Up to 703 conditions per place. [2024-06-27 23:01:16,430 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 79 selfloop transitions, 73 changer transitions 0/160 dead transitions. [2024-06-27 23:01:16,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 160 transitions, 1932 flow [2024-06-27 23:01:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 23:01:16,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 23:01:16,437 INFO L175 Difference]: Start difference. First operand has 174 places, 134 transitions, 1550 flow. Second operand 7 states and 164 transitions. [2024-06-27 23:01:16,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 160 transitions, 1932 flow [2024-06-27 23:01:16,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 160 transitions, 1775 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:16,470 INFO L231 Difference]: Finished difference. Result has 174 places, 134 transitions, 1549 flow [2024-06-27 23:01:16,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1549, PETRI_PLACES=174, PETRI_TRANSITIONS=134} [2024-06-27 23:01:16,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-27 23:01:16,470 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 134 transitions, 1549 flow [2024-06-27 23:01:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:16,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:16,471 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, 1, 1, 1] [2024-06-27 23:01:16,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:01:16,471 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)] === [2024-06-27 23:01:16,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash -476898989, now seen corresponding path program 1 times [2024-06-27 23:01:16,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:16,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576870202] [2024-06-27 23:01:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:16,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:16,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:16,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576870202] [2024-06-27 23:01:16,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576870202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:16,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:16,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:16,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613020383] [2024-06-27 23:01:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:16,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:16,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:16,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:16,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 134 transitions, 1549 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:16,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:16,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:16,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:16,917 INFO L124 PetriNetUnfolderBase]: 1120/2077 cut-off events. [2024-06-27 23:01:16,917 INFO L125 PetriNetUnfolderBase]: For 16124/16130 co-relation queries the response was YES. [2024-06-27 23:01:16,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8397 conditions, 2077 events. 1120/2077 cut-off events. For 16124/16130 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12325 event pairs, 322 based on Foata normal form. 19/2087 useless extension candidates. Maximal degree in co-relation 8341. Up to 1071 conditions per place. [2024-06-27 23:01:16,932 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 112 selfloop transitions, 43 changer transitions 16/179 dead transitions. [2024-06-27 23:01:16,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 179 transitions, 2074 flow [2024-06-27 23:01:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 23:01:16,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-27 23:01:16,934 INFO L175 Difference]: Start difference. First operand has 174 places, 134 transitions, 1549 flow. Second operand 9 states and 214 transitions. [2024-06-27 23:01:16,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 179 transitions, 2074 flow [2024-06-27 23:01:16,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 1912 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:16,962 INFO L231 Difference]: Finished difference. Result has 177 places, 132 transitions, 1469 flow [2024-06-27 23:01:16,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=177, PETRI_TRANSITIONS=132} [2024-06-27 23:01:16,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 23:01:16,962 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 132 transitions, 1469 flow [2024-06-27 23:01:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:16,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:16,963 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, 1, 1, 1] [2024-06-27 23:01:16,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:01:16,963 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)] === [2024-06-27 23:01:16,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash -899461025, now seen corresponding path program 2 times [2024-06-27 23:01:16,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:16,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42788956] [2024-06-27 23:01:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42788956] [2024-06-27 23:01:17,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42788956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:17,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:17,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:17,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653707061] [2024-06-27 23:01:17,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:17,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:17,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:17,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:17,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 132 transitions, 1469 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:17,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:17,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:17,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:17,429 INFO L124 PetriNetUnfolderBase]: 1150/2133 cut-off events. [2024-06-27 23:01:17,430 INFO L125 PetriNetUnfolderBase]: For 14272/14278 co-relation queries the response was YES. [2024-06-27 23:01:17,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8388 conditions, 2133 events. 1150/2133 cut-off events. For 14272/14278 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12738 event pairs, 395 based on Foata normal form. 19/2143 useless extension candidates. Maximal degree in co-relation 8332. Up to 1071 conditions per place. [2024-06-27 23:01:17,444 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 126 selfloop transitions, 35 changer transitions 8/177 dead transitions. [2024-06-27 23:01:17,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 177 transitions, 2018 flow [2024-06-27 23:01:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 23:01:17,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-27 23:01:17,446 INFO L175 Difference]: Start difference. First operand has 177 places, 132 transitions, 1469 flow. Second operand 9 states and 214 transitions. [2024-06-27 23:01:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 177 transitions, 2018 flow [2024-06-27 23:01:17,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 1930 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:17,471 INFO L231 Difference]: Finished difference. Result has 177 places, 131 transitions, 1454 flow [2024-06-27 23:01:17,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1454, PETRI_PLACES=177, PETRI_TRANSITIONS=131} [2024-06-27 23:01:17,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 23:01:17,472 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 131 transitions, 1454 flow [2024-06-27 23:01:17,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:17,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:17,473 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, 1, 1, 1] [2024-06-27 23:01:17,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:01:17,473 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)] === [2024-06-27 23:01:17,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:17,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1215333665, now seen corresponding path program 3 times [2024-06-27 23:01:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:17,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747358590] [2024-06-27 23:01:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:17,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:17,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747358590] [2024-06-27 23:01:17,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747358590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:17,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:17,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:17,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683567095] [2024-06-27 23:01:17,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:17,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:17,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:17,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:17,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 131 transitions, 1454 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:17,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:17,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:17,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:17,963 INFO L124 PetriNetUnfolderBase]: 1045/1946 cut-off events. [2024-06-27 23:01:17,963 INFO L125 PetriNetUnfolderBase]: For 12212/12218 co-relation queries the response was YES. [2024-06-27 23:01:17,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7640 conditions, 1946 events. 1045/1946 cut-off events. For 12212/12218 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11408 event pairs, 383 based on Foata normal form. 19/1956 useless extension candidates. Maximal degree in co-relation 7584. Up to 1071 conditions per place. [2024-06-27 23:01:17,977 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 32 changer transitions 19/170 dead transitions. [2024-06-27 23:01:17,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 170 transitions, 1933 flow [2024-06-27 23:01:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 23:01:17,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-27 23:01:17,978 INFO L175 Difference]: Start difference. First operand has 177 places, 131 transitions, 1454 flow. Second operand 9 states and 208 transitions. [2024-06-27 23:01:17,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 170 transitions, 1933 flow [2024-06-27 23:01:17,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 170 transitions, 1862 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:18,000 INFO L231 Difference]: Finished difference. Result has 178 places, 127 transitions, 1404 flow [2024-06-27 23:01:18,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1404, PETRI_PLACES=178, PETRI_TRANSITIONS=127} [2024-06-27 23:01:18,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-27 23:01:18,000 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 127 transitions, 1404 flow [2024-06-27 23:01:18,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:18,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:18,001 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, 1, 1, 1] [2024-06-27 23:01:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:01:18,001 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)] === [2024-06-27 23:01:18,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1275330127, now seen corresponding path program 4 times [2024-06-27 23:01:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:18,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27850113] [2024-06-27 23:01:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:18,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27850113] [2024-06-27 23:01:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27850113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:18,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:18,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520982826] [2024-06-27 23:01:18,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:18,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:18,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:18,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:18,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:18,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 127 transitions, 1404 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:18,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:18,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:18,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:18,416 INFO L124 PetriNetUnfolderBase]: 1110/2061 cut-off events. [2024-06-27 23:01:18,417 INFO L125 PetriNetUnfolderBase]: For 13571/13577 co-relation queries the response was YES. [2024-06-27 23:01:18,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8108 conditions, 2061 events. 1110/2061 cut-off events. For 13571/13577 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12303 event pairs, 395 based on Foata normal form. 19/2071 useless extension candidates. Maximal degree in co-relation 8052. Up to 1380 conditions per place. [2024-06-27 23:01:18,430 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 112 selfloop transitions, 34 changer transitions 8/162 dead transitions. [2024-06-27 23:01:18,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 162 transitions, 1857 flow [2024-06-27 23:01:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 23:01:18,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-27 23:01:18,432 INFO L175 Difference]: Start difference. First operand has 178 places, 127 transitions, 1404 flow. Second operand 9 states and 203 transitions. [2024-06-27 23:01:18,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 162 transitions, 1857 flow [2024-06-27 23:01:18,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 162 transitions, 1773 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:18,454 INFO L231 Difference]: Finished difference. Result has 172 places, 126 transitions, 1383 flow [2024-06-27 23:01:18,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1383, PETRI_PLACES=172, PETRI_TRANSITIONS=126} [2024-06-27 23:01:18,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 23:01:18,455 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 126 transitions, 1383 flow [2024-06-27 23:01:18,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:18,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:18,455 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, 1, 1, 1] [2024-06-27 23:01:18,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:01:18,455 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)] === [2024-06-27 23:01:18,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:18,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1274944177, now seen corresponding path program 5 times [2024-06-27 23:01:18,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:18,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523033951] [2024-06-27 23:01:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:18,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:18,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523033951] [2024-06-27 23:01:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523033951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134102345] [2024-06-27 23:01:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:18,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:18,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 126 transitions, 1383 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:18,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:18,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:18,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:18,835 INFO L124 PetriNetUnfolderBase]: 1005/1876 cut-off events. [2024-06-27 23:01:18,836 INFO L125 PetriNetUnfolderBase]: For 11481/11487 co-relation queries the response was YES. [2024-06-27 23:01:18,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7326 conditions, 1876 events. 1005/1876 cut-off events. For 11481/11487 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10962 event pairs, 377 based on Foata normal form. 19/1886 useless extension candidates. Maximal degree in co-relation 7272. Up to 1380 conditions per place. [2024-06-27 23:01:18,846 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 96 selfloop transitions, 29 changer transitions 22/155 dead transitions. [2024-06-27 23:01:18,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 155 transitions, 1766 flow [2024-06-27 23:01:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 23:01:18,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-27 23:01:18,847 INFO L175 Difference]: Start difference. First operand has 172 places, 126 transitions, 1383 flow. Second operand 9 states and 197 transitions. [2024-06-27 23:01:18,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 155 transitions, 1766 flow [2024-06-27 23:01:18,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 155 transitions, 1697 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:18,865 INFO L231 Difference]: Finished difference. Result has 172 places, 120 transitions, 1296 flow [2024-06-27 23:01:18,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1296, PETRI_PLACES=172, PETRI_TRANSITIONS=120} [2024-06-27 23:01:18,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 23:01:18,866 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 120 transitions, 1296 flow [2024-06-27 23:01:18,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:18,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:18,866 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, 1, 1, 1] [2024-06-27 23:01:18,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:01:18,867 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)] === [2024-06-27 23:01:18,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1294077267, now seen corresponding path program 6 times [2024-06-27 23:01:18,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:18,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263862902] [2024-06-27 23:01:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:18,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:19,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:19,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263862902] [2024-06-27 23:01:19,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263862902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:19,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:19,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:19,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574170426] [2024-06-27 23:01:19,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:19,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:19,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:19,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:19,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 120 transitions, 1296 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:19,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:19,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:19,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:19,360 INFO L124 PetriNetUnfolderBase]: 1070/1989 cut-off events. [2024-06-27 23:01:19,360 INFO L125 PetriNetUnfolderBase]: For 12974/12980 co-relation queries the response was YES. [2024-06-27 23:01:19,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7724 conditions, 1989 events. 1070/1989 cut-off events. For 12974/12980 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11806 event pairs, 383 based on Foata normal form. 19/1999 useless extension candidates. Maximal degree in co-relation 7671. Up to 1286 conditions per place. [2024-06-27 23:01:19,375 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 104 selfloop transitions, 31 changer transitions 10/153 dead transitions. [2024-06-27 23:01:19,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 153 transitions, 1730 flow [2024-06-27 23:01:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 23:01:19,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-27 23:01:19,376 INFO L175 Difference]: Start difference. First operand has 172 places, 120 transitions, 1296 flow. Second operand 9 states and 201 transitions. [2024-06-27 23:01:19,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 153 transitions, 1730 flow [2024-06-27 23:01:19,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 153 transitions, 1658 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:19,397 INFO L231 Difference]: Finished difference. Result has 166 places, 117 transitions, 1254 flow [2024-06-27 23:01:19,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1254, PETRI_PLACES=166, PETRI_TRANSITIONS=117} [2024-06-27 23:01:19,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-27 23:01:19,397 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 117 transitions, 1254 flow [2024-06-27 23:01:19,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:19,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:19,398 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, 1, 1, 1] [2024-06-27 23:01:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:01:19,398 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)] === [2024-06-27 23:01:19,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1646803633, now seen corresponding path program 7 times [2024-06-27 23:01:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:19,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887031389] [2024-06-27 23:01:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:19,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:19,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:19,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887031389] [2024-06-27 23:01:19,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887031389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:19,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:19,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:19,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288913981] [2024-06-27 23:01:19,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:19,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:19,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:19,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:19,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 117 transitions, 1254 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:19,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:19,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:19,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:19,839 INFO L124 PetriNetUnfolderBase]: 1046/1959 cut-off events. [2024-06-27 23:01:19,839 INFO L125 PetriNetUnfolderBase]: For 12630/12636 co-relation queries the response was YES. [2024-06-27 23:01:19,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7557 conditions, 1959 events. 1046/1959 cut-off events. For 12630/12636 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11597 event pairs, 446 based on Foata normal form. 19/1969 useless extension candidates. Maximal degree in co-relation 7505. Up to 1473 conditions per place. [2024-06-27 23:01:19,852 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 94 selfloop transitions, 25 changer transitions 22/149 dead transitions. [2024-06-27 23:01:19,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 149 transitions, 1648 flow [2024-06-27 23:01:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 23:01:19,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-27 23:01:19,853 INFO L175 Difference]: Start difference. First operand has 166 places, 117 transitions, 1254 flow. Second operand 10 states and 214 transitions. [2024-06-27 23:01:19,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 149 transitions, 1648 flow [2024-06-27 23:01:19,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 149 transitions, 1587 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:19,872 INFO L231 Difference]: Finished difference. Result has 169 places, 115 transitions, 1231 flow [2024-06-27 23:01:19,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1231, PETRI_PLACES=169, PETRI_TRANSITIONS=115} [2024-06-27 23:01:19,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 23:01:19,873 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 115 transitions, 1231 flow [2024-06-27 23:01:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:19,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:19,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:19,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:01:19,874 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)] === [2024-06-27 23:01:19,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1336186191, now seen corresponding path program 8 times [2024-06-27 23:01:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:19,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201400815] [2024-06-27 23:01:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:19,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:19,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201400815] [2024-06-27 23:01:19,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201400815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:19,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109461410] [2024-06-27 23:01:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:20,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:20,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 115 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:20,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:20,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:20,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:20,281 INFO L124 PetriNetUnfolderBase]: 937/1758 cut-off events. [2024-06-27 23:01:20,281 INFO L125 PetriNetUnfolderBase]: For 10996/11002 co-relation queries the response was YES. [2024-06-27 23:01:20,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 1758 events. 937/1758 cut-off events. For 10996/11002 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10168 event pairs, 365 based on Foata normal form. 19/1768 useless extension candidates. Maximal degree in co-relation 6697. Up to 1286 conditions per place. [2024-06-27 23:01:20,292 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 19 changer transitions 28/141 dead transitions. [2024-06-27 23:01:20,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 141 transitions, 1581 flow [2024-06-27 23:01:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 23:01:20,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-27 23:01:20,293 INFO L175 Difference]: Start difference. First operand has 169 places, 115 transitions, 1231 flow. Second operand 9 states and 195 transitions. [2024-06-27 23:01:20,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 141 transitions, 1581 flow [2024-06-27 23:01:20,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 141 transitions, 1530 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:20,310 INFO L231 Difference]: Finished difference. Result has 167 places, 104 transitions, 1054 flow [2024-06-27 23:01:20,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1054, PETRI_PLACES=167, PETRI_TRANSITIONS=104} [2024-06-27 23:01:20,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-27 23:01:20,311 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 104 transitions, 1054 flow [2024-06-27 23:01:20,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:20,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:20,311 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, 1, 1, 1] [2024-06-27 23:01:20,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:01:20,312 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)] === [2024-06-27 23:01:20,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2015462863, now seen corresponding path program 9 times [2024-06-27 23:01:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:20,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44217429] [2024-06-27 23:01:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44217429] [2024-06-27 23:01:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44217429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:20,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975229110] [2024-06-27 23:01:20,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:20,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:20,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 104 transitions, 1054 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:20,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:20,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:20,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:20,713 INFO L124 PetriNetUnfolderBase]: 986/1821 cut-off events. [2024-06-27 23:01:20,713 INFO L125 PetriNetUnfolderBase]: For 11727/11733 co-relation queries the response was YES. [2024-06-27 23:01:20,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6915 conditions, 1821 events. 986/1821 cut-off events. For 11727/11733 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10687 event pairs, 381 based on Foata normal form. 22/1835 useless extension candidates. Maximal degree in co-relation 6863. Up to 923 conditions per place. [2024-06-27 23:01:20,724 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 32 changer transitions 16/145 dead transitions. [2024-06-27 23:01:20,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 145 transitions, 1494 flow [2024-06-27 23:01:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:01:20,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-27 23:01:20,726 INFO L175 Difference]: Start difference. First operand has 167 places, 104 transitions, 1054 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:01:20,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 145 transitions, 1494 flow [2024-06-27 23:01:20,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 145 transitions, 1386 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-06-27 23:01:20,743 INFO L231 Difference]: Finished difference. Result has 151 places, 102 transitions, 1004 flow [2024-06-27 23:01:20,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1004, PETRI_PLACES=151, PETRI_TRANSITIONS=102} [2024-06-27 23:01:20,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 23:01:20,744 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 102 transitions, 1004 flow [2024-06-27 23:01:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:20,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:20,744 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, 1, 1, 1] [2024-06-27 23:01:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:01:20,744 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)] === [2024-06-27 23:01:20,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1488859825, now seen corresponding path program 10 times [2024-06-27 23:01:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020913735] [2024-06-27 23:01:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:20,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:20,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020913735] [2024-06-27 23:01:20,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020913735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:20,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:20,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:20,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555328229] [2024-06-27 23:01:20,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:20,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:20,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:20,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:20,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 102 transitions, 1004 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:20,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:20,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:20,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:21,134 INFO L124 PetriNetUnfolderBase]: 1016/1877 cut-off events. [2024-06-27 23:01:21,135 INFO L125 PetriNetUnfolderBase]: For 13273/13279 co-relation queries the response was YES. [2024-06-27 23:01:21,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7288 conditions, 1877 events. 1016/1877 cut-off events. For 13273/13279 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11167 event pairs, 418 based on Foata normal form. 22/1891 useless extension candidates. Maximal degree in co-relation 7240. Up to 923 conditions per place. [2024-06-27 23:01:21,146 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 103 selfloop transitions, 24 changer transitions 8/143 dead transitions. [2024-06-27 23:01:21,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 143 transitions, 1470 flow [2024-06-27 23:01:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:01:21,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-27 23:01:21,147 INFO L175 Difference]: Start difference. First operand has 151 places, 102 transitions, 1004 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:01:21,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 143 transitions, 1470 flow [2024-06-27 23:01:21,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 143 transitions, 1404 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:21,163 INFO L231 Difference]: Finished difference. Result has 151 places, 101 transitions, 990 flow [2024-06-27 23:01:21,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=990, PETRI_PLACES=151, PETRI_TRANSITIONS=101} [2024-06-27 23:01:21,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 23:01:21,164 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 101 transitions, 990 flow [2024-06-27 23:01:21,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:21,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:21,164 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, 1, 1, 1] [2024-06-27 23:01:21,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:01:21,164 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)] === [2024-06-27 23:01:21,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 614441555, now seen corresponding path program 11 times [2024-06-27 23:01:21,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:21,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316205762] [2024-06-27 23:01:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:21,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:21,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316205762] [2024-06-27 23:01:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316205762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:21,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:21,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:21,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089552164] [2024-06-27 23:01:21,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:21,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:21,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:21,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:21,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 101 transitions, 990 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:21,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:21,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:21,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:21,486 INFO L124 PetriNetUnfolderBase]: 911/1690 cut-off events. [2024-06-27 23:01:21,486 INFO L125 PetriNetUnfolderBase]: For 11281/11287 co-relation queries the response was YES. [2024-06-27 23:01:21,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6540 conditions, 1690 events. 911/1690 cut-off events. For 11281/11287 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9832 event pairs, 406 based on Foata normal form. 22/1704 useless extension candidates. Maximal degree in co-relation 6492. Up to 923 conditions per place. [2024-06-27 23:01:21,499 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 21 changer transitions 19/136 dead transitions. [2024-06-27 23:01:21,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 136 transitions, 1386 flow [2024-06-27 23:01:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 23:01:21,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-27 23:01:21,500 INFO L175 Difference]: Start difference. First operand has 151 places, 101 transitions, 990 flow. Second operand 9 states and 203 transitions. [2024-06-27 23:01:21,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 136 transitions, 1386 flow [2024-06-27 23:01:21,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 136 transitions, 1330 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:21,515 INFO L231 Difference]: Finished difference. Result has 151 places, 97 transitions, 937 flow [2024-06-27 23:01:21,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=937, PETRI_PLACES=151, PETRI_TRANSITIONS=97} [2024-06-27 23:01:21,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 23:01:21,516 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 97 transitions, 937 flow [2024-06-27 23:01:21,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:21,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:21,517 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, 1, 1, 1] [2024-06-27 23:01:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:01:21,517 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)] === [2024-06-27 23:01:21,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash -543150159, now seen corresponding path program 12 times [2024-06-27 23:01:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:21,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845068202] [2024-06-27 23:01:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:21,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:21,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:21,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845068202] [2024-06-27 23:01:21,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845068202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:21,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:21,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:21,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583100694] [2024-06-27 23:01:21,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:21,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:21,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:21,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:21,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:21,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 97 transitions, 937 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:21,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:21,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:21,887 INFO L124 PetriNetUnfolderBase]: 976/1805 cut-off events. [2024-06-27 23:01:21,887 INFO L125 PetriNetUnfolderBase]: For 12701/12707 co-relation queries the response was YES. [2024-06-27 23:01:21,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6966 conditions, 1805 events. 976/1805 cut-off events. For 12701/12707 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10690 event pairs, 418 based on Foata normal form. 22/1819 useless extension candidates. Maximal degree in co-relation 6919. Up to 1228 conditions per place. [2024-06-27 23:01:21,898 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 23 changer transitions 8/128 dead transitions. [2024-06-27 23:01:21,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 128 transitions, 1305 flow [2024-06-27 23:01:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 23:01:21,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-27 23:01:21,899 INFO L175 Difference]: Start difference. First operand has 151 places, 97 transitions, 937 flow. Second operand 9 states and 198 transitions. [2024-06-27 23:01:21,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 128 transitions, 1305 flow [2024-06-27 23:01:21,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 128 transitions, 1247 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:21,916 INFO L231 Difference]: Finished difference. Result has 146 places, 96 transitions, 921 flow [2024-06-27 23:01:21,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=146, PETRI_TRANSITIONS=96} [2024-06-27 23:01:21,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 23:01:21,917 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 96 transitions, 921 flow [2024-06-27 23:01:21,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:21,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:21,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:21,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:01:21,918 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)] === [2024-06-27 23:01:21,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:21,918 INFO L85 PathProgramCache]: Analyzing trace with hash -542764209, now seen corresponding path program 13 times [2024-06-27 23:01:21,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:21,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177069521] [2024-06-27 23:01:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:21,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:22,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:22,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177069521] [2024-06-27 23:01:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177069521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:22,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:22,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212650389] [2024-06-27 23:01:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:22,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:22,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:22,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:22,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 96 transitions, 921 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:22,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:22,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:22,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:22,260 INFO L124 PetriNetUnfolderBase]: 871/1620 cut-off events. [2024-06-27 23:01:22,260 INFO L125 PetriNetUnfolderBase]: For 10815/10821 co-relation queries the response was YES. [2024-06-27 23:01:22,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6241 conditions, 1620 events. 871/1620 cut-off events. For 10815/10821 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9378 event pairs, 400 based on Foata normal form. 22/1634 useless extension candidates. Maximal degree in co-relation 6195. Up to 1228 conditions per place. [2024-06-27 23:01:22,269 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 73 selfloop transitions, 19 changer transitions 21/121 dead transitions. [2024-06-27 23:01:22,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 121 transitions, 1221 flow [2024-06-27 23:01:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 23:01:22,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-27 23:01:22,271 INFO L175 Difference]: Start difference. First operand has 146 places, 96 transitions, 921 flow. Second operand 9 states and 192 transitions. [2024-06-27 23:01:22,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 121 transitions, 1221 flow [2024-06-27 23:01:22,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 121 transitions, 1171 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:22,286 INFO L231 Difference]: Finished difference. Result has 146 places, 91 transitions, 855 flow [2024-06-27 23:01:22,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=855, PETRI_PLACES=146, PETRI_TRANSITIONS=91} [2024-06-27 23:01:22,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 23:01:22,286 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 91 transitions, 855 flow [2024-06-27 23:01:22,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:22,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:22,287 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, 1, 1, 1] [2024-06-27 23:01:22,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:01:22,287 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)] === [2024-06-27 23:01:22,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1191134901, now seen corresponding path program 14 times [2024-06-27 23:01:22,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:22,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496102990] [2024-06-27 23:01:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:22,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:22,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:22,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496102990] [2024-06-27 23:01:22,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496102990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:22,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:22,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110798682] [2024-06-27 23:01:22,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:22,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:22,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 91 transitions, 855 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:22,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:22,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:22,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:22,660 INFO L124 PetriNetUnfolderBase]: 860/1611 cut-off events. [2024-06-27 23:01:22,661 INFO L125 PetriNetUnfolderBase]: For 10567/10573 co-relation queries the response was YES. [2024-06-27 23:01:22,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6075 conditions, 1611 events. 860/1611 cut-off events. For 10567/10573 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9332 event pairs, 265 based on Foata normal form. 22/1630 useless extension candidates. Maximal degree in co-relation 6030. Up to 632 conditions per place. [2024-06-27 23:01:22,670 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 69 selfloop transitions, 34 changer transitions 16/127 dead transitions. [2024-06-27 23:01:22,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 127 transitions, 1239 flow [2024-06-27 23:01:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 23:01:22,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-27 23:01:22,671 INFO L175 Difference]: Start difference. First operand has 146 places, 91 transitions, 855 flow. Second operand 9 states and 203 transitions. [2024-06-27 23:01:22,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 127 transitions, 1239 flow [2024-06-27 23:01:22,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 127 transitions, 1191 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:22,684 INFO L231 Difference]: Finished difference. Result has 140 places, 89 transitions, 865 flow [2024-06-27 23:01:22,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=865, PETRI_PLACES=140, PETRI_TRANSITIONS=89} [2024-06-27 23:01:22,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 23:01:22,685 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 89 transitions, 865 flow [2024-06-27 23:01:22,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:22,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:22,686 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, 1, 1, 1] [2024-06-27 23:01:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:01:22,686 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)] === [2024-06-27 23:01:22,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1466520403, now seen corresponding path program 15 times [2024-06-27 23:01:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:22,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114683303] [2024-06-27 23:01:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:22,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114683303] [2024-06-27 23:01:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114683303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:22,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:22,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470849540] [2024-06-27 23:01:22,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:22,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:22,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:22,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:22,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 89 transitions, 865 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:22,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:22,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:22,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:23,095 INFO L124 PetriNetUnfolderBase]: 890/1671 cut-off events. [2024-06-27 23:01:23,095 INFO L125 PetriNetUnfolderBase]: For 12829/12835 co-relation queries the response was YES. [2024-06-27 23:01:23,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6602 conditions, 1671 events. 890/1671 cut-off events. For 12829/12835 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9831 event pairs, 241 based on Foata normal form. 22/1686 useless extension candidates. Maximal degree in co-relation 6558. Up to 632 conditions per place. [2024-06-27 23:01:23,105 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 84 selfloop transitions, 25 changer transitions 8/125 dead transitions. [2024-06-27 23:01:23,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 125 transitions, 1277 flow [2024-06-27 23:01:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 23:01:23,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-27 23:01:23,107 INFO L175 Difference]: Start difference. First operand has 140 places, 89 transitions, 865 flow. Second operand 9 states and 203 transitions. [2024-06-27 23:01:23,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 125 transitions, 1277 flow [2024-06-27 23:01:23,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 125 transitions, 1210 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:23,125 INFO L231 Difference]: Finished difference. Result has 140 places, 88 transitions, 850 flow [2024-06-27 23:01:23,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=850, PETRI_PLACES=140, PETRI_TRANSITIONS=88} [2024-06-27 23:01:23,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 23:01:23,126 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 88 transitions, 850 flow [2024-06-27 23:01:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:23,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:23,126 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, 1, 1, 1] [2024-06-27 23:01:23,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:01:23,126 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)] === [2024-06-27 23:01:23,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1516261971, now seen corresponding path program 16 times [2024-06-27 23:01:23,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:23,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811483615] [2024-06-27 23:01:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:23,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811483615] [2024-06-27 23:01:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811483615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250825384] [2024-06-27 23:01:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:23,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:23,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:23,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:23,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 88 transitions, 850 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:23,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:23,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:23,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:23,454 INFO L124 PetriNetUnfolderBase]: 785/1484 cut-off events. [2024-06-27 23:01:23,454 INFO L125 PetriNetUnfolderBase]: For 10665/10671 co-relation queries the response was YES. [2024-06-27 23:01:23,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5854 conditions, 1484 events. 785/1484 cut-off events. For 10665/10671 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8495 event pairs, 229 based on Foata normal form. 22/1499 useless extension candidates. Maximal degree in co-relation 5810. Up to 632 conditions per place. [2024-06-27 23:01:23,463 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 69 selfloop transitions, 22 changer transitions 19/118 dead transitions. [2024-06-27 23:01:23,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 118 transitions, 1192 flow [2024-06-27 23:01:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 23:01:23,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-27 23:01:23,465 INFO L175 Difference]: Start difference. First operand has 140 places, 88 transitions, 850 flow. Second operand 9 states and 197 transitions. [2024-06-27 23:01:23,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 118 transitions, 1192 flow [2024-06-27 23:01:23,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 118 transitions, 1136 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:23,478 INFO L231 Difference]: Finished difference. Result has 140 places, 84 transitions, 804 flow [2024-06-27 23:01:23,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=804, PETRI_PLACES=140, PETRI_TRANSITIONS=84} [2024-06-27 23:01:23,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 23:01:23,479 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 84 transitions, 804 flow [2024-06-27 23:01:23,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:23,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:23,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:23,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:01:23,480 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)] === [2024-06-27 23:01:23,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1394517745, now seen corresponding path program 17 times [2024-06-27 23:01:23,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:23,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894469291] [2024-06-27 23:01:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:23,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894469291] [2024-06-27 23:01:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894469291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:23,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900815550] [2024-06-27 23:01:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:23,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:23,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 84 transitions, 804 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:23,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:23,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:23,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:23,838 INFO L124 PetriNetUnfolderBase]: 744/1399 cut-off events. [2024-06-27 23:01:23,839 INFO L125 PetriNetUnfolderBase]: For 10405/10411 co-relation queries the response was YES. [2024-06-27 23:01:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5537 conditions, 1399 events. 744/1399 cut-off events. For 10405/10411 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7898 event pairs, 253 based on Foata normal form. 22/1418 useless extension candidates. Maximal degree in co-relation 5494. Up to 949 conditions per place. [2024-06-27 23:01:23,846 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 19 changer transitions 17/112 dead transitions. [2024-06-27 23:01:23,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 112 transitions, 1102 flow [2024-06-27 23:01:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 23:01:23,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-27 23:01:23,849 INFO L175 Difference]: Start difference. First operand has 140 places, 84 transitions, 804 flow. Second operand 9 states and 198 transitions. [2024-06-27 23:01:23,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 112 transitions, 1102 flow [2024-06-27 23:01:23,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 112 transitions, 1043 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:23,862 INFO L231 Difference]: Finished difference. Result has 134 places, 81 transitions, 755 flow [2024-06-27 23:01:23,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=755, PETRI_PLACES=134, PETRI_TRANSITIONS=81} [2024-06-27 23:01:23,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 23:01:23,862 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 81 transitions, 755 flow [2024-06-27 23:01:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:23,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:23,863 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, 1, 1, 1] [2024-06-27 23:01:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:01:23,863 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)] === [2024-06-27 23:01:23,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 966421075, now seen corresponding path program 18 times [2024-06-27 23:01:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156441181] [2024-06-27 23:01:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:23,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:23,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156441181] [2024-06-27 23:01:23,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156441181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:23,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:23,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961301040] [2024-06-27 23:01:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:23,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:24,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:24,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 81 transitions, 755 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:24,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:24,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:24,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:24,180 INFO L124 PetriNetUnfolderBase]: 801/1482 cut-off events. [2024-06-27 23:01:24,181 INFO L125 PetriNetUnfolderBase]: For 11357/11371 co-relation queries the response was YES. [2024-06-27 23:01:24,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5919 conditions, 1482 events. 801/1482 cut-off events. For 11357/11371 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8408 event pairs, 374 based on Foata normal form. 22/1493 useless extension candidates. Maximal degree in co-relation 5878. Up to 951 conditions per place. [2024-06-27 23:01:24,188 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 74 selfloop transitions, 19 changer transitions 8/109 dead transitions. [2024-06-27 23:01:24,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 109 transitions, 1077 flow [2024-06-27 23:01:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 23:01:24,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-27 23:01:24,189 INFO L175 Difference]: Start difference. First operand has 134 places, 81 transitions, 755 flow. Second operand 9 states and 193 transitions. [2024-06-27 23:01:24,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 109 transitions, 1077 flow [2024-06-27 23:01:24,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 109 transitions, 1035 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:24,201 INFO L231 Difference]: Finished difference. Result has 133 places, 80 transitions, 748 flow [2024-06-27 23:01:24,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=748, PETRI_PLACES=133, PETRI_TRANSITIONS=80} [2024-06-27 23:01:24,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 23:01:24,202 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 80 transitions, 748 flow [2024-06-27 23:01:24,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:24,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:24,202 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, 1, 1, 1] [2024-06-27 23:01:24,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:01:24,202 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)] === [2024-06-27 23:01:24,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash 966035125, now seen corresponding path program 19 times [2024-06-27 23:01:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:24,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285737473] [2024-06-27 23:01:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:24,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:24,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285737473] [2024-06-27 23:01:24,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285737473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:24,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:24,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:24,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176525818] [2024-06-27 23:01:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:24,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:24,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:24,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:24,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:24,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:24,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 80 transitions, 748 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:24,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:24,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:24,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:24,469 INFO L124 PetriNetUnfolderBase]: 696/1303 cut-off events. [2024-06-27 23:01:24,469 INFO L125 PetriNetUnfolderBase]: For 9511/9517 co-relation queries the response was YES. [2024-06-27 23:01:24,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 1303 events. 696/1303 cut-off events. For 9511/9517 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7212 event pairs, 334 based on Foata normal form. 22/1314 useless extension candidates. Maximal degree in co-relation 5130. Up to 951 conditions per place. [2024-06-27 23:01:24,476 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 15 changer transitions 22/102 dead transitions. [2024-06-27 23:01:24,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 102 transitions, 1002 flow [2024-06-27 23:01:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:01:24,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-27 23:01:24,477 INFO L175 Difference]: Start difference. First operand has 133 places, 80 transitions, 748 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:01:24,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 102 transitions, 1002 flow [2024-06-27 23:01:24,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 102 transitions, 965 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:24,489 INFO L231 Difference]: Finished difference. Result has 134 places, 75 transitions, 687 flow [2024-06-27 23:01:24,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=687, PETRI_PLACES=134, PETRI_TRANSITIONS=75} [2024-06-27 23:01:24,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 23:01:24,489 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 75 transitions, 687 flow [2024-06-27 23:01:24,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:24,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:24,490 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, 1, 1, 1] [2024-06-27 23:01:24,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:01:24,490 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)] === [2024-06-27 23:01:24,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash 376573681, now seen corresponding path program 20 times [2024-06-27 23:01:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:24,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159476841] [2024-06-27 23:01:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:24,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:24,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:24,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159476841] [2024-06-27 23:01:24,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159476841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:24,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:24,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:24,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033444] [2024-06-27 23:01:24,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:24,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:24,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:24,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:24,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 75 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:24,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:24,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:24,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:24,800 INFO L124 PetriNetUnfolderBase]: 656/1225 cut-off events. [2024-06-27 23:01:24,800 INFO L125 PetriNetUnfolderBase]: For 9231/9237 co-relation queries the response was YES. [2024-06-27 23:01:24,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 1225 events. 656/1225 cut-off events. For 9231/9237 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6703 event pairs, 269 based on Foata normal form. 22/1234 useless extension candidates. Maximal degree in co-relation 4816. Up to 889 conditions per place. [2024-06-27 23:01:24,806 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 58 selfloop transitions, 14 changer transitions 17/97 dead transitions. [2024-06-27 23:01:24,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 97 transitions, 935 flow [2024-06-27 23:01:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 23:01:24,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-27 23:01:24,808 INFO L175 Difference]: Start difference. First operand has 134 places, 75 transitions, 687 flow. Second operand 9 states and 192 transitions. [2024-06-27 23:01:24,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 97 transitions, 935 flow [2024-06-27 23:01:24,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 97 transitions, 861 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 23:01:24,817 INFO L231 Difference]: Finished difference. Result has 123 places, 72 transitions, 609 flow [2024-06-27 23:01:24,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=609, PETRI_PLACES=123, PETRI_TRANSITIONS=72} [2024-06-27 23:01:24,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-27 23:01:24,818 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 72 transitions, 609 flow [2024-06-27 23:01:24,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:24,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:24,818 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, 1, 1, 1] [2024-06-27 23:01:24,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:01:24,818 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)] === [2024-06-27 23:01:24,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:24,819 INFO L85 PathProgramCache]: Analyzing trace with hash 726778737, now seen corresponding path program 21 times [2024-06-27 23:01:24,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:24,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022317280] [2024-06-27 23:01:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:24,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:24,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022317280] [2024-06-27 23:01:24,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022317280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:24,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:24,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:24,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778052817] [2024-06-27 23:01:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:24,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:24,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:25,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:25,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 72 transitions, 609 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:25,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:25,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:25,169 INFO L124 PetriNetUnfolderBase]: 814/1503 cut-off events. [2024-06-27 23:01:25,169 INFO L125 PetriNetUnfolderBase]: For 11509/11515 co-relation queries the response was YES. [2024-06-27 23:01:25,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5928 conditions, 1503 events. 814/1503 cut-off events. For 11509/11515 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8732 event pairs, 399 based on Foata normal form. 22/1516 useless extension candidates. Maximal degree in co-relation 5890. Up to 766 conditions per place. [2024-06-27 23:01:25,177 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 18 changer transitions 8/104 dead transitions. [2024-06-27 23:01:25,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 104 transitions, 967 flow [2024-06-27 23:01:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 23:01:25,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-27 23:01:25,178 INFO L175 Difference]: Start difference. First operand has 123 places, 72 transitions, 609 flow. Second operand 9 states and 199 transitions. [2024-06-27 23:01:25,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 104 transitions, 967 flow [2024-06-27 23:01:25,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 104 transitions, 929 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:25,190 INFO L231 Difference]: Finished difference. Result has 120 places, 71 transitions, 604 flow [2024-06-27 23:01:25,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=604, PETRI_PLACES=120, PETRI_TRANSITIONS=71} [2024-06-27 23:01:25,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-27 23:01:25,190 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 604 flow [2024-06-27 23:01:25,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:25,191 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, 1, 1, 1] [2024-06-27 23:01:25,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:01:25,191 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)] === [2024-06-27 23:01:25,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1692635633, now seen corresponding path program 22 times [2024-06-27 23:01:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:25,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783964510] [2024-06-27 23:01:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:25,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:25,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:25,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783964510] [2024-06-27 23:01:25,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783964510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:25,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:25,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820688267] [2024-06-27 23:01:25,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:25,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:25,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:25,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:25,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 71 transitions, 604 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:25,518 INFO L124 PetriNetUnfolderBase]: 790/1461 cut-off events. [2024-06-27 23:01:25,519 INFO L125 PetriNetUnfolderBase]: For 11443/11449 co-relation queries the response was YES. [2024-06-27 23:01:25,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5789 conditions, 1461 events. 790/1461 cut-off events. For 11443/11449 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8460 event pairs, 401 based on Foata normal form. 22/1472 useless extension candidates. Maximal degree in co-relation 5752. Up to 951 conditions per place. [2024-06-27 23:01:25,525 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 18 changer transitions 8/96 dead transitions. [2024-06-27 23:01:25,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 96 transitions, 891 flow [2024-06-27 23:01:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:01:25,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-27 23:01:25,526 INFO L175 Difference]: Start difference. First operand has 120 places, 71 transitions, 604 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:01:25,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 96 transitions, 891 flow [2024-06-27 23:01:25,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 96 transitions, 852 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:25,536 INFO L231 Difference]: Finished difference. Result has 121 places, 70 transitions, 597 flow [2024-06-27 23:01:25,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=597, PETRI_PLACES=121, PETRI_TRANSITIONS=70} [2024-06-27 23:01:25,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-27 23:01:25,537 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 70 transitions, 597 flow [2024-06-27 23:01:25,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:25,537 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, 1, 1, 1] [2024-06-27 23:01:25,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:01:25,537 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)] === [2024-06-27 23:01:25,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash -51908939, now seen corresponding path program 23 times [2024-06-27 23:01:25,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:25,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917328707] [2024-06-27 23:01:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:25,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:25,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:25,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917328707] [2024-06-27 23:01:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917328707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:25,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:25,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:25,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258181857] [2024-06-27 23:01:25,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:25,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:25,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 70 transitions, 597 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:25,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:25,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:25,844 INFO L124 PetriNetUnfolderBase]: 685/1276 cut-off events. [2024-06-27 23:01:25,845 INFO L125 PetriNetUnfolderBase]: For 9749/9755 co-relation queries the response was YES. [2024-06-27 23:01:25,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5053 conditions, 1276 events. 685/1276 cut-off events. For 9749/9755 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7145 event pairs, 381 based on Foata normal form. 22/1289 useless extension candidates. Maximal degree in co-relation 5016. Up to 766 conditions per place. [2024-06-27 23:01:25,850 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 56 selfloop transitions, 15 changer transitions 16/95 dead transitions. [2024-06-27 23:01:25,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 95 transitions, 879 flow [2024-06-27 23:01:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 23:01:25,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-27 23:01:25,851 INFO L175 Difference]: Start difference. First operand has 121 places, 70 transitions, 597 flow. Second operand 9 states and 193 transitions. [2024-06-27 23:01:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 95 transitions, 879 flow [2024-06-27 23:01:25,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 95 transitions, 840 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:25,861 INFO L231 Difference]: Finished difference. Result has 122 places, 66 transitions, 547 flow [2024-06-27 23:01:25,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=547, PETRI_PLACES=122, PETRI_TRANSITIONS=66} [2024-06-27 23:01:25,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 23:01:25,861 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 66 transitions, 547 flow [2024-06-27 23:01:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:25,861 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, 1, 1, 1] [2024-06-27 23:01:25,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:01:25,862 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)] === [2024-06-27 23:01:25,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash -73976159, now seen corresponding path program 24 times [2024-06-27 23:01:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392046898] [2024-06-27 23:01:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:25,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:26,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:26,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392046898] [2024-06-27 23:01:26,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392046898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:26,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:26,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953667541] [2024-06-27 23:01:26,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:26,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:26,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 66 transitions, 547 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:26,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:26,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:26,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:26,223 INFO L124 PetriNetUnfolderBase]: 574/1075 cut-off events. [2024-06-27 23:01:26,224 INFO L125 PetriNetUnfolderBase]: For 7901/7915 co-relation queries the response was YES. [2024-06-27 23:01:26,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4193 conditions, 1075 events. 574/1075 cut-off events. For 7901/7915 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5755 event pairs, 300 based on Foata normal form. 22/1088 useless extension candidates. Maximal degree in co-relation 4156. Up to 766 conditions per place. [2024-06-27 23:01:26,229 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 12 changer transitions 23/85 dead transitions. [2024-06-27 23:01:26,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 85 transitions, 759 flow [2024-06-27 23:01:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 23:01:26,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-27 23:01:26,230 INFO L175 Difference]: Start difference. First operand has 122 places, 66 transitions, 547 flow. Second operand 9 states and 184 transitions. [2024-06-27 23:01:26,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 85 transitions, 759 flow [2024-06-27 23:01:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 85 transitions, 718 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:26,237 INFO L231 Difference]: Finished difference. Result has 116 places, 60 transitions, 466 flow [2024-06-27 23:01:26,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=466, PETRI_PLACES=116, PETRI_TRANSITIONS=60} [2024-06-27 23:01:26,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 23:01:26,238 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 60 transitions, 466 flow [2024-06-27 23:01:26,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:26,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:26,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:26,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:01:26,238 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)] === [2024-06-27 23:01:26,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -318199601, now seen corresponding path program 25 times [2024-06-27 23:01:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:26,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658961612] [2024-06-27 23:01:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:26,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658961612] [2024-06-27 23:01:26,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658961612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:26,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:26,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:26,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637615514] [2024-06-27 23:01:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:26,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:26,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:26,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 60 transitions, 466 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:26,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:26,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:26,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:26,552 INFO L124 PetriNetUnfolderBase]: 542/1007 cut-off events. [2024-06-27 23:01:26,552 INFO L125 PetriNetUnfolderBase]: For 7650/7650 co-relation queries the response was YES. [2024-06-27 23:01:26,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 1007 events. 542/1007 cut-off events. For 7650/7650 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5303 event pairs, 231 based on Foata normal form. 18/1014 useless extension candidates. Maximal degree in co-relation 3847. Up to 507 conditions per place. [2024-06-27 23:01:26,557 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 48 selfloop transitions, 16 changer transitions 9/81 dead transitions. [2024-06-27 23:01:26,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 81 transitions, 715 flow [2024-06-27 23:01:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 23:01:26,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-27 23:01:26,558 INFO L175 Difference]: Start difference. First operand has 116 places, 60 transitions, 466 flow. Second operand 8 states and 169 transitions. [2024-06-27 23:01:26,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 81 transitions, 715 flow [2024-06-27 23:01:26,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 81 transitions, 661 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:26,565 INFO L231 Difference]: Finished difference. Result has 104 places, 58 transitions, 436 flow [2024-06-27 23:01:26,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=436, PETRI_PLACES=104, PETRI_TRANSITIONS=58} [2024-06-27 23:01:26,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-27 23:01:26,565 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 58 transitions, 436 flow [2024-06-27 23:01:26,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:26,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:26,566 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, 1, 1, 1] [2024-06-27 23:01:26,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:01:26,566 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)] === [2024-06-27 23:01:26,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1516456045, now seen corresponding path program 26 times [2024-06-27 23:01:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317189442] [2024-06-27 23:01:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:26,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:26,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317189442] [2024-06-27 23:01:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317189442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:26,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:26,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704871383] [2024-06-27 23:01:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:26,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:26,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 58 transitions, 436 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:26,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:26,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:26,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:26,863 INFO L124 PetriNetUnfolderBase]: 433/818 cut-off events. [2024-06-27 23:01:26,863 INFO L125 PetriNetUnfolderBase]: For 5970/5970 co-relation queries the response was YES. [2024-06-27 23:01:26,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3098 conditions, 818 events. 433/818 cut-off events. For 5970/5970 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4098 event pairs, 207 based on Foata normal form. 18/825 useless extension candidates. Maximal degree in co-relation 3066. Up to 507 conditions per place. [2024-06-27 23:01:26,867 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 10 changer transitions 21/73 dead transitions. [2024-06-27 23:01:26,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 73 transitions, 614 flow [2024-06-27 23:01:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:01:26,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-27 23:01:26,868 INFO L175 Difference]: Start difference. First operand has 104 places, 58 transitions, 436 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:01:26,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 73 transitions, 614 flow [2024-06-27 23:01:26,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 73 transitions, 578 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:26,873 INFO L231 Difference]: Finished difference. Result has 104 places, 50 transitions, 335 flow [2024-06-27 23:01:26,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=335, PETRI_PLACES=104, PETRI_TRANSITIONS=50} [2024-06-27 23:01:26,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-27 23:01:26,873 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 50 transitions, 335 flow [2024-06-27 23:01:26,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:26,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:26,874 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, 1, 1, 1] [2024-06-27 23:01:26,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:01:26,874 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)] === [2024-06-27 23:01:26,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1049268745, now seen corresponding path program 27 times [2024-06-27 23:01:26,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:26,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071294685] [2024-06-27 23:01:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:26,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:27,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071294685] [2024-06-27 23:01:27,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071294685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:27,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:27,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:27,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517512269] [2024-06-27 23:01:27,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:27,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:27,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:27,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:27,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:27,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 50 transitions, 335 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:27,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:27,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:27,213 INFO L124 PetriNetUnfolderBase]: 379/722 cut-off events. [2024-06-27 23:01:27,214 INFO L125 PetriNetUnfolderBase]: For 5584/5584 co-relation queries the response was YES. [2024-06-27 23:01:27,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 722 events. 379/722 cut-off events. For 5584/5584 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3508 event pairs, 142 based on Foata normal form. 18/735 useless extension candidates. Maximal degree in co-relation 2636. Up to 451 conditions per place. [2024-06-27 23:01:27,217 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 8 changer transitions 17/68 dead transitions. [2024-06-27 23:01:27,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 68 transitions, 515 flow [2024-06-27 23:01:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:01:27,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 23:01:27,218 INFO L175 Difference]: Start difference. First operand has 104 places, 50 transitions, 335 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:01:27,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 68 transitions, 515 flow [2024-06-27 23:01:27,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 68 transitions, 487 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:27,222 INFO L231 Difference]: Finished difference. Result has 93 places, 47 transitions, 306 flow [2024-06-27 23:01:27,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=93, PETRI_TRANSITIONS=47} [2024-06-27 23:01:27,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-27 23:01:27,223 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 47 transitions, 306 flow [2024-06-27 23:01:27,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:27,223 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, 1, 1, 1] [2024-06-27 23:01:27,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:01:27,224 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)] === [2024-06-27 23:01:27,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash 916863517, now seen corresponding path program 28 times [2024-06-27 23:01:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187751894] [2024-06-27 23:01:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:27,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187751894] [2024-06-27 23:01:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187751894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:27,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:27,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76692232] [2024-06-27 23:01:27,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:27,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:27,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 47 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:27,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:27,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:27,509 INFO L124 PetriNetUnfolderBase]: 335/640 cut-off events. [2024-06-27 23:01:27,509 INFO L125 PetriNetUnfolderBase]: For 4747/4747 co-relation queries the response was YES. [2024-06-27 23:01:27,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 640 events. 335/640 cut-off events. For 4747/4747 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3011 event pairs, 116 based on Foata normal form. 18/651 useless extension candidates. Maximal degree in co-relation 2334. Up to 224 conditions per place. [2024-06-27 23:01:27,512 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 40 selfloop transitions, 11 changer transitions 8/67 dead transitions. [2024-06-27 23:01:27,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 67 transitions, 518 flow [2024-06-27 23:01:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 23:01:27,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-27 23:01:27,513 INFO L175 Difference]: Start difference. First operand has 93 places, 47 transitions, 306 flow. Second operand 8 states and 170 transitions. [2024-06-27 23:01:27,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 67 transitions, 518 flow [2024-06-27 23:01:27,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 67 transitions, 494 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:27,516 INFO L231 Difference]: Finished difference. Result has 90 places, 45 transitions, 298 flow [2024-06-27 23:01:27,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=90, PETRI_TRANSITIONS=45} [2024-06-27 23:01:27,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-27 23:01:27,517 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 45 transitions, 298 flow [2024-06-27 23:01:27,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:27,517 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, 1, 1, 1] [2024-06-27 23:01:27,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:01:27,517 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)] === [2024-06-27 23:01:27,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -381714507, now seen corresponding path program 29 times [2024-06-27 23:01:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624137545] [2024-06-27 23:01:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:27,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624137545] [2024-06-27 23:01:27,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624137545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:27,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:27,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638649067] [2024-06-27 23:01:27,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:27,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:27,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:27,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:27,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 45 transitions, 298 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:27,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:27,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:27,728 INFO L124 PetriNetUnfolderBase]: 311/598 cut-off events. [2024-06-27 23:01:27,729 INFO L125 PetriNetUnfolderBase]: For 4156/4164 co-relation queries the response was YES. [2024-06-27 23:01:27,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 598 events. 311/598 cut-off events. For 4156/4164 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2723 event pairs, 132 based on Foata normal form. 18/613 useless extension candidates. Maximal degree in co-relation 2186. Up to 187 conditions per place. [2024-06-27 23:01:27,732 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 36 selfloop transitions, 12 changer transitions 8/64 dead transitions. [2024-06-27 23:01:27,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 64 transitions, 500 flow [2024-06-27 23:01:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 23:01:27,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-27 23:01:27,733 INFO L175 Difference]: Start difference. First operand has 90 places, 45 transitions, 298 flow. Second operand 8 states and 166 transitions. [2024-06-27 23:01:27,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 64 transitions, 500 flow [2024-06-27 23:01:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 64 transitions, 471 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:27,736 INFO L231 Difference]: Finished difference. Result has 89 places, 43 transitions, 287 flow [2024-06-27 23:01:27,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=287, PETRI_PLACES=89, PETRI_TRANSITIONS=43} [2024-06-27 23:01:27,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 23:01:27,737 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 43 transitions, 287 flow [2024-06-27 23:01:27,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:27,737 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, 1, 1, 1] [2024-06-27 23:01:27,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:01:27,737 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)] === [2024-06-27 23:01:27,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1266188325, now seen corresponding path program 30 times [2024-06-27 23:01:27,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:27,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539527018] [2024-06-27 23:01:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:27,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:27,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539527018] [2024-06-27 23:01:27,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539527018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:27,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:27,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:27,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134165808] [2024-06-27 23:01:27,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:27,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:27,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:27,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:27,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:27,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:27,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 43 transitions, 287 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:27,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:27,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:27,929 INFO L124 PetriNetUnfolderBase]: 206/411 cut-off events. [2024-06-27 23:01:27,930 INFO L125 PetriNetUnfolderBase]: For 2491/2499 co-relation queries the response was YES. [2024-06-27 23:01:27,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 411 events. 206/411 cut-off events. For 2491/2499 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1647 event pairs, 108 based on Foata normal form. 18/426 useless extension candidates. Maximal degree in co-relation 1462. Up to 187 conditions per place. [2024-06-27 23:01:27,931 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 24 selfloop transitions, 6 changer transitions 19/57 dead transitions. [2024-06-27 23:01:27,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 57 transitions, 431 flow [2024-06-27 23:01:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:01:27,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 23:01:27,932 INFO L175 Difference]: Start difference. First operand has 89 places, 43 transitions, 287 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:01:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 57 transitions, 431 flow [2024-06-27 23:01:27,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 57 transitions, 404 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:27,934 INFO L231 Difference]: Finished difference. Result has 88 places, 36 transitions, 215 flow [2024-06-27 23:01:27,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=88, PETRI_TRANSITIONS=36} [2024-06-27 23:01:27,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-27 23:01:27,935 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 36 transitions, 215 flow [2024-06-27 23:01:27,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:27,935 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, 1, 1, 1] [2024-06-27 23:01:27,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:01:27,935 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)] === [2024-06-27 23:01:27,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash 917249467, now seen corresponding path program 31 times [2024-06-27 23:01:27,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:27,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555998637] [2024-06-27 23:01:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:27,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:28,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:28,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555998637] [2024-06-27 23:01:28,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555998637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:28,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:28,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:28,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571964499] [2024-06-27 23:01:28,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:28,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:28,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:28,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 23:01:28,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 36 transitions, 215 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:28,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:28,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 23:01:28,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:28,162 INFO L124 PetriNetUnfolderBase]: 91/206 cut-off events. [2024-06-27 23:01:28,162 INFO L125 PetriNetUnfolderBase]: For 1079/1079 co-relation queries the response was YES. [2024-06-27 23:01:28,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 206 events. 91/206 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 637 event pairs, 7 based on Foata normal form. 18/221 useless extension candidates. Maximal degree in co-relation 652. Up to 96 conditions per place. [2024-06-27 23:01:28,163 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2024-06-27 23:01:28,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 44 transitions, 291 flow [2024-06-27 23:01:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:01:28,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 23:01:28,164 INFO L175 Difference]: Start difference. First operand has 88 places, 36 transitions, 215 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:01:28,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 44 transitions, 291 flow [2024-06-27 23:01:28,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 44 transitions, 247 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 23:01:28,165 INFO L231 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2024-06-27 23:01:28,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2024-06-27 23:01:28,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-27 23:01:28,166 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2024-06-27 23:01:28,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:28,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-27 23:01:28,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-27 23:01:28,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-27 23:01:28,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-27 23:01:28,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-27 23:01:28,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-27 23:01:28,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:01:28,170 INFO L445 BasicCegarLoop]: Path program histogram: [31, 17, 8, 6, 6, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:28,172 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 23:01:28,172 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 23:01:28,176 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-27 23:01:28,176 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-27 23:01:28,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 11:01:28 BasicIcfg [2024-06-27 23:01:28,177 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 23:01:28,177 INFO L158 Benchmark]: Toolchain (without parser) took 40204.61ms. Allocated memory was 190.8MB in the beginning and 1.1GB in the end (delta: 899.7MB). Free memory was 114.3MB in the beginning and 414.5MB in the end (delta: -300.3MB). Peak memory consumption was 601.8MB. Max. memory is 16.1GB. [2024-06-27 23:01:28,177 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 190.8MB. Free memory is still 150.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:01:28,177 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 190.8MB. Free memory was 162.6MB in the beginning and 162.3MB in the end (delta: 251.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:01:28,177 INFO L158 Benchmark]: CACSL2BoogieTranslator took 519.75ms. Allocated memory is still 190.8MB. Free memory was 114.0MB in the beginning and 156.8MB in the end (delta: -42.8MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2024-06-27 23:01:28,178 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.26ms. Allocated memory is still 190.8MB. Free memory was 156.8MB in the beginning and 154.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 23:01:28,178 INFO L158 Benchmark]: Boogie Preprocessor took 32.77ms. Allocated memory is still 190.8MB. Free memory was 154.7MB in the beginning and 152.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 23:01:28,178 INFO L158 Benchmark]: RCFGBuilder took 420.53ms. Allocated memory is still 190.8MB. Free memory was 152.6MB in the beginning and 127.5MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-27 23:01:28,178 INFO L158 Benchmark]: TraceAbstraction took 39193.96ms. Allocated memory was 190.8MB in the beginning and 1.1GB in the end (delta: 899.7MB). Free memory was 127.5MB in the beginning and 414.5MB in the end (delta: -287.0MB). Peak memory consumption was 613.5MB. Max. memory is 16.1GB. [2024-06-27 23:01:28,179 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 190.8MB. Free memory is still 150.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 190.8MB. Free memory was 162.6MB in the beginning and 162.3MB in the end (delta: 251.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 519.75ms. Allocated memory is still 190.8MB. Free memory was 114.0MB in the beginning and 156.8MB in the end (delta: -42.8MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.26ms. Allocated memory is still 190.8MB. Free memory was 156.8MB in the beginning and 154.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.77ms. Allocated memory is still 190.8MB. Free memory was 154.7MB in the beginning and 152.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 420.53ms. Allocated memory is still 190.8MB. Free memory was 152.6MB in the beginning and 127.5MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 39193.96ms. Allocated memory was 190.8MB in the beginning and 1.1GB in the end (delta: 899.7MB). Free memory was 127.5MB in the beginning and 414.5MB in the end (delta: -287.0MB). Peak memory consumption was 613.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 783]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 785]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 786]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 67 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 39.1s, OverallIterations: 97, TraceHistogramMax: 1, PathProgramHistogramMax: 31, EmptinessCheckTime: 0.0s, AutomataDifference: 26.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6764 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5206 mSDsluCounter, 1053 SdHoareTripleChecker+Invalid, 9.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 591 mSDsCounter, 1470 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23653 IncrementalHoareTripleChecker+Invalid, 25123 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1470 mSolverCounterUnsat, 462 mSDtfsCounter, 23653 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 678 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1602occurred in iteration=64, InterpolantAutomatonStates: 709, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 1905 NumberOfCodeBlocks, 1905 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1808 ConstructedInterpolants, 0 QuantifiedInterpolants, 18481 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 97 InterpolantComputations, 97 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 23:01:28,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE