./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_power.oepc.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/safe027_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:34:25,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:34:25,915 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:34:25,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:34:25,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:34:25,952 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:34:25,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:34:25,953 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:34:25,953 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:34:25,956 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:34:25,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:34:25,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:34:25,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:34:25,959 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:34:25,959 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:34:25,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:34:25,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:34:25,960 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:34:25,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:34:25,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:34:25,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:34:25,961 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:34:25,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:34:25,961 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:34:25,961 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:34:25,962 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:34:25,962 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:34:25,962 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:34:25,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:34:25,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:34:25,964 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:34:25,964 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:34:25,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:34:25,964 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:34:25,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:34:25,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:34:25,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:34:25,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:34:25,965 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:34:25,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:34:25,966 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:34:25,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:34:25,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:34:25,966 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:34:26,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:34:26,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:34:26,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:34:26,225 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:34:26,226 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:34:26,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_power.oepc.yml/witness.yml [2024-06-28 00:34:26,319 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:34:26,320 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:34:26,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-28 00:34:27,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:34:27,547 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:34:27,547 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-28 00:34:27,563 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef9688c2/fbb33cbf8ae2496f97eae126a9ab35ab/FLAG0b2b38af8 [2024-06-28 00:34:27,573 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef9688c2/fbb33cbf8ae2496f97eae126a9ab35ab [2024-06-28 00:34:27,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:34:27,574 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:34:27,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:34:27,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:34:27,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:34:27,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:34:26" (1/2) ... [2024-06-28 00:34:27,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c489b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:34:27, skipping insertion in model container [2024-06-28 00:34:27,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:34:26" (1/2) ... [2024-06-28 00:34:27,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53acd0cf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:34:27, skipping insertion in model container [2024-06-28 00:34:27,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:34:27" (2/2) ... [2024-06-28 00:34:27,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c489b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:27, skipping insertion in model container [2024-06-28 00:34:27,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:34:27" (2/2) ... [2024-06-28 00:34:27,598 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:34:27,631 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:34:27,633 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-28 00:34:27,633 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-28 00:34:27,633 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-28 00:34:27,633 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-28 00:34:27,633 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:34:27,633 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-28 00:34:27,671 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:34:27,966 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:34:27,975 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:34:28,063 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:34:28,093 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:34:28,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28 WrapperNode [2024-06-28 00:34:28,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:34:28,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:34:28,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:34:28,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:34:28,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,134 INFO L138 Inliner]: procedures = 176, calls = 77, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 174 [2024-06-28 00:34:28,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:34:28,135 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:34:28,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:34:28,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:34:28,143 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,149 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,162 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-28 00:34:28,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,171 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,175 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:34:28,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:34:28,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:34:28,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:34:28,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (1/1) ... [2024-06-28 00:34:28,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:34:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:34:28,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:34:28,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:34:28,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:34:28,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:34:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:34:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:34:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:34:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:34:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:34:28,243 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:34:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:34:28,244 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:34:28,244 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:34:28,244 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:34:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 00:34:28,245 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 00:34:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:34:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:34:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:34:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:34:28,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:34:28,248 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:34:28,392 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:34:28,393 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:34:28,781 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:34:28,781 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:34:29,089 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:34:29,089 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:34:29,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:34:29 BoogieIcfgContainer [2024-06-28 00:34:29,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:34:29,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:34:29,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:34:29,094 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:34:29,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:34:26" (1/4) ... [2024-06-28 00:34:29,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc6097a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:34:29, skipping insertion in model container [2024-06-28 00:34:29,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:34:27" (2/4) ... [2024-06-28 00:34:29,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc6097a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:34:29, skipping insertion in model container [2024-06-28 00:34:29,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:34:28" (3/4) ... [2024-06-28 00:34:29,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc6097a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:34:29, skipping insertion in model container [2024-06-28 00:34:29,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:34:29" (4/4) ... [2024-06-28 00:34:29,098 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2024-06-28 00:34:29,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:34:29,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:34:29,112 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:34:29,161 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:34:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 00:34:29,217 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-28 00:34:29,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:34:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:34:29,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 00:34:29,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-28 00:34:29,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:34:29,241 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;@7af177ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:34:29,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 00:34:29,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:34:29,246 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 00:34:29,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:34:29,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:29,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:34:29,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:29,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash 723214095, now seen corresponding path program 1 times [2024-06-28 00:34:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893894394] [2024-06-28 00:34:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:29,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:29,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893894394] [2024-06-28 00:34:29,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893894394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:29,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:29,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:34:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762694555] [2024-06-28 00:34:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:29,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:34:29,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:29,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:34:29,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:34:29,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:34:29,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 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) [2024-06-28 00:34:29,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:29,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:34:29,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:30,064 INFO L124 PetriNetUnfolderBase]: 1114/1900 cut-off events. [2024-06-28 00:34:30,065 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-28 00:34:30,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 1900 events. 1114/1900 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11314 event pairs, 656 based on Foata normal form. 1/1791 useless extension candidates. Maximal degree in co-relation 3603. Up to 1616 conditions per place. [2024-06-28 00:34:30,108 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 40 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-28 00:34:30,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 229 flow [2024-06-28 00:34:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:34:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:34:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-28 00:34:30,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-28 00:34:30,119 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 103 transitions. [2024-06-28 00:34:30,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 229 flow [2024-06-28 00:34:30,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:30,124 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-28 00:34:30,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 00:34:30,128 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-28 00:34:30,129 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-28 00:34:30,129 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) [2024-06-28 00:34:30,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:30,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:30,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:34:30,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:30,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:30,130 INFO L85 PathProgramCache]: Analyzing trace with hash -775742046, now seen corresponding path program 1 times [2024-06-28 00:34:30,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:30,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054777881] [2024-06-28 00:34:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:30,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:30,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054777881] [2024-06-28 00:34:30,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054777881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:30,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:30,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:34:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127926870] [2024-06-28 00:34:30,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:34:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:34:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:34:30,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:34:30,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:30,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:30,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:34:30,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:30,891 INFO L124 PetriNetUnfolderBase]: 1066/1785 cut-off events. [2024-06-28 00:34:30,891 INFO L125 PetriNetUnfolderBase]: For 374/383 co-relation queries the response was YES. [2024-06-28 00:34:30,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 1785 events. 1066/1785 cut-off events. For 374/383 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10694 event pairs, 438 based on Foata normal form. 22/1738 useless extension candidates. Maximal degree in co-relation 4106. Up to 1404 conditions per place. [2024-06-28 00:34:30,900 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 41 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-28 00:34:30,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 261 flow [2024-06-28 00:34:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:34:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:34:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-28 00:34:30,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-28 00:34:30,903 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 3 states and 100 transitions. [2024-06-28 00:34:30,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 261 flow [2024-06-28 00:34:30,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:30,908 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 155 flow [2024-06-28 00:34:30,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-28 00:34:30,909 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-06-28 00:34:30,910 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 155 flow [2024-06-28 00:34:30,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:30,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:30,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:30,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:34:30,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:30,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 217252820, now seen corresponding path program 1 times [2024-06-28 00:34:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:30,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577870532] [2024-06-28 00:34:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:31,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577870532] [2024-06-28 00:34:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577870532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:31,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:31,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:34:31,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292418179] [2024-06-28 00:34:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:31,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:34:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:34:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:34:31,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:31,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 155 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) [2024-06-28 00:34:31,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:31,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:31,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:31,448 INFO L124 PetriNetUnfolderBase]: 1988/3224 cut-off events. [2024-06-28 00:34:31,448 INFO L125 PetriNetUnfolderBase]: For 1298/1298 co-relation queries the response was YES. [2024-06-28 00:34:31,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7932 conditions, 3224 events. 1988/3224 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19351 event pairs, 1101 based on Foata normal form. 6/3174 useless extension candidates. Maximal degree in co-relation 7918. Up to 2787 conditions per place. [2024-06-28 00:34:31,464 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 57 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-28 00:34:31,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 373 flow [2024-06-28 00:34:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:34:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:34:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-28 00:34:31,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-28 00:34:31,465 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 155 flow. Second operand 4 states and 126 transitions. [2024-06-28 00:34:31,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 373 flow [2024-06-28 00:34:31,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:31,467 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 223 flow [2024-06-28 00:34:31,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-28 00:34:31,468 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2024-06-28 00:34:31,468 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 223 flow [2024-06-28 00:34:31,469 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) [2024-06-28 00:34:31,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:31,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:31,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:34:31,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:31,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1679118413, now seen corresponding path program 1 times [2024-06-28 00:34:31,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:31,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493209244] [2024-06-28 00:34:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:31,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:31,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493209244] [2024-06-28 00:34:31,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493209244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:31,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:31,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:31,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647061296] [2024-06-28 00:34:31,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:31,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:31,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:31,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:31,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:31,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 223 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) [2024-06-28 00:34:31,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:32,166 INFO L124 PetriNetUnfolderBase]: 1973/3218 cut-off events. [2024-06-28 00:34:32,166 INFO L125 PetriNetUnfolderBase]: For 2403/2403 co-relation queries the response was YES. [2024-06-28 00:34:32,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8528 conditions, 3218 events. 1973/3218 cut-off events. For 2403/2403 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19394 event pairs, 860 based on Foata normal form. 6/3169 useless extension candidates. Maximal degree in co-relation 8511. Up to 2681 conditions per place. [2024-06-28 00:34:32,183 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 59 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-28 00:34:32,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 455 flow [2024-06-28 00:34:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:34:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:34:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-28 00:34:32,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-28 00:34:32,185 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 223 flow. Second operand 4 states and 128 transitions. [2024-06-28 00:34:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 455 flow [2024-06-28 00:34:32,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 449 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 00:34:32,189 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 306 flow [2024-06-28 00:34:32,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-28 00:34:32,189 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-28 00:34:32,189 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 306 flow [2024-06-28 00:34:32,190 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) [2024-06-28 00:34:32,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:32,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:34:32,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:32,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -693912155, now seen corresponding path program 1 times [2024-06-28 00:34:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093824519] [2024-06-28 00:34:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:32,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:32,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093824519] [2024-06-28 00:34:32,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093824519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:32,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:32,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:32,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095707987] [2024-06-28 00:34:32,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:32,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:32,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:32,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:32,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:32,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-28 00:34:32,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 306 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) [2024-06-28 00:34:32,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:32,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-28 00:34:32,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:33,082 INFO L124 PetriNetUnfolderBase]: 2549/4196 cut-off events. [2024-06-28 00:34:33,082 INFO L125 PetriNetUnfolderBase]: For 5434/5442 co-relation queries the response was YES. [2024-06-28 00:34:33,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12228 conditions, 4196 events. 2549/4196 cut-off events. For 5434/5442 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26754 event pairs, 584 based on Foata normal form. 40/4196 useless extension candidates. Maximal degree in co-relation 12206. Up to 2873 conditions per place. [2024-06-28 00:34:33,111 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 106 selfloop transitions, 34 changer transitions 0/151 dead transitions. [2024-06-28 00:34:33,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 151 transitions, 923 flow [2024-06-28 00:34:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:34:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:34:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-28 00:34:33,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5817307692307693 [2024-06-28 00:34:33,116 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 306 flow. Second operand 8 states and 242 transitions. [2024-06-28 00:34:33,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 151 transitions, 923 flow [2024-06-28 00:34:33,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 151 transitions, 909 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-28 00:34:33,128 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 564 flow [2024-06-28 00:34:33,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=564, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-06-28 00:34:33,130 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-28 00:34:33,130 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 564 flow [2024-06-28 00:34:33,130 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) [2024-06-28 00:34:33,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:33,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:33,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:34:33,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:33,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash -513182129, now seen corresponding path program 2 times [2024-06-28 00:34:33,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:33,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316132249] [2024-06-28 00:34:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:33,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:33,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316132249] [2024-06-28 00:34:33,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316132249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:33,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:33,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009742562] [2024-06-28 00:34:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:33,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:33,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:33,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:33,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:33,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:33,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:34,031 INFO L124 PetriNetUnfolderBase]: 2961/4904 cut-off events. [2024-06-28 00:34:34,031 INFO L125 PetriNetUnfolderBase]: For 11937/11943 co-relation queries the response was YES. [2024-06-28 00:34:34,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16656 conditions, 4904 events. 2961/4904 cut-off events. For 11937/11943 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32175 event pairs, 500 based on Foata normal form. 61/4897 useless extension candidates. Maximal degree in co-relation 16628. Up to 3059 conditions per place. [2024-06-28 00:34:34,059 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 85 selfloop transitions, 28 changer transitions 0/125 dead transitions. [2024-06-28 00:34:34,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 125 transitions, 970 flow [2024-06-28 00:34:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:34:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:34:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-28 00:34:34,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 00:34:34,061 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 564 flow. Second operand 4 states and 130 transitions. [2024-06-28 00:34:34,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 125 transitions, 970 flow [2024-06-28 00:34:34,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 956 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:34,073 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 722 flow [2024-06-28 00:34:34,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=722, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-06-28 00:34:34,074 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-28 00:34:34,074 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 722 flow [2024-06-28 00:34:34,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:34,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:34,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:34,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:34:34,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:34,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash -208835377, now seen corresponding path program 3 times [2024-06-28 00:34:34,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:34,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293115221] [2024-06-28 00:34:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293115221] [2024-06-28 00:34:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293115221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:34,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:34,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883969930] [2024-06-28 00:34:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:34,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:34,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 722 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:34,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:34,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:34,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:35,136 INFO L124 PetriNetUnfolderBase]: 2937/4923 cut-off events. [2024-06-28 00:34:35,136 INFO L125 PetriNetUnfolderBase]: For 15091/15097 co-relation queries the response was YES. [2024-06-28 00:34:35,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18474 conditions, 4923 events. 2937/4923 cut-off events. For 15091/15097 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32620 event pairs, 494 based on Foata normal form. 13/4848 useless extension candidates. Maximal degree in co-relation 18445. Up to 3570 conditions per place. [2024-06-28 00:34:35,166 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 92 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-28 00:34:35,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 1140 flow [2024-06-28 00:34:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 00:34:35,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 00:34:35,168 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 722 flow. Second operand 5 states and 150 transitions. [2024-06-28 00:34:35,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 1140 flow [2024-06-28 00:34:35,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 132 transitions, 1081 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:35,182 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 871 flow [2024-06-28 00:34:35,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=871, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-28 00:34:35,183 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-28 00:34:35,183 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 871 flow [2024-06-28 00:34:35,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:35,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:35,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:35,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:34:35,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:35,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1097043001, now seen corresponding path program 1 times [2024-06-28 00:34:35,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:35,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715675470] [2024-06-28 00:34:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:35,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:35,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715675470] [2024-06-28 00:34:35,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715675470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:35,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:35,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:35,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650666796] [2024-06-28 00:34:35,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:35,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:35,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:35,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:35,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:35,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 871 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:35,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:35,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:35,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:35,880 INFO L124 PetriNetUnfolderBase]: 2925/4890 cut-off events. [2024-06-28 00:34:35,881 INFO L125 PetriNetUnfolderBase]: For 17873/17875 co-relation queries the response was YES. [2024-06-28 00:34:35,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18933 conditions, 4890 events. 2925/4890 cut-off events. For 17873/17875 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32203 event pairs, 1046 based on Foata normal form. 6/4810 useless extension candidates. Maximal degree in co-relation 18901. Up to 4089 conditions per place. [2024-06-28 00:34:35,928 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 108 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-06-28 00:34:35,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 137 transitions, 1255 flow [2024-06-28 00:34:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 00:34:35,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-28 00:34:35,930 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 871 flow. Second operand 5 states and 151 transitions. [2024-06-28 00:34:35,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 137 transitions, 1255 flow [2024-06-28 00:34:35,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 1233 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-28 00:34:35,953 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 967 flow [2024-06-28 00:34:35,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=967, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2024-06-28 00:34:35,953 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-28 00:34:35,953 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 967 flow [2024-06-28 00:34:35,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:35,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:34:35,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:35,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 539912104, now seen corresponding path program 1 times [2024-06-28 00:34:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:35,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238917859] [2024-06-28 00:34:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:35,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:36,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:36,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238917859] [2024-06-28 00:34:36,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238917859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:36,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:36,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:36,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965045951] [2024-06-28 00:34:36,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:36,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:36,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:36,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:36,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 967 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:36,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:36,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:36,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:36,901 INFO L124 PetriNetUnfolderBase]: 3085/5214 cut-off events. [2024-06-28 00:34:36,901 INFO L125 PetriNetUnfolderBase]: For 22067/22086 co-relation queries the response was YES. [2024-06-28 00:34:36,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20766 conditions, 5214 events. 3085/5214 cut-off events. For 22067/22086 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 35336 event pairs, 816 based on Foata normal form. 30/5162 useless extension candidates. Maximal degree in co-relation 20730. Up to 3501 conditions per place. [2024-06-28 00:34:36,929 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 125 selfloop transitions, 38 changer transitions 0/175 dead transitions. [2024-06-28 00:34:36,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 175 transitions, 1733 flow [2024-06-28 00:34:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 00:34:36,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-28 00:34:36,931 INFO L175 Difference]: Start difference. First operand has 87 places, 109 transitions, 967 flow. Second operand 6 states and 186 transitions. [2024-06-28 00:34:36,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 175 transitions, 1733 flow [2024-06-28 00:34:36,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 175 transitions, 1681 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:36,963 INFO L231 Difference]: Finished difference. Result has 94 places, 124 transitions, 1243 flow [2024-06-28 00:34:36,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1243, PETRI_PLACES=94, PETRI_TRANSITIONS=124} [2024-06-28 00:34:36,964 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-28 00:34:36,964 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 124 transitions, 1243 flow [2024-06-28 00:34:36,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:36,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:36,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:36,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:34:36,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:36,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash -569913354, now seen corresponding path program 2 times [2024-06-28 00:34:36,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:36,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846410038] [2024-06-28 00:34:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:36,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:37,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:37,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846410038] [2024-06-28 00:34:37,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846410038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:37,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:37,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:37,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139537155] [2024-06-28 00:34:37,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:37,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:37,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 124 transitions, 1243 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:37,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:37,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:37,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:38,015 INFO L124 PetriNetUnfolderBase]: 3209/5380 cut-off events. [2024-06-28 00:34:38,015 INFO L125 PetriNetUnfolderBase]: For 30078/30084 co-relation queries the response was YES. [2024-06-28 00:34:38,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22737 conditions, 5380 events. 3209/5380 cut-off events. For 30078/30084 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36590 event pairs, 522 based on Foata normal form. 33/5351 useless extension candidates. Maximal degree in co-relation 22697. Up to 2949 conditions per place. [2024-06-28 00:34:38,060 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 105 selfloop transitions, 49 changer transitions 0/166 dead transitions. [2024-06-28 00:34:38,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 166 transitions, 1780 flow [2024-06-28 00:34:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-28 00:34:38,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038461538461538 [2024-06-28 00:34:38,062 INFO L175 Difference]: Start difference. First operand has 94 places, 124 transitions, 1243 flow. Second operand 5 states and 157 transitions. [2024-06-28 00:34:38,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 166 transitions, 1780 flow [2024-06-28 00:34:38,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1760 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-28 00:34:38,129 INFO L231 Difference]: Finished difference. Result has 100 places, 128 transitions, 1431 flow [2024-06-28 00:34:38,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1431, PETRI_PLACES=100, PETRI_TRANSITIONS=128} [2024-06-28 00:34:38,130 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-28 00:34:38,131 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 128 transitions, 1431 flow [2024-06-28 00:34:38,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:38,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:38,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:38,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:34:38,131 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:38,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1803751304, now seen corresponding path program 1 times [2024-06-28 00:34:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:38,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719919685] [2024-06-28 00:34:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:38,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:38,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:38,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719919685] [2024-06-28 00:34:38,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719919685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:38,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137986844] [2024-06-28 00:34:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:38,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:38,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 128 transitions, 1431 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:38,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:38,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:38,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:39,186 INFO L124 PetriNetUnfolderBase]: 3185/5422 cut-off events. [2024-06-28 00:34:39,187 INFO L125 PetriNetUnfolderBase]: For 34962/34981 co-relation queries the response was YES. [2024-06-28 00:34:39,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23900 conditions, 5422 events. 3185/5422 cut-off events. For 34962/34981 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37565 event pairs, 868 based on Foata normal form. 18/5342 useless extension candidates. Maximal degree in co-relation 23856. Up to 3651 conditions per place. [2024-06-28 00:34:39,226 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 120 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-06-28 00:34:39,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1957 flow [2024-06-28 00:34:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-28 00:34:39,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115384615384616 [2024-06-28 00:34:39,228 INFO L175 Difference]: Start difference. First operand has 100 places, 128 transitions, 1431 flow. Second operand 5 states and 159 transitions. [2024-06-28 00:34:39,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1957 flow [2024-06-28 00:34:39,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 170 transitions, 1867 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:39,307 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1429 flow [2024-06-28 00:34:39,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1429, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-28 00:34:39,308 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-28 00:34:39,308 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1429 flow [2024-06-28 00:34:39,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:39,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:39,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:39,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:34:39,309 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:39,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash -487455622, now seen corresponding path program 2 times [2024-06-28 00:34:39,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:39,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809132117] [2024-06-28 00:34:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:39,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:39,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809132117] [2024-06-28 00:34:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809132117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064745700] [2024-06-28 00:34:39,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:39,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:39,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1429 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:39,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:39,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:39,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:40,430 INFO L124 PetriNetUnfolderBase]: 3141/5264 cut-off events. [2024-06-28 00:34:40,430 INFO L125 PetriNetUnfolderBase]: For 37519/37525 co-relation queries the response was YES. [2024-06-28 00:34:40,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23387 conditions, 5264 events. 3141/5264 cut-off events. For 37519/37525 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35626 event pairs, 466 based on Foata normal form. 13/5231 useless extension candidates. Maximal degree in co-relation 23342. Up to 2883 conditions per place. [2024-06-28 00:34:40,469 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 105 selfloop transitions, 51 changer transitions 0/168 dead transitions. [2024-06-28 00:34:40,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 168 transitions, 1880 flow [2024-06-28 00:34:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-28 00:34:40,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-28 00:34:40,470 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1429 flow. Second operand 5 states and 161 transitions. [2024-06-28 00:34:40,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 168 transitions, 1880 flow [2024-06-28 00:34:40,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1784 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:40,550 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1453 flow [2024-06-28 00:34:40,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1453, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-28 00:34:40,551 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-28 00:34:40,551 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1453 flow [2024-06-28 00:34:40,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:40,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:40,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:40,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:34:40,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:40,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1293930372, now seen corresponding path program 1 times [2024-06-28 00:34:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:40,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589946356] [2024-06-28 00:34:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:40,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:40,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:40,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589946356] [2024-06-28 00:34:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589946356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:40,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:34:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071911611] [2024-06-28 00:34:40,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:40,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:34:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:34:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:34:40,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:34:40,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1453 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:40,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:40,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:34:40,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:41,259 INFO L124 PetriNetUnfolderBase]: 2720/4791 cut-off events. [2024-06-28 00:34:41,259 INFO L125 PetriNetUnfolderBase]: For 35261/35478 co-relation queries the response was YES. [2024-06-28 00:34:41,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20927 conditions, 4791 events. 2720/4791 cut-off events. For 35261/35478 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34253 event pairs, 993 based on Foata normal form. 135/4798 useless extension candidates. Maximal degree in co-relation 20882. Up to 3635 conditions per place. [2024-06-28 00:34:41,294 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 97 selfloop transitions, 15 changer transitions 0/148 dead transitions. [2024-06-28 00:34:41,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 148 transitions, 1779 flow [2024-06-28 00:34:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:34:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:34:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-28 00:34:41,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-28 00:34:41,295 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1453 flow. Second operand 4 states and 123 transitions. [2024-06-28 00:34:41,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 148 transitions, 1779 flow [2024-06-28 00:34:41,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 148 transitions, 1689 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:41,362 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1461 flow [2024-06-28 00:34:41,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1461, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2024-06-28 00:34:41,363 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-28 00:34:41,363 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1461 flow [2024-06-28 00:34:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:41,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:41,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:41,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:34:41,364 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:41,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1551876126, now seen corresponding path program 1 times [2024-06-28 00:34:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833526963] [2024-06-28 00:34:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:41,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:41,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833526963] [2024-06-28 00:34:41,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833526963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:41,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:41,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:41,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940616461] [2024-06-28 00:34:41,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:41,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:41,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:41,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:41,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1461 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:41,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:41,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:41,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:42,417 INFO L124 PetriNetUnfolderBase]: 3217/5378 cut-off events. [2024-06-28 00:34:42,417 INFO L125 PetriNetUnfolderBase]: For 36874/36880 co-relation queries the response was YES. [2024-06-28 00:34:42,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24077 conditions, 5378 events. 3217/5378 cut-off events. For 36874/36880 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36799 event pairs, 406 based on Foata normal form. 9/5343 useless extension candidates. Maximal degree in co-relation 24030. Up to 3297 conditions per place. [2024-06-28 00:34:42,461 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 109 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-28 00:34:42,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1953 flow [2024-06-28 00:34:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-28 00:34:42,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-28 00:34:42,463 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1461 flow. Second operand 5 states and 155 transitions. [2024-06-28 00:34:42,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1953 flow [2024-06-28 00:34:42,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 172 transitions, 1931 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:42,543 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 1622 flow [2024-06-28 00:34:42,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1622, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2024-06-28 00:34:42,543 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-28 00:34:42,544 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 1622 flow [2024-06-28 00:34:42,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:42,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:42,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:42,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:34:42,544 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:42,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1837822144, now seen corresponding path program 2 times [2024-06-28 00:34:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:42,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908422955] [2024-06-28 00:34:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:42,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:42,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:42,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908422955] [2024-06-28 00:34:42,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908422955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:42,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:42,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:42,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373765758] [2024-06-28 00:34:42,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:42,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:42,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:42,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:42,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 1622 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:42,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:42,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:42,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:43,618 INFO L124 PetriNetUnfolderBase]: 3461/5846 cut-off events. [2024-06-28 00:34:43,619 INFO L125 PetriNetUnfolderBase]: For 48201/48207 co-relation queries the response was YES. [2024-06-28 00:34:43,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26878 conditions, 5846 events. 3461/5846 cut-off events. For 48201/48207 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 41398 event pairs, 540 based on Foata normal form. 25/5759 useless extension candidates. Maximal degree in co-relation 26829. Up to 2153 conditions per place. [2024-06-28 00:34:43,654 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 120 selfloop transitions, 53 changer transitions 0/185 dead transitions. [2024-06-28 00:34:43,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 2269 flow [2024-06-28 00:34:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 00:34:43,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-28 00:34:43,655 INFO L175 Difference]: Start difference. First operand has 109 places, 138 transitions, 1622 flow. Second operand 6 states and 179 transitions. [2024-06-28 00:34:43,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 2269 flow [2024-06-28 00:34:43,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 2157 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:43,742 INFO L231 Difference]: Finished difference. Result has 112 places, 140 transitions, 1666 flow [2024-06-28 00:34:43,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1666, PETRI_PLACES=112, PETRI_TRANSITIONS=140} [2024-06-28 00:34:43,742 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-28 00:34:43,742 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 140 transitions, 1666 flow [2024-06-28 00:34:43,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:43,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:43,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:43,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:34:43,743 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:43,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash 451868552, now seen corresponding path program 3 times [2024-06-28 00:34:43,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:43,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76407168] [2024-06-28 00:34:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:43,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:43,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:43,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76407168] [2024-06-28 00:34:43,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76407168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:43,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:43,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945781327] [2024-06-28 00:34:43,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:43,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:43,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:43,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 140 transitions, 1666 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:43,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:43,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:43,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:44,759 INFO L124 PetriNetUnfolderBase]: 3593/6098 cut-off events. [2024-06-28 00:34:44,759 INFO L125 PetriNetUnfolderBase]: For 54428/54434 co-relation queries the response was YES. [2024-06-28 00:34:44,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27987 conditions, 6098 events. 3593/6098 cut-off events. For 54428/54434 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43865 event pairs, 558 based on Foata normal form. 25/5993 useless extension candidates. Maximal degree in co-relation 27937. Up to 2177 conditions per place. [2024-06-28 00:34:44,805 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 118 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2024-06-28 00:34:44,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 184 transitions, 2313 flow [2024-06-28 00:34:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:34:44,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-28 00:34:44,806 INFO L175 Difference]: Start difference. First operand has 112 places, 140 transitions, 1666 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:34:44,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 184 transitions, 2313 flow [2024-06-28 00:34:44,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 184 transitions, 2241 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:44,971 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1734 flow [2024-06-28 00:34:44,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1734, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-28 00:34:44,971 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-28 00:34:44,972 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1734 flow [2024-06-28 00:34:44,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:44,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:44,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:44,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:34:44,973 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:44,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2056063424, now seen corresponding path program 4 times [2024-06-28 00:34:44,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:44,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603767768] [2024-06-28 00:34:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:45,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:45,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603767768] [2024-06-28 00:34:45,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603767768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:45,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:45,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141510754] [2024-06-28 00:34:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:45,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:45,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1734 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:45,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:45,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:45,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:46,057 INFO L124 PetriNetUnfolderBase]: 3793/6530 cut-off events. [2024-06-28 00:34:46,057 INFO L125 PetriNetUnfolderBase]: For 60382/60388 co-relation queries the response was YES. [2024-06-28 00:34:46,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29688 conditions, 6530 events. 3793/6530 cut-off events. For 60382/60388 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48465 event pairs, 450 based on Foata normal form. 25/6487 useless extension candidates. Maximal degree in co-relation 29637. Up to 4053 conditions per place. [2024-06-28 00:34:46,108 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 125 selfloop transitions, 47 changer transitions 0/184 dead transitions. [2024-06-28 00:34:46,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 184 transitions, 2266 flow [2024-06-28 00:34:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-28 00:34:46,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115384615384616 [2024-06-28 00:34:46,109 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1734 flow. Second operand 5 states and 159 transitions. [2024-06-28 00:34:46,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 184 transitions, 2266 flow [2024-06-28 00:34:46,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 184 transitions, 2198 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:46,236 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1835 flow [2024-06-28 00:34:46,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1835, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-28 00:34:46,236 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-28 00:34:46,236 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1835 flow [2024-06-28 00:34:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:46,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:46,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:46,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:34:46,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:46,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2068746594, now seen corresponding path program 5 times [2024-06-28 00:34:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:46,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367790768] [2024-06-28 00:34:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:46,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:46,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:46,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367790768] [2024-06-28 00:34:46,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367790768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:46,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:46,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909631923] [2024-06-28 00:34:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:46,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:46,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:46,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1835 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:46,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:46,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:46,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:47,428 INFO L124 PetriNetUnfolderBase]: 3853/6654 cut-off events. [2024-06-28 00:34:47,428 INFO L125 PetriNetUnfolderBase]: For 66691/66697 co-relation queries the response was YES. [2024-06-28 00:34:47,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30568 conditions, 6654 events. 3853/6654 cut-off events. For 66691/66697 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 49603 event pairs, 522 based on Foata normal form. 25/6591 useless extension candidates. Maximal degree in co-relation 30516. Up to 3189 conditions per place. [2024-06-28 00:34:47,480 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 128 selfloop transitions, 57 changer transitions 0/197 dead transitions. [2024-06-28 00:34:47,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2478 flow [2024-06-28 00:34:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:47,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-28 00:34:47,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-28 00:34:47,481 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1835 flow. Second operand 6 states and 190 transitions. [2024-06-28 00:34:47,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2478 flow [2024-06-28 00:34:47,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 197 transitions, 2360 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:47,651 INFO L231 Difference]: Finished difference. Result has 122 places, 146 transitions, 1865 flow [2024-06-28 00:34:47,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1865, PETRI_PLACES=122, PETRI_TRANSITIONS=146} [2024-06-28 00:34:47,652 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-28 00:34:47,652 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 146 transitions, 1865 flow [2024-06-28 00:34:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:47,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:47,652 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] [2024-06-28 00:34:47,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:34:47,653 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:47,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1457138507, now seen corresponding path program 1 times [2024-06-28 00:34:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161332858] [2024-06-28 00:34:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161332858] [2024-06-28 00:34:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161332858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:47,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:47,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158370138] [2024-06-28 00:34:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:47,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:47,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:34:47,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 146 transitions, 1865 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:47,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:47,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:34:47,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:48,606 INFO L124 PetriNetUnfolderBase]: 3254/5950 cut-off events. [2024-06-28 00:34:48,606 INFO L125 PetriNetUnfolderBase]: For 66324/66675 co-relation queries the response was YES. [2024-06-28 00:34:48,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 5950 events. 3254/5950 cut-off events. For 66324/66675 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 46448 event pairs, 1187 based on Foata normal form. 255/6031 useless extension candidates. Maximal degree in co-relation 26992. Up to 4502 conditions per place. [2024-06-28 00:34:48,653 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 107 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2024-06-28 00:34:48,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 160 transitions, 2147 flow [2024-06-28 00:34:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:34:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:34:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-28 00:34:48,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-28 00:34:48,655 INFO L175 Difference]: Start difference. First operand has 122 places, 146 transitions, 1865 flow. Second operand 4 states and 122 transitions. [2024-06-28 00:34:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 160 transitions, 2147 flow [2024-06-28 00:34:48,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 2009 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:48,801 INFO L231 Difference]: Finished difference. Result has 122 places, 146 transitions, 1771 flow [2024-06-28 00:34:48,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1771, PETRI_PLACES=122, PETRI_TRANSITIONS=146} [2024-06-28 00:34:48,802 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-28 00:34:48,802 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 146 transitions, 1771 flow [2024-06-28 00:34:48,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:48,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:48,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:48,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:34:48,803 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:48,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:48,804 INFO L85 PathProgramCache]: Analyzing trace with hash -20780341, now seen corresponding path program 1 times [2024-06-28 00:34:48,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:48,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242805136] [2024-06-28 00:34:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:49,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:49,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242805136] [2024-06-28 00:34:49,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242805136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:49,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:49,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:34:49,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608174897] [2024-06-28 00:34:49,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:49,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:34:49,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:34:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:34:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 146 transitions, 1771 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:49,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:49,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:50,155 INFO L124 PetriNetUnfolderBase]: 3911/6764 cut-off events. [2024-06-28 00:34:50,155 INFO L125 PetriNetUnfolderBase]: For 67135/67141 co-relation queries the response was YES. [2024-06-28 00:34:50,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30240 conditions, 6764 events. 3911/6764 cut-off events. For 67135/67141 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50476 event pairs, 830 based on Foata normal form. 17/6707 useless extension candidates. Maximal degree in co-relation 30186. Up to 3859 conditions per place. [2024-06-28 00:34:50,205 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 126 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2024-06-28 00:34:50,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 194 transitions, 2358 flow [2024-06-28 00:34:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 00:34:50,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 00:34:50,206 INFO L175 Difference]: Start difference. First operand has 122 places, 146 transitions, 1771 flow. Second operand 6 states and 182 transitions. [2024-06-28 00:34:50,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 194 transitions, 2358 flow [2024-06-28 00:34:50,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 194 transitions, 2290 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:50,362 INFO L231 Difference]: Finished difference. Result has 126 places, 152 transitions, 1959 flow [2024-06-28 00:34:50,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1959, PETRI_PLACES=126, PETRI_TRANSITIONS=152} [2024-06-28 00:34:50,362 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-28 00:34:50,362 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 152 transitions, 1959 flow [2024-06-28 00:34:50,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:50,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:50,363 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] [2024-06-28 00:34:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:34:50,363 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:50,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash -521402019, now seen corresponding path program 2 times [2024-06-28 00:34:50,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:50,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722583950] [2024-06-28 00:34:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:50,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:50,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:50,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722583950] [2024-06-28 00:34:50,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722583950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:50,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:50,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:50,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806318528] [2024-06-28 00:34:50,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:50,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:50,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:50,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:50,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:50,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 152 transitions, 1959 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:50,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:50,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:50,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:51,721 INFO L124 PetriNetUnfolderBase]: 4853/8426 cut-off events. [2024-06-28 00:34:51,721 INFO L125 PetriNetUnfolderBase]: For 96408/96414 co-relation queries the response was YES. [2024-06-28 00:34:51,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38100 conditions, 8426 events. 4853/8426 cut-off events. For 96408/96414 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 65877 event pairs, 1044 based on Foata normal form. 41/8367 useless extension candidates. Maximal degree in co-relation 38044. Up to 2440 conditions per place. [2024-06-28 00:34:51,784 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 156 selfloop transitions, 43 changer transitions 0/211 dead transitions. [2024-06-28 00:34:51,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 211 transitions, 2708 flow [2024-06-28 00:34:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-28 00:34:51,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-28 00:34:51,785 INFO L175 Difference]: Start difference. First operand has 126 places, 152 transitions, 1959 flow. Second operand 6 states and 188 transitions. [2024-06-28 00:34:51,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 211 transitions, 2708 flow [2024-06-28 00:34:52,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2527 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:52,024 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1965 flow [2024-06-28 00:34:52,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1965, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-28 00:34:52,024 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-28 00:34:52,024 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1965 flow [2024-06-28 00:34:52,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:52,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:52,025 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] [2024-06-28 00:34:52,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:34:52,025 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:52,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:52,026 INFO L85 PathProgramCache]: Analyzing trace with hash -825778841, now seen corresponding path program 1 times [2024-06-28 00:34:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932666358] [2024-06-28 00:34:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:52,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:52,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932666358] [2024-06-28 00:34:52,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932666358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:52,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:52,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:52,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495162626] [2024-06-28 00:34:52,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:52,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:52,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:52,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:52,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:52,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:34:52,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1965 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:52,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:52,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:34:52,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:53,360 INFO L124 PetriNetUnfolderBase]: 4173/7605 cut-off events. [2024-06-28 00:34:53,360 INFO L125 PetriNetUnfolderBase]: For 97121/97495 co-relation queries the response was YES. [2024-06-28 00:34:53,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34625 conditions, 7605 events. 4173/7605 cut-off events. For 97121/97495 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 61504 event pairs, 1415 based on Foata normal form. 275/7696 useless extension candidates. Maximal degree in co-relation 34566. Up to 5570 conditions per place. [2024-06-28 00:34:53,420 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 101 selfloop transitions, 43 changer transitions 0/187 dead transitions. [2024-06-28 00:34:53,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 2408 flow [2024-06-28 00:34:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-28 00:34:53,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-28 00:34:53,421 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1965 flow. Second operand 5 states and 155 transitions. [2024-06-28 00:34:53,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 2408 flow [2024-06-28 00:34:53,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 2344 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:53,668 INFO L231 Difference]: Finished difference. Result has 132 places, 161 transitions, 2090 flow [2024-06-28 00:34:53,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2090, PETRI_PLACES=132, PETRI_TRANSITIONS=161} [2024-06-28 00:34:53,669 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-28 00:34:53,669 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 161 transitions, 2090 flow [2024-06-28 00:34:53,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:53,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:53,669 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] [2024-06-28 00:34:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:34:53,670 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1297605077, now seen corresponding path program 2 times [2024-06-28 00:34:53,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:53,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29456546] [2024-06-28 00:34:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:53,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:53,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29456546] [2024-06-28 00:34:53,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29456546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:53,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:53,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465660347] [2024-06-28 00:34:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:53,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:53,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:53,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:34:53,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 161 transitions, 2090 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:53,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:53,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:34:53,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:54,951 INFO L124 PetriNetUnfolderBase]: 4206/7622 cut-off events. [2024-06-28 00:34:54,951 INFO L125 PetriNetUnfolderBase]: For 99858/100249 co-relation queries the response was YES. [2024-06-28 00:34:54,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35117 conditions, 7622 events. 4206/7622 cut-off events. For 99858/100249 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 61504 event pairs, 1445 based on Foata normal form. 276/7677 useless extension candidates. Maximal degree in co-relation 35056. Up to 5519 conditions per place. [2024-06-28 00:34:55,010 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 94 selfloop transitions, 45 changer transitions 0/182 dead transitions. [2024-06-28 00:34:55,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 2516 flow [2024-06-28 00:34:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-28 00:34:55,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 00:34:55,011 INFO L175 Difference]: Start difference. First operand has 132 places, 161 transitions, 2090 flow. Second operand 5 states and 143 transitions. [2024-06-28 00:34:55,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 2516 flow [2024-06-28 00:34:55,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 2468 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:55,229 INFO L231 Difference]: Finished difference. Result has 135 places, 166 transitions, 2212 flow [2024-06-28 00:34:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2212, PETRI_PLACES=135, PETRI_TRANSITIONS=166} [2024-06-28 00:34:55,229 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-28 00:34:55,229 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 166 transitions, 2212 flow [2024-06-28 00:34:55,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:55,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:55,230 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] [2024-06-28 00:34:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:34:55,230 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:55,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2083832285, now seen corresponding path program 1 times [2024-06-28 00:34:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434180644] [2024-06-28 00:34:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:55,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:55,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434180644] [2024-06-28 00:34:55,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434180644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:55,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:55,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:55,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675290158] [2024-06-28 00:34:55,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:55,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:55,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:55,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:55,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 166 transitions, 2212 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:55,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:55,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:55,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:56,429 INFO L124 PetriNetUnfolderBase]: 4795/8395 cut-off events. [2024-06-28 00:34:56,429 INFO L125 PetriNetUnfolderBase]: For 106100/106100 co-relation queries the response was YES. [2024-06-28 00:34:56,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39695 conditions, 8395 events. 4795/8395 cut-off events. For 106100/106100 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 66352 event pairs, 1903 based on Foata normal form. 2/8218 useless extension candidates. Maximal degree in co-relation 39633. Up to 6938 conditions per place. [2024-06-28 00:34:56,491 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 176 selfloop transitions, 17 changer transitions 0/205 dead transitions. [2024-06-28 00:34:56,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 205 transitions, 2866 flow [2024-06-28 00:34:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-28 00:34:56,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-28 00:34:56,492 INFO L175 Difference]: Start difference. First operand has 135 places, 166 transitions, 2212 flow. Second operand 5 states and 148 transitions. [2024-06-28 00:34:56,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 205 transitions, 2866 flow [2024-06-28 00:34:56,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 205 transitions, 2811 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:56,701 INFO L231 Difference]: Finished difference. Result has 140 places, 176 transitions, 2352 flow [2024-06-28 00:34:56,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2352, PETRI_PLACES=140, PETRI_TRANSITIONS=176} [2024-06-28 00:34:56,702 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-28 00:34:56,702 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 176 transitions, 2352 flow [2024-06-28 00:34:56,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:56,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:56,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:56,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:34:56,703 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:56,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1271680955, now seen corresponding path program 2 times [2024-06-28 00:34:56,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:56,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821502451] [2024-06-28 00:34:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821502451] [2024-06-28 00:34:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821502451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:56,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:56,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:56,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179629354] [2024-06-28 00:34:56,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:56,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:56,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:34:56,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 176 transitions, 2352 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:56,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:56,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:34:56,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:57,818 INFO L124 PetriNetUnfolderBase]: 4788/8343 cut-off events. [2024-06-28 00:34:57,818 INFO L125 PetriNetUnfolderBase]: For 113037/113037 co-relation queries the response was YES. [2024-06-28 00:34:57,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40314 conditions, 8343 events. 4788/8343 cut-off events. For 113037/113037 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 65524 event pairs, 2000 based on Foata normal form. 2/8162 useless extension candidates. Maximal degree in co-relation 40248. Up to 6934 conditions per place. [2024-06-28 00:34:57,884 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 167 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2024-06-28 00:34:57,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 200 transitions, 2891 flow [2024-06-28 00:34:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-28 00:34:57,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346153846153846 [2024-06-28 00:34:57,886 INFO L175 Difference]: Start difference. First operand has 140 places, 176 transitions, 2352 flow. Second operand 5 states and 139 transitions. [2024-06-28 00:34:57,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 200 transitions, 2891 flow [2024-06-28 00:34:58,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 2853 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-28 00:34:58,154 INFO L231 Difference]: Finished difference. Result has 146 places, 181 transitions, 2446 flow [2024-06-28 00:34:58,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2446, PETRI_PLACES=146, PETRI_TRANSITIONS=181} [2024-06-28 00:34:58,155 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-28 00:34:58,155 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 181 transitions, 2446 flow [2024-06-28 00:34:58,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:58,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:58,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:58,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:34:58,155 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:58,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash -351604788, now seen corresponding path program 1 times [2024-06-28 00:34:58,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:58,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887421386] [2024-06-28 00:34:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:58,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:58,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887421386] [2024-06-28 00:34:58,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887421386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:58,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:58,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:58,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572612509] [2024-06-28 00:34:58,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:58,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:58,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:58,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:58,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:34:58,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 181 transitions, 2446 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:58,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:58,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:34:58,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:59,567 INFO L124 PetriNetUnfolderBase]: 4289/7761 cut-off events. [2024-06-28 00:34:59,567 INFO L125 PetriNetUnfolderBase]: For 126400/126793 co-relation queries the response was YES. [2024-06-28 00:34:59,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37507 conditions, 7761 events. 4289/7761 cut-off events. For 126400/126793 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 62746 event pairs, 1286 based on Foata normal form. 312/7867 useless extension candidates. Maximal degree in co-relation 37437. Up to 5460 conditions per place. [2024-06-28 00:34:59,638 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 106 selfloop transitions, 52 changer transitions 0/206 dead transitions. [2024-06-28 00:34:59,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 206 transitions, 2905 flow [2024-06-28 00:34:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 00:34:59,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-28 00:34:59,639 INFO L175 Difference]: Start difference. First operand has 146 places, 181 transitions, 2446 flow. Second operand 5 states and 146 transitions. [2024-06-28 00:34:59,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 206 transitions, 2905 flow [2024-06-28 00:34:59,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 206 transitions, 2800 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:59,895 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2584 flow [2024-06-28 00:34:59,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2584, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-28 00:34:59,895 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-28 00:34:59,895 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2584 flow [2024-06-28 00:34:59,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:59,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:59,896 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] [2024-06-28 00:34:59,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:34:59,896 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:34:59,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 150267852, now seen corresponding path program 2 times [2024-06-28 00:34:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:59,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128058431] [2024-06-28 00:34:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:00,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:00,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128058431] [2024-06-28 00:35:00,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128058431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:00,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:00,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:00,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7074505] [2024-06-28 00:35:00,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:00,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:00,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:00,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-28 00:35:00,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2584 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:00,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:00,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-28 00:35:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:01,421 INFO L124 PetriNetUnfolderBase]: 4253/7737 cut-off events. [2024-06-28 00:35:01,422 INFO L125 PetriNetUnfolderBase]: For 130752/131144 co-relation queries the response was YES. [2024-06-28 00:35:01,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38283 conditions, 7737 events. 4253/7737 cut-off events. For 130752/131144 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 62661 event pairs, 1408 based on Foata normal form. 284/7803 useless extension candidates. Maximal degree in co-relation 38210. Up to 5640 conditions per place. [2024-06-28 00:35:01,497 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 108 selfloop transitions, 47 changer transitions 0/203 dead transitions. [2024-06-28 00:35:01,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2934 flow [2024-06-28 00:35:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:35:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:35:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-28 00:35:01,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 00:35:01,498 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2584 flow. Second operand 5 states and 143 transitions. [2024-06-28 00:35:01,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2934 flow [2024-06-28 00:35:01,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 203 transitions, 2861 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-28 00:35:01,836 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 2615 flow [2024-06-28 00:35:01,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2615, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-06-28 00:35:01,837 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2024-06-28 00:35:01,837 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 2615 flow [2024-06-28 00:35:01,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:01,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:01,837 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] [2024-06-28 00:35:01,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:35:01,838 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:01,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash -174288756, now seen corresponding path program 1 times [2024-06-28 00:35:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141921662] [2024-06-28 00:35:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:01,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141921662] [2024-06-28 00:35:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141921662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:02,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332007723] [2024-06-28 00:35:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:02,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:02,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:02,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:02,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 2615 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) [2024-06-28 00:35:02,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:02,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:03,254 INFO L124 PetriNetUnfolderBase]: 4848/8518 cut-off events. [2024-06-28 00:35:03,254 INFO L125 PetriNetUnfolderBase]: For 122978/122978 co-relation queries the response was YES. [2024-06-28 00:35:03,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41948 conditions, 8518 events. 4848/8518 cut-off events. For 122978/122978 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 67584 event pairs, 1969 based on Foata normal form. 4/8338 useless extension candidates. Maximal degree in co-relation 41873. Up to 7014 conditions per place. [2024-06-28 00:35:03,334 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 184 selfloop transitions, 21 changer transitions 0/217 dead transitions. [2024-06-28 00:35:03,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 217 transitions, 3177 flow [2024-06-28 00:35:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:35:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:35:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-28 00:35:03,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573076923076923 [2024-06-28 00:35:03,335 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 2615 flow. Second operand 5 states and 149 transitions. [2024-06-28 00:35:03,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 217 transitions, 3177 flow [2024-06-28 00:35:03,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 3132 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 00:35:03,664 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 2649 flow [2024-06-28 00:35:03,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-28 00:35:03,665 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-28 00:35:03,665 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 2649 flow [2024-06-28 00:35:03,665 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) [2024-06-28 00:35:03,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:03,665 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] [2024-06-28 00:35:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:35:03,666 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:03,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:03,666 INFO L85 PathProgramCache]: Analyzing trace with hash -767015352, now seen corresponding path program 2 times [2024-06-28 00:35:03,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:03,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962503067] [2024-06-28 00:35:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:03,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:03,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962503067] [2024-06-28 00:35:03,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962503067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:03,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:03,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:03,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13645767] [2024-06-28 00:35:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:03,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:03,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:03,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 2649 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) [2024-06-28 00:35:03,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:03,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:03,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:05,072 INFO L124 PetriNetUnfolderBase]: 4836/8495 cut-off events. [2024-06-28 00:35:05,072 INFO L125 PetriNetUnfolderBase]: For 126954/126954 co-relation queries the response was YES. [2024-06-28 00:35:05,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41707 conditions, 8495 events. 4836/8495 cut-off events. For 126954/126954 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 67328 event pairs, 1895 based on Foata normal form. 4/8316 useless extension candidates. Maximal degree in co-relation 41630. Up to 7006 conditions per place. [2024-06-28 00:35:05,145 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 179 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2024-06-28 00:35:05,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 216 transitions, 3129 flow [2024-06-28 00:35:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 00:35:05,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-28 00:35:05,147 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 2649 flow. Second operand 6 states and 166 transitions. [2024-06-28 00:35:05,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 216 transitions, 3129 flow [2024-06-28 00:35:05,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 216 transitions, 3076 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:05,451 INFO L231 Difference]: Finished difference. Result has 163 places, 189 transitions, 2659 flow [2024-06-28 00:35:05,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2659, PETRI_PLACES=163, PETRI_TRANSITIONS=189} [2024-06-28 00:35:05,452 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-28 00:35:05,452 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 189 transitions, 2659 flow [2024-06-28 00:35:05,453 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) [2024-06-28 00:35:05,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:05,453 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] [2024-06-28 00:35:05,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:35:05,453 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:05,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:05,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1217115842, now seen corresponding path program 1 times [2024-06-28 00:35:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994356970] [2024-06-28 00:35:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:05,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:05,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994356970] [2024-06-28 00:35:05,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994356970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:05,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:05,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:05,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100151885] [2024-06-28 00:35:05,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:05,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:05,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:05,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-28 00:35:05,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 189 transitions, 2659 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:05,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:05,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-28 00:35:05,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:06,827 INFO L124 PetriNetUnfolderBase]: 4507/8037 cut-off events. [2024-06-28 00:35:06,827 INFO L125 PetriNetUnfolderBase]: For 133171/133258 co-relation queries the response was YES. [2024-06-28 00:35:06,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39575 conditions, 8037 events. 4507/8037 cut-off events. For 133171/133258 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 64500 event pairs, 1495 based on Foata normal form. 67/7932 useless extension candidates. Maximal degree in co-relation 39497. Up to 5502 conditions per place. [2024-06-28 00:35:06,898 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 134 selfloop transitions, 53 changer transitions 0/216 dead transitions. [2024-06-28 00:35:06,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 216 transitions, 3297 flow [2024-06-28 00:35:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:35:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:35:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-28 00:35:06,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2024-06-28 00:35:06,899 INFO L175 Difference]: Start difference. First operand has 163 places, 189 transitions, 2659 flow. Second operand 5 states and 144 transitions. [2024-06-28 00:35:06,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 216 transitions, 3297 flow [2024-06-28 00:35:07,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 216 transitions, 3224 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:07,212 INFO L231 Difference]: Finished difference. Result has 162 places, 193 transitions, 2760 flow [2024-06-28 00:35:07,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2760, PETRI_PLACES=162, PETRI_TRANSITIONS=193} [2024-06-28 00:35:07,213 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-28 00:35:07,213 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 193 transitions, 2760 flow [2024-06-28 00:35:07,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:07,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:07,213 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] [2024-06-28 00:35:07,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:35:07,213 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:07,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash 183403812, now seen corresponding path program 1 times [2024-06-28 00:35:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:07,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897452725] [2024-06-28 00:35:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:07,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:07,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:07,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897452725] [2024-06-28 00:35:07,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897452725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:07,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:07,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183221935] [2024-06-28 00:35:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:07,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:07,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:07,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:07,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:07,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:07,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 193 transitions, 2760 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) [2024-06-28 00:35:07,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:07,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:07,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:08,707 INFO L124 PetriNetUnfolderBase]: 4924/8659 cut-off events. [2024-06-28 00:35:08,708 INFO L125 PetriNetUnfolderBase]: For 143628/143636 co-relation queries the response was YES. [2024-06-28 00:35:08,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43656 conditions, 8659 events. 4924/8659 cut-off events. For 143628/143636 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 68885 event pairs, 1656 based on Foata normal form. 10/8511 useless extension candidates. Maximal degree in co-relation 43578. Up to 6926 conditions per place. [2024-06-28 00:35:08,784 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 201 selfloop transitions, 44 changer transitions 0/257 dead transitions. [2024-06-28 00:35:08,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 257 transitions, 3632 flow [2024-06-28 00:35:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-28 00:35:08,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-28 00:35:08,785 INFO L175 Difference]: Start difference. First operand has 162 places, 193 transitions, 2760 flow. Second operand 7 states and 213 transitions. [2024-06-28 00:35:08,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 257 transitions, 3632 flow [2024-06-28 00:35:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 257 transitions, 3618 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-28 00:35:09,165 INFO L231 Difference]: Finished difference. Result has 170 places, 203 transitions, 3021 flow [2024-06-28 00:35:09,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3021, PETRI_PLACES=170, PETRI_TRANSITIONS=203} [2024-06-28 00:35:09,166 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-28 00:35:09,166 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 203 transitions, 3021 flow [2024-06-28 00:35:09,166 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) [2024-06-28 00:35:09,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:09,166 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] [2024-06-28 00:35:09,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:35:09,167 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:09,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1971786324, now seen corresponding path program 2 times [2024-06-28 00:35:09,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:09,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166067437] [2024-06-28 00:35:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:09,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:09,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:09,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166067437] [2024-06-28 00:35:09,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166067437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:09,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:09,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077289120] [2024-06-28 00:35:09,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:09,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:09,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 203 transitions, 3021 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) [2024-06-28 00:35:09,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:09,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:09,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:10,546 INFO L124 PetriNetUnfolderBase]: 4917/8638 cut-off events. [2024-06-28 00:35:10,547 INFO L125 PetriNetUnfolderBase]: For 152399/152407 co-relation queries the response was YES. [2024-06-28 00:35:10,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44622 conditions, 8638 events. 4917/8638 cut-off events. For 152399/152407 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 68779 event pairs, 1657 based on Foata normal form. 10/8488 useless extension candidates. Maximal degree in co-relation 44540. Up to 6922 conditions per place. [2024-06-28 00:35:10,635 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 183 selfloop transitions, 48 changer transitions 0/243 dead transitions. [2024-06-28 00:35:10,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 243 transitions, 3724 flow [2024-06-28 00:35:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:10,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:35:10,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-28 00:35:10,636 INFO L175 Difference]: Start difference. First operand has 170 places, 203 transitions, 3021 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:35:10,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 243 transitions, 3724 flow [2024-06-28 00:35:11,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 243 transitions, 3638 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:11,175 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 3148 flow [2024-06-28 00:35:11,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3148, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-06-28 00:35:11,175 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-28 00:35:11,175 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 3148 flow [2024-06-28 00:35:11,175 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) [2024-06-28 00:35:11,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:11,176 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] [2024-06-28 00:35:11,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:35:11,176 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:11,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash -976524846, now seen corresponding path program 3 times [2024-06-28 00:35:11,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:11,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171905769] [2024-06-28 00:35:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:11,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:11,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:11,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171905769] [2024-06-28 00:35:11,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171905769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:11,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:11,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378182689] [2024-06-28 00:35:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:11,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:11,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:11,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 3148 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) [2024-06-28 00:35:11,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:11,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:11,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:12,644 INFO L124 PetriNetUnfolderBase]: 4929/8677 cut-off events. [2024-06-28 00:35:12,644 INFO L125 PetriNetUnfolderBase]: For 155137/155156 co-relation queries the response was YES. [2024-06-28 00:35:12,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45421 conditions, 8677 events. 4929/8677 cut-off events. For 155137/155156 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 69126 event pairs, 1687 based on Foata normal form. 16/8526 useless extension candidates. Maximal degree in co-relation 45337. Up to 6854 conditions per place. [2024-06-28 00:35:12,729 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 191 selfloop transitions, 48 changer transitions 0/251 dead transitions. [2024-06-28 00:35:12,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 251 transitions, 3938 flow [2024-06-28 00:35:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:35:12,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-28 00:35:12,731 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 3148 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:35:12,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 251 transitions, 3938 flow [2024-06-28 00:35:13,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 251 transitions, 3863 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:13,114 INFO L231 Difference]: Finished difference. Result has 179 places, 217 transitions, 3344 flow [2024-06-28 00:35:13,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3073, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3344, PETRI_PLACES=179, PETRI_TRANSITIONS=217} [2024-06-28 00:35:13,114 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-28 00:35:13,114 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 217 transitions, 3344 flow [2024-06-28 00:35:13,114 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) [2024-06-28 00:35:13,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:13,114 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] [2024-06-28 00:35:13,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:35:13,115 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:13,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1974633316, now seen corresponding path program 4 times [2024-06-28 00:35:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109546132] [2024-06-28 00:35:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109546132] [2024-06-28 00:35:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109546132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:13,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:13,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143943067] [2024-06-28 00:35:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:13,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:13,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:13,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 217 transitions, 3344 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) [2024-06-28 00:35:13,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:13,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:13,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:14,615 INFO L124 PetriNetUnfolderBase]: 4941/8665 cut-off events. [2024-06-28 00:35:14,616 INFO L125 PetriNetUnfolderBase]: For 169326/169401 co-relation queries the response was YES. [2024-06-28 00:35:14,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46391 conditions, 8665 events. 4941/8665 cut-off events. For 169326/169401 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 68896 event pairs, 1753 based on Foata normal form. 60/8555 useless extension candidates. Maximal degree in co-relation 46305. Up to 6862 conditions per place. [2024-06-28 00:35:14,701 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 181 selfloop transitions, 58 changer transitions 0/251 dead transitions. [2024-06-28 00:35:14,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 251 transitions, 4169 flow [2024-06-28 00:35:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-28 00:35:14,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-28 00:35:14,702 INFO L175 Difference]: Start difference. First operand has 179 places, 217 transitions, 3344 flow. Second operand 6 states and 164 transitions. [2024-06-28 00:35:14,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 251 transitions, 4169 flow [2024-06-28 00:35:15,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 251 transitions, 4098 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-28 00:35:15,094 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 3567 flow [2024-06-28 00:35:15,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3567, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-28 00:35:15,094 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-28 00:35:15,094 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 3567 flow [2024-06-28 00:35:15,094 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) [2024-06-28 00:35:15,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:15,095 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] [2024-06-28 00:35:15,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:35:15,095 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:15,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:15,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1761963300, now seen corresponding path program 5 times [2024-06-28 00:35:15,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:15,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052495441] [2024-06-28 00:35:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:15,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:15,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052495441] [2024-06-28 00:35:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052495441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:15,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:15,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386933610] [2024-06-28 00:35:15,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:15,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:15,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:15,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 3567 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) [2024-06-28 00:35:15,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:15,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:15,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:16,632 INFO L124 PetriNetUnfolderBase]: 4934/8657 cut-off events. [2024-06-28 00:35:16,632 INFO L125 PetriNetUnfolderBase]: For 178109/178184 co-relation queries the response was YES. [2024-06-28 00:35:16,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46878 conditions, 8657 events. 4934/8657 cut-off events. For 178109/178184 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 68959 event pairs, 1751 based on Foata normal form. 60/8546 useless extension candidates. Maximal degree in co-relation 46788. Up to 6858 conditions per place. [2024-06-28 00:35:16,718 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 180 selfloop transitions, 58 changer transitions 0/250 dead transitions. [2024-06-28 00:35:16,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 250 transitions, 4175 flow [2024-06-28 00:35:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-28 00:35:16,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2024-06-28 00:35:16,719 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 3567 flow. Second operand 6 states and 163 transitions. [2024-06-28 00:35:16,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 250 transitions, 4175 flow [2024-06-28 00:35:17,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 250 transitions, 4061 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-28 00:35:17,167 INFO L231 Difference]: Finished difference. Result has 190 places, 226 transitions, 3575 flow [2024-06-28 00:35:17,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3575, PETRI_PLACES=190, PETRI_TRANSITIONS=226} [2024-06-28 00:35:17,167 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-28 00:35:17,167 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 226 transitions, 3575 flow [2024-06-28 00:35:17,168 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) [2024-06-28 00:35:17,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:17,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:17,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:35:17,168 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:17,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash 23696820, now seen corresponding path program 1 times [2024-06-28 00:35:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:17,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226825971] [2024-06-28 00:35:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:17,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226825971] [2024-06-28 00:35:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226825971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:17,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:17,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694728783] [2024-06-28 00:35:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:17,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:17,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:17,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 226 transitions, 3575 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) [2024-06-28 00:35:17,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:17,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:17,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:18,640 INFO L124 PetriNetUnfolderBase]: 4946/8645 cut-off events. [2024-06-28 00:35:18,641 INFO L125 PetriNetUnfolderBase]: For 184185/184187 co-relation queries the response was YES. [2024-06-28 00:35:18,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47393 conditions, 8645 events. 4946/8645 cut-off events. For 184185/184187 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 68299 event pairs, 1962 based on Foata normal form. 4/8477 useless extension candidates. Maximal degree in co-relation 47300. Up to 6968 conditions per place. [2024-06-28 00:35:18,720 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 220 selfloop transitions, 38 changer transitions 0/270 dead transitions. [2024-06-28 00:35:18,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 270 transitions, 4509 flow [2024-06-28 00:35:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:35:18,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-28 00:35:18,722 INFO L175 Difference]: Start difference. First operand has 190 places, 226 transitions, 3575 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:35:18,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 270 transitions, 4509 flow [2024-06-28 00:35:19,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 270 transitions, 4416 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:19,239 INFO L231 Difference]: Finished difference. Result has 193 places, 233 transitions, 3720 flow [2024-06-28 00:35:19,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3720, PETRI_PLACES=193, PETRI_TRANSITIONS=233} [2024-06-28 00:35:19,239 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2024-06-28 00:35:19,240 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 233 transitions, 3720 flow [2024-06-28 00:35:19,240 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) [2024-06-28 00:35:19,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:19,240 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] [2024-06-28 00:35:19,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:35:19,240 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:19,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1107989406, now seen corresponding path program 2 times [2024-06-28 00:35:19,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:19,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800971585] [2024-06-28 00:35:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:19,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:19,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800971585] [2024-06-28 00:35:19,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800971585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:19,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:19,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786221594] [2024-06-28 00:35:19,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:19,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:19,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:19,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 233 transitions, 3720 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) [2024-06-28 00:35:19,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:19,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:19,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:20,672 INFO L124 PetriNetUnfolderBase]: 4977/8692 cut-off events. [2024-06-28 00:35:20,673 INFO L125 PetriNetUnfolderBase]: For 195385/195387 co-relation queries the response was YES. [2024-06-28 00:35:20,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48558 conditions, 8692 events. 4977/8692 cut-off events. For 195385/195387 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 68684 event pairs, 1969 based on Foata normal form. 4/8523 useless extension candidates. Maximal degree in co-relation 48464. Up to 6988 conditions per place. [2024-06-28 00:35:20,764 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 215 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-28 00:35:20,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 270 transitions, 4616 flow [2024-06-28 00:35:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:35:20,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-28 00:35:20,765 INFO L175 Difference]: Start difference. First operand has 193 places, 233 transitions, 3720 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:35:20,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 270 transitions, 4616 flow [2024-06-28 00:35:21,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 4508 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-28 00:35:21,493 INFO L231 Difference]: Finished difference. Result has 199 places, 239 transitions, 3864 flow [2024-06-28 00:35:21,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3864, PETRI_PLACES=199, PETRI_TRANSITIONS=239} [2024-06-28 00:35:21,494 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-28 00:35:21,494 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 239 transitions, 3864 flow [2024-06-28 00:35:21,494 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) [2024-06-28 00:35:21,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:21,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:21,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:35:21,494 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:21,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1516533628, now seen corresponding path program 3 times [2024-06-28 00:35:21,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:21,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035291722] [2024-06-28 00:35:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:21,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:21,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:21,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035291722] [2024-06-28 00:35:21,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035291722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:21,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:21,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:21,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095430453] [2024-06-28 00:35:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:21,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:21,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:21,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:21,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 239 transitions, 3864 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) [2024-06-28 00:35:21,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:21,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:21,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:23,143 INFO L124 PetriNetUnfolderBase]: 4970/8709 cut-off events. [2024-06-28 00:35:23,144 INFO L125 PetriNetUnfolderBase]: For 201363/201365 co-relation queries the response was YES. [2024-06-28 00:35:23,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49123 conditions, 8709 events. 4970/8709 cut-off events. For 201363/201365 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 69242 event pairs, 1818 based on Foata normal form. 4/8540 useless extension candidates. Maximal degree in co-relation 49026. Up to 7089 conditions per place. [2024-06-28 00:35:23,238 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 219 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-28 00:35:23,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 267 transitions, 4544 flow [2024-06-28 00:35:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:35:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:35:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 00:35:23,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-28 00:35:23,239 INFO L175 Difference]: Start difference. First operand has 199 places, 239 transitions, 3864 flow. Second operand 5 states and 151 transitions. [2024-06-28 00:35:23,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 267 transitions, 4544 flow [2024-06-28 00:35:23,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 267 transitions, 4401 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:23,778 INFO L231 Difference]: Finished difference. Result has 202 places, 239 transitions, 3803 flow [2024-06-28 00:35:23,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3803, PETRI_PLACES=202, PETRI_TRANSITIONS=239} [2024-06-28 00:35:23,778 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 147 predicate places. [2024-06-28 00:35:23,778 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 239 transitions, 3803 flow [2024-06-28 00:35:23,778 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) [2024-06-28 00:35:23,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:23,779 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] [2024-06-28 00:35:23,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:35:23,779 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:23,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash -704382298, now seen corresponding path program 4 times [2024-06-28 00:35:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:23,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26251540] [2024-06-28 00:35:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:23,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:23,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26251540] [2024-06-28 00:35:23,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26251540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:23,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:23,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:23,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538091326] [2024-06-28 00:35:23,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:23,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:23,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:23,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:23,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 239 transitions, 3803 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) [2024-06-28 00:35:23,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:23,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:23,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:25,275 INFO L124 PetriNetUnfolderBase]: 4963/8684 cut-off events. [2024-06-28 00:35:25,275 INFO L125 PetriNetUnfolderBase]: For 209977/209979 co-relation queries the response was YES. [2024-06-28 00:35:25,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49018 conditions, 8684 events. 4963/8684 cut-off events. For 209977/209979 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 68672 event pairs, 1968 based on Foata normal form. 4/8516 useless extension candidates. Maximal degree in co-relation 48920. Up to 7085 conditions per place. [2024-06-28 00:35:25,361 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 216 selfloop transitions, 44 changer transitions 0/272 dead transitions. [2024-06-28 00:35:25,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 272 transitions, 4547 flow [2024-06-28 00:35:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-28 00:35:25,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-28 00:35:25,362 INFO L175 Difference]: Start difference. First operand has 202 places, 239 transitions, 3803 flow. Second operand 7 states and 193 transitions. [2024-06-28 00:35:25,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 272 transitions, 4547 flow [2024-06-28 00:35:25,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 272 transitions, 4465 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:35:25,900 INFO L231 Difference]: Finished difference. Result has 205 places, 242 transitions, 3897 flow [2024-06-28 00:35:25,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3725, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3897, PETRI_PLACES=205, PETRI_TRANSITIONS=242} [2024-06-28 00:35:25,900 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-28 00:35:25,901 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 242 transitions, 3897 flow [2024-06-28 00:35:25,901 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) [2024-06-28 00:35:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:25,901 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] [2024-06-28 00:35:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:35:25,901 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:25,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 369050722, now seen corresponding path program 5 times [2024-06-28 00:35:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914948348] [2024-06-28 00:35:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:26,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914948348] [2024-06-28 00:35:26,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914948348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:26,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:26,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371647149] [2024-06-28 00:35:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:26,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:26,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 242 transitions, 3897 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) [2024-06-28 00:35:26,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:26,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:26,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:27,356 INFO L124 PetriNetUnfolderBase]: 4956/8629 cut-off events. [2024-06-28 00:35:27,357 INFO L125 PetriNetUnfolderBase]: For 218840/218856 co-relation queries the response was YES. [2024-06-28 00:35:27,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49291 conditions, 8629 events. 4956/8629 cut-off events. For 218840/218856 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 68139 event pairs, 2021 based on Foata normal form. 18/8469 useless extension candidates. Maximal degree in co-relation 49192. Up to 6976 conditions per place. [2024-06-28 00:35:27,454 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 204 selfloop transitions, 50 changer transitions 0/266 dead transitions. [2024-06-28 00:35:27,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 266 transitions, 4599 flow [2024-06-28 00:35:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-28 00:35:27,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2024-06-28 00:35:27,455 INFO L175 Difference]: Start difference. First operand has 205 places, 242 transitions, 3897 flow. Second operand 6 states and 163 transitions. [2024-06-28 00:35:27,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 266 transitions, 4599 flow [2024-06-28 00:35:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 266 transitions, 4468 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 00:35:28,053 INFO L231 Difference]: Finished difference. Result has 207 places, 245 transitions, 3944 flow [2024-06-28 00:35:28,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3944, PETRI_PLACES=207, PETRI_TRANSITIONS=245} [2024-06-28 00:35:28,054 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 152 predicate places. [2024-06-28 00:35:28,054 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 245 transitions, 3944 flow [2024-06-28 00:35:28,054 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) [2024-06-28 00:35:28,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:28,054 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] [2024-06-28 00:35:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:35:28,055 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:28,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1506051009, now seen corresponding path program 1 times [2024-06-28 00:35:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:28,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420271412] [2024-06-28 00:35:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:28,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:28,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420271412] [2024-06-28 00:35:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420271412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:28,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:28,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:28,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267495700] [2024-06-28 00:35:28,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:28,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:28,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:28,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:28,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:28,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-28 00:35:28,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 245 transitions, 3944 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:28,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:28,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-28 00:35:28,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:29,765 INFO L124 PetriNetUnfolderBase]: 4658/8215 cut-off events. [2024-06-28 00:35:29,765 INFO L125 PetriNetUnfolderBase]: For 229572/229666 co-relation queries the response was YES. [2024-06-28 00:35:29,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47093 conditions, 8215 events. 4658/8215 cut-off events. For 229572/229666 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 64894 event pairs, 1578 based on Foata normal form. 78/8130 useless extension candidates. Maximal degree in co-relation 46993. Up to 5631 conditions per place. [2024-06-28 00:35:29,855 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 173 selfloop transitions, 59 changer transitions 0/272 dead transitions. [2024-06-28 00:35:29,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 272 transitions, 4632 flow [2024-06-28 00:35:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:35:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:35:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 00:35:29,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-28 00:35:29,856 INFO L175 Difference]: Start difference. First operand has 207 places, 245 transitions, 3944 flow. Second operand 5 states and 146 transitions. [2024-06-28 00:35:29,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 272 transitions, 4632 flow [2024-06-28 00:35:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 272 transitions, 4510 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:30,451 INFO L231 Difference]: Finished difference. Result has 209 places, 248 transitions, 4003 flow [2024-06-28 00:35:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4003, PETRI_PLACES=209, PETRI_TRANSITIONS=248} [2024-06-28 00:35:30,451 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-06-28 00:35:30,451 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 248 transitions, 4003 flow [2024-06-28 00:35:30,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:30,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:30,452 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, 1] [2024-06-28 00:35:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:35:30,452 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:30,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1385637008, now seen corresponding path program 1 times [2024-06-28 00:35:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:30,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272047164] [2024-06-28 00:35:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:30,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:30,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272047164] [2024-06-28 00:35:30,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272047164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:30,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:30,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348013278] [2024-06-28 00:35:30,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:30,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:30,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:30,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:30,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 248 transitions, 4003 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:30,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:30,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:30,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:32,143 INFO L124 PetriNetUnfolderBase]: 5383/9426 cut-off events. [2024-06-28 00:35:32,143 INFO L125 PetriNetUnfolderBase]: For 270493/270495 co-relation queries the response was YES. [2024-06-28 00:35:32,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55392 conditions, 9426 events. 5383/9426 cut-off events. For 270493/270495 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 75838 event pairs, 1002 based on Foata normal form. 12/9287 useless extension candidates. Maximal degree in co-relation 55290. Up to 6384 conditions per place. [2024-06-28 00:35:32,233 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 206 selfloop transitions, 91 changer transitions 0/309 dead transitions. [2024-06-28 00:35:32,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 309 transitions, 5157 flow [2024-06-28 00:35:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 00:35:32,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-28 00:35:32,234 INFO L175 Difference]: Start difference. First operand has 209 places, 248 transitions, 4003 flow. Second operand 6 states and 187 transitions. [2024-06-28 00:35:32,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 309 transitions, 5157 flow [2024-06-28 00:35:33,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 309 transitions, 5060 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:33,030 INFO L231 Difference]: Finished difference. Result has 214 places, 266 transitions, 4501 flow [2024-06-28 00:35:33,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4501, PETRI_PLACES=214, PETRI_TRANSITIONS=266} [2024-06-28 00:35:33,030 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 159 predicate places. [2024-06-28 00:35:33,030 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 266 transitions, 4501 flow [2024-06-28 00:35:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:33,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:33,031 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, 1] [2024-06-28 00:35:33,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:35:33,031 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:33,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash -895337374, now seen corresponding path program 2 times [2024-06-28 00:35:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:33,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168587748] [2024-06-28 00:35:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:33,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:33,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:33,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168587748] [2024-06-28 00:35:33,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168587748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:33,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:33,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642724440] [2024-06-28 00:35:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:33,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:33,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:33,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 266 transitions, 4501 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:33,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:33,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:33,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:34,797 INFO L124 PetriNetUnfolderBase]: 5352/9281 cut-off events. [2024-06-28 00:35:34,797 INFO L125 PetriNetUnfolderBase]: For 284323/284325 co-relation queries the response was YES. [2024-06-28 00:35:34,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56115 conditions, 9281 events. 5352/9281 cut-off events. For 284323/284325 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 73125 event pairs, 1611 based on Foata normal form. 12/9153 useless extension candidates. Maximal degree in co-relation 56010. Up to 6372 conditions per place. [2024-06-28 00:35:34,905 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 194 selfloop transitions, 112 changer transitions 0/318 dead transitions. [2024-06-28 00:35:34,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 5467 flow [2024-06-28 00:35:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-28 00:35:34,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5600961538461539 [2024-06-28 00:35:34,906 INFO L175 Difference]: Start difference. First operand has 214 places, 266 transitions, 4501 flow. Second operand 8 states and 233 transitions. [2024-06-28 00:35:34,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 5467 flow [2024-06-28 00:35:35,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 318 transitions, 5342 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:35,663 INFO L231 Difference]: Finished difference. Result has 219 places, 270 transitions, 4726 flow [2024-06-28 00:35:35,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4384, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4726, PETRI_PLACES=219, PETRI_TRANSITIONS=270} [2024-06-28 00:35:35,664 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2024-06-28 00:35:35,664 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 270 transitions, 4726 flow [2024-06-28 00:35:35,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:35,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:35,664 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, 1] [2024-06-28 00:35:35,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:35:35,664 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:35,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash 648080358, now seen corresponding path program 3 times [2024-06-28 00:35:35,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:35,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137489618] [2024-06-28 00:35:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:35,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:35,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:35,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137489618] [2024-06-28 00:35:35,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137489618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:35,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853716453] [2024-06-28 00:35:35,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:35,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:35,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:35,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:35,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 270 transitions, 4726 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:35,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:35,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:35,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:37,426 INFO L124 PetriNetUnfolderBase]: 5456/9559 cut-off events. [2024-06-28 00:35:37,426 INFO L125 PetriNetUnfolderBase]: For 293024/293024 co-relation queries the response was YES. [2024-06-28 00:35:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58272 conditions, 9559 events. 5456/9559 cut-off events. For 293024/293024 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 77122 event pairs, 1299 based on Foata normal form. 4/9378 useless extension candidates. Maximal degree in co-relation 58166. Up to 6751 conditions per place. [2024-06-28 00:35:37,533 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 266 selfloop transitions, 65 changer transitions 0/343 dead transitions. [2024-06-28 00:35:37,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 343 transitions, 6009 flow [2024-06-28 00:35:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-28 00:35:37,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721153846153846 [2024-06-28 00:35:37,534 INFO L175 Difference]: Start difference. First operand has 219 places, 270 transitions, 4726 flow. Second operand 8 states and 238 transitions. [2024-06-28 00:35:37,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 343 transitions, 6009 flow [2024-06-28 00:35:38,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 343 transitions, 5706 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-28 00:35:38,332 INFO L231 Difference]: Finished difference. Result has 223 places, 277 transitions, 4787 flow [2024-06-28 00:35:38,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4787, PETRI_PLACES=223, PETRI_TRANSITIONS=277} [2024-06-28 00:35:38,332 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 168 predicate places. [2024-06-28 00:35:38,332 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 277 transitions, 4787 flow [2024-06-28 00:35:38,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:38,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:38,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:38,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:35:38,333 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:38,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:38,333 INFO L85 PathProgramCache]: Analyzing trace with hash 392423388, now seen corresponding path program 4 times [2024-06-28 00:35:38,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:38,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612340723] [2024-06-28 00:35:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:38,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:38,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:38,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612340723] [2024-06-28 00:35:38,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612340723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:38,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:38,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:38,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891000662] [2024-06-28 00:35:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:38,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:38,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:38,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:38,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:38,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:38,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 277 transitions, 4787 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:38,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:38,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:38,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:40,085 INFO L124 PetriNetUnfolderBase]: 5476/9559 cut-off events. [2024-06-28 00:35:40,085 INFO L125 PetriNetUnfolderBase]: For 276324/276324 co-relation queries the response was YES. [2024-06-28 00:35:40,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57632 conditions, 9559 events. 5476/9559 cut-off events. For 276324/276324 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 76811 event pairs, 1334 based on Foata normal form. 4/9357 useless extension candidates. Maximal degree in co-relation 57524. Up to 6759 conditions per place. [2024-06-28 00:35:40,189 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 253 selfloop transitions, 70 changer transitions 0/335 dead transitions. [2024-06-28 00:35:40,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 335 transitions, 5811 flow [2024-06-28 00:35:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-28 00:35:40,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504807692307693 [2024-06-28 00:35:40,191 INFO L175 Difference]: Start difference. First operand has 223 places, 277 transitions, 4787 flow. Second operand 8 states and 229 transitions. [2024-06-28 00:35:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 335 transitions, 5811 flow [2024-06-28 00:35:40,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 335 transitions, 5744 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:40,768 INFO L231 Difference]: Finished difference. Result has 229 places, 281 transitions, 4968 flow [2024-06-28 00:35:40,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4968, PETRI_PLACES=229, PETRI_TRANSITIONS=281} [2024-06-28 00:35:40,769 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2024-06-28 00:35:40,769 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 281 transitions, 4968 flow [2024-06-28 00:35:40,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:40,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:40,769 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, 1] [2024-06-28 00:35:40,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:35:40,769 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:40,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1085159629, now seen corresponding path program 1 times [2024-06-28 00:35:40,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:40,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113821781] [2024-06-28 00:35:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:41,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113821781] [2024-06-28 00:35:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113821781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:41,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:41,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:41,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157187312] [2024-06-28 00:35:41,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:41,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:41,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 281 transitions, 4968 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:41,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:41,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:41,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:42,738 INFO L124 PetriNetUnfolderBase]: 5484/9602 cut-off events. [2024-06-28 00:35:42,738 INFO L125 PetriNetUnfolderBase]: For 294264/294283 co-relation queries the response was YES. [2024-06-28 00:35:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58627 conditions, 9602 events. 5484/9602 cut-off events. For 294264/294283 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 77483 event pairs, 1802 based on Foata normal form. 22/9427 useless extension candidates. Maximal degree in co-relation 58517. Up to 7691 conditions per place. [2024-06-28 00:35:42,841 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 253 selfloop transitions, 54 changer transitions 0/319 dead transitions. [2024-06-28 00:35:42,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 319 transitions, 5814 flow [2024-06-28 00:35:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-28 00:35:42,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-28 00:35:42,847 INFO L175 Difference]: Start difference. First operand has 229 places, 281 transitions, 4968 flow. Second operand 8 states and 215 transitions. [2024-06-28 00:35:42,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 319 transitions, 5814 flow [2024-06-28 00:35:43,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 319 transitions, 5704 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:43,553 INFO L231 Difference]: Finished difference. Result has 234 places, 283 transitions, 5029 flow [2024-06-28 00:35:43,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5029, PETRI_PLACES=234, PETRI_TRANSITIONS=283} [2024-06-28 00:35:43,554 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-28 00:35:43,554 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 283 transitions, 5029 flow [2024-06-28 00:35:43,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:43,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:43,554 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, 1] [2024-06-28 00:35:43,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:35:43,555 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:43,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash -6022301, now seen corresponding path program 2 times [2024-06-28 00:35:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:43,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571778529] [2024-06-28 00:35:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:43,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:43,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:43,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571778529] [2024-06-28 00:35:43,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571778529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:43,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:43,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443237992] [2024-06-28 00:35:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:43,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:43,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:43,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:43,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 283 transitions, 5029 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:43,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:43,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:43,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:45,498 INFO L124 PetriNetUnfolderBase]: 5524/9670 cut-off events. [2024-06-28 00:35:45,499 INFO L125 PetriNetUnfolderBase]: For 301917/301936 co-relation queries the response was YES. [2024-06-28 00:35:45,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59186 conditions, 9670 events. 5524/9670 cut-off events. For 301917/301936 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 77948 event pairs, 1806 based on Foata normal form. 18/9491 useless extension candidates. Maximal degree in co-relation 59075. Up to 7723 conditions per place. [2024-06-28 00:35:45,613 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 250 selfloop transitions, 60 changer transitions 0/322 dead transitions. [2024-06-28 00:35:45,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 5940 flow [2024-06-28 00:35:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-28 00:35:45,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-28 00:35:45,615 INFO L175 Difference]: Start difference. First operand has 234 places, 283 transitions, 5029 flow. Second operand 8 states and 214 transitions. [2024-06-28 00:35:45,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 5940 flow [2024-06-28 00:35:46,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 322 transitions, 5786 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 00:35:46,568 INFO L231 Difference]: Finished difference. Result has 238 places, 287 transitions, 5123 flow [2024-06-28 00:35:46,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5123, PETRI_PLACES=238, PETRI_TRANSITIONS=287} [2024-06-28 00:35:46,568 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-06-28 00:35:46,568 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 287 transitions, 5123 flow [2024-06-28 00:35:46,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:46,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:46,568 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, 1] [2024-06-28 00:35:46,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:35:46,569 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:46,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1715680585, now seen corresponding path program 3 times [2024-06-28 00:35:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:46,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618660450] [2024-06-28 00:35:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:46,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:46,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618660450] [2024-06-28 00:35:46,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618660450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:46,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:46,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844226416] [2024-06-28 00:35:46,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:46,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:46,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:46,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:46,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:46,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 287 transitions, 5123 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:46,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:46,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:46,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:48,582 INFO L124 PetriNetUnfolderBase]: 5512/9656 cut-off events. [2024-06-28 00:35:48,582 INFO L125 PetriNetUnfolderBase]: For 305626/305645 co-relation queries the response was YES. [2024-06-28 00:35:48,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58941 conditions, 9656 events. 5512/9656 cut-off events. For 305626/305645 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 78124 event pairs, 1796 based on Foata normal form. 18/9479 useless extension candidates. Maximal degree in co-relation 58829. Up to 7715 conditions per place. [2024-06-28 00:35:48,700 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 246 selfloop transitions, 62 changer transitions 0/320 dead transitions. [2024-06-28 00:35:48,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 320 transitions, 5835 flow [2024-06-28 00:35:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-28 00:35:48,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-28 00:35:48,701 INFO L175 Difference]: Start difference. First operand has 238 places, 287 transitions, 5123 flow. Second operand 8 states and 212 transitions. [2024-06-28 00:35:48,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 320 transitions, 5835 flow [2024-06-28 00:35:49,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 320 transitions, 5695 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:49,516 INFO L231 Difference]: Finished difference. Result has 240 places, 287 transitions, 5130 flow [2024-06-28 00:35:49,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5130, PETRI_PLACES=240, PETRI_TRANSITIONS=287} [2024-06-28 00:35:49,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-28 00:35:49,516 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 287 transitions, 5130 flow [2024-06-28 00:35:49,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:49,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:49,517 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, 1] [2024-06-28 00:35:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:35:49,517 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:49,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1141071106, now seen corresponding path program 5 times [2024-06-28 00:35:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:49,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311043029] [2024-06-28 00:35:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:49,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:49,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:49,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311043029] [2024-06-28 00:35:49,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311043029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:49,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:49,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:49,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440149531] [2024-06-28 00:35:49,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:49,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:49,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:49,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:49,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 287 transitions, 5130 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:49,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:49,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:49,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:51,319 INFO L124 PetriNetUnfolderBase]: 5500/9563 cut-off events. [2024-06-28 00:35:51,319 INFO L125 PetriNetUnfolderBase]: For 307270/307270 co-relation queries the response was YES. [2024-06-28 00:35:51,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58576 conditions, 9563 events. 5500/9563 cut-off events. For 307270/307270 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 76490 event pairs, 1429 based on Foata normal form. 4/9355 useless extension candidates. Maximal degree in co-relation 58464. Up to 6779 conditions per place. [2024-06-28 00:35:51,434 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 235 selfloop transitions, 79 changer transitions 0/326 dead transitions. [2024-06-28 00:35:51,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 326 transitions, 6047 flow [2024-06-28 00:35:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-28 00:35:51,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2024-06-28 00:35:51,435 INFO L175 Difference]: Start difference. First operand has 240 places, 287 transitions, 5130 flow. Second operand 7 states and 192 transitions. [2024-06-28 00:35:51,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 326 transitions, 6047 flow [2024-06-28 00:35:52,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 326 transitions, 5918 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:35:52,217 INFO L231 Difference]: Finished difference. Result has 242 places, 294 transitions, 5353 flow [2024-06-28 00:35:52,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5003, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5353, PETRI_PLACES=242, PETRI_TRANSITIONS=294} [2024-06-28 00:35:52,217 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-28 00:35:52,217 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 294 transitions, 5353 flow [2024-06-28 00:35:52,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:52,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:52,218 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, 1] [2024-06-28 00:35:52,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:35:52,218 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:52,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2052996543, now seen corresponding path program 4 times [2024-06-28 00:35:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915914370] [2024-06-28 00:35:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:52,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:52,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915914370] [2024-06-28 00:35:52,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915914370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:52,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:52,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:52,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737119941] [2024-06-28 00:35:52,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:52,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:52,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:52,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:52,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 294 transitions, 5353 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:52,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:52,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:54,534 INFO L124 PetriNetUnfolderBase]: 5552/9708 cut-off events. [2024-06-28 00:35:54,535 INFO L125 PetriNetUnfolderBase]: For 308680/308699 co-relation queries the response was YES. [2024-06-28 00:35:54,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59921 conditions, 9708 events. 5552/9708 cut-off events. For 308680/308699 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 78364 event pairs, 1809 based on Foata normal form. 18/9518 useless extension candidates. Maximal degree in co-relation 59807. Up to 7644 conditions per place. [2024-06-28 00:35:54,628 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 256 selfloop transitions, 69 changer transitions 0/337 dead transitions. [2024-06-28 00:35:54,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 337 transitions, 6351 flow [2024-06-28 00:35:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-28 00:35:54,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-28 00:35:54,630 INFO L175 Difference]: Start difference. First operand has 242 places, 294 transitions, 5353 flow. Second operand 8 states and 216 transitions. [2024-06-28 00:35:54,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 337 transitions, 6351 flow [2024-06-28 00:35:55,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 337 transitions, 6251 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 00:35:55,334 INFO L231 Difference]: Finished difference. Result has 248 places, 298 transitions, 5472 flow [2024-06-28 00:35:55,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5253, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5472, PETRI_PLACES=248, PETRI_TRANSITIONS=298} [2024-06-28 00:35:55,335 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 193 predicate places. [2024-06-28 00:35:55,335 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 298 transitions, 5472 flow [2024-06-28 00:35:55,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:55,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:55,335 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, 1] [2024-06-28 00:35:55,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:35:55,335 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:55,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:55,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1517283074, now seen corresponding path program 6 times [2024-06-28 00:35:55,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:55,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257137565] [2024-06-28 00:35:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:55,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:55,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:55,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257137565] [2024-06-28 00:35:55,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257137565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:55,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:55,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:55,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252237899] [2024-06-28 00:35:55,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:55,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:55,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:55,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:55,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:55,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 298 transitions, 5472 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:55,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:55,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:55,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:57,265 INFO L124 PetriNetUnfolderBase]: 5572/9714 cut-off events. [2024-06-28 00:35:57,266 INFO L125 PetriNetUnfolderBase]: For 323886/323892 co-relation queries the response was YES. [2024-06-28 00:35:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60242 conditions, 9714 events. 5572/9714 cut-off events. For 323886/323892 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 78154 event pairs, 1383 based on Foata normal form. 5/9485 useless extension candidates. Maximal degree in co-relation 60127. Up to 6482 conditions per place. [2024-06-28 00:35:57,384 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 237 selfloop transitions, 84 changer transitions 0/333 dead transitions. [2024-06-28 00:35:57,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 333 transitions, 6402 flow [2024-06-28 00:35:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:35:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:35:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 00:35:57,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-28 00:35:57,385 INFO L175 Difference]: Start difference. First operand has 248 places, 298 transitions, 5472 flow. Second operand 7 states and 187 transitions. [2024-06-28 00:35:57,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 333 transitions, 6402 flow [2024-06-28 00:35:58,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 6238 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:35:58,203 INFO L231 Difference]: Finished difference. Result has 251 places, 302 transitions, 5598 flow [2024-06-28 00:35:58,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5308, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5598, PETRI_PLACES=251, PETRI_TRANSITIONS=302} [2024-06-28 00:35:58,203 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-06-28 00:35:58,203 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 302 transitions, 5598 flow [2024-06-28 00:35:58,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:58,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:58,204 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, 1] [2024-06-28 00:35:58,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:35:58,204 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:35:58,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash 11731149, now seen corresponding path program 5 times [2024-06-28 00:35:58,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:58,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826593611] [2024-06-28 00:35:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:58,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:58,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:58,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826593611] [2024-06-28 00:35:58,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826593611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:58,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:58,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:35:58,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277253871] [2024-06-28 00:35:58,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:58,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:35:58,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:35:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:35:58,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:35:58,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 302 transitions, 5598 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:58,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:58,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:35:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:00,272 INFO L124 PetriNetUnfolderBase]: 5560/9720 cut-off events. [2024-06-28 00:36:00,272 INFO L125 PetriNetUnfolderBase]: For 331130/331149 co-relation queries the response was YES. [2024-06-28 00:36:00,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60936 conditions, 9720 events. 5560/9720 cut-off events. For 331130/331149 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 78436 event pairs, 1817 based on Foata normal form. 18/9528 useless extension candidates. Maximal degree in co-relation 60819. Up to 7664 conditions per place. [2024-06-28 00:36:00,389 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 259 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-28 00:36:00,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 336 transitions, 6430 flow [2024-06-28 00:36:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-28 00:36:00,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-28 00:36:00,390 INFO L175 Difference]: Start difference. First operand has 251 places, 302 transitions, 5598 flow. Second operand 6 states and 174 transitions. [2024-06-28 00:36:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 336 transitions, 6430 flow [2024-06-28 00:36:01,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 336 transitions, 6297 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 00:36:01,240 INFO L231 Difference]: Finished difference. Result has 254 places, 302 transitions, 5605 flow [2024-06-28 00:36:01,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5605, PETRI_PLACES=254, PETRI_TRANSITIONS=302} [2024-06-28 00:36:01,240 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 199 predicate places. [2024-06-28 00:36:01,240 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 302 transitions, 5605 flow [2024-06-28 00:36:01,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:01,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:01,240 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, 1] [2024-06-28 00:36:01,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:36:01,241 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:01,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1083972794, now seen corresponding path program 7 times [2024-06-28 00:36:01,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:01,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209871054] [2024-06-28 00:36:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:01,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:01,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:01,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209871054] [2024-06-28 00:36:01,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209871054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:01,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:01,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248390318] [2024-06-28 00:36:01,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:01,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:01,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 302 transitions, 5605 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:01,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:01,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:01,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:03,246 INFO L124 PetriNetUnfolderBase]: 5536/9686 cut-off events. [2024-06-28 00:36:03,246 INFO L125 PetriNetUnfolderBase]: For 342200/342212 co-relation queries the response was YES. [2024-06-28 00:36:03,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60168 conditions, 9686 events. 5536/9686 cut-off events. For 342200/342212 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 78260 event pairs, 1765 based on Foata normal form. 15/9462 useless extension candidates. Maximal degree in co-relation 60049. Up to 7496 conditions per place. [2024-06-28 00:36:03,350 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 248 selfloop transitions, 71 changer transitions 0/331 dead transitions. [2024-06-28 00:36:03,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 331 transitions, 6473 flow [2024-06-28 00:36:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 00:36:03,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-28 00:36:03,352 INFO L175 Difference]: Start difference. First operand has 254 places, 302 transitions, 5605 flow. Second operand 7 states and 183 transitions. [2024-06-28 00:36:03,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 331 transitions, 6473 flow [2024-06-28 00:36:04,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 331 transitions, 6323 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:04,196 INFO L231 Difference]: Finished difference. Result has 257 places, 309 transitions, 5762 flow [2024-06-28 00:36:04,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5456, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5762, PETRI_PLACES=257, PETRI_TRANSITIONS=309} [2024-06-28 00:36:04,197 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-06-28 00:36:04,197 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 309 transitions, 5762 flow [2024-06-28 00:36:04,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:04,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:04,198 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, 1] [2024-06-28 00:36:04,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:36:04,198 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:04,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:04,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1993523357, now seen corresponding path program 6 times [2024-06-28 00:36:04,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931479258] [2024-06-28 00:36:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:04,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931479258] [2024-06-28 00:36:04,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931479258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:04,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:04,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:04,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517651741] [2024-06-28 00:36:04,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:04,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:04,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:04,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:04,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 309 transitions, 5762 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:04,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:04,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:04,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:06,221 INFO L124 PetriNetUnfolderBase]: 5556/9690 cut-off events. [2024-06-28 00:36:06,222 INFO L125 PetriNetUnfolderBase]: For 344533/344612 co-relation queries the response was YES. [2024-06-28 00:36:06,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60825 conditions, 9690 events. 5556/9690 cut-off events. For 344533/344612 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 78277 event pairs, 1830 based on Foata normal form. 70/9561 useless extension candidates. Maximal degree in co-relation 60705. Up to 7648 conditions per place. [2024-06-28 00:36:06,341 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 257 selfloop transitions, 68 changer transitions 0/337 dead transitions. [2024-06-28 00:36:06,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 337 transitions, 6613 flow [2024-06-28 00:36:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-28 00:36:06,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-28 00:36:06,342 INFO L175 Difference]: Start difference. First operand has 257 places, 309 transitions, 5762 flow. Second operand 6 states and 165 transitions. [2024-06-28 00:36:06,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 337 transitions, 6613 flow [2024-06-28 00:36:07,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 337 transitions, 6384 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:07,359 INFO L231 Difference]: Finished difference. Result has 259 places, 311 transitions, 5716 flow [2024-06-28 00:36:07,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5716, PETRI_PLACES=259, PETRI_TRANSITIONS=311} [2024-06-28 00:36:07,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 204 predicate places. [2024-06-28 00:36:07,360 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 311 transitions, 5716 flow [2024-06-28 00:36:07,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:07,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:07,360 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, 1] [2024-06-28 00:36:07,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:36:07,360 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:07,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1073202679, now seen corresponding path program 7 times [2024-06-28 00:36:07,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:07,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022902078] [2024-06-28 00:36:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:07,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:07,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022902078] [2024-06-28 00:36:07,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022902078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:07,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:07,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:07,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729470879] [2024-06-28 00:36:07,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:07,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:07,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:07,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:07,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:07,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:07,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 311 transitions, 5716 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:07,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:07,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:07,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:09,450 INFO L124 PetriNetUnfolderBase]: 5544/9672 cut-off events. [2024-06-28 00:36:09,451 INFO L125 PetriNetUnfolderBase]: For 346850/346929 co-relation queries the response was YES. [2024-06-28 00:36:09,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60296 conditions, 9672 events. 5544/9672 cut-off events. For 346850/346929 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 78187 event pairs, 1846 based on Foata normal form. 70/9543 useless extension candidates. Maximal degree in co-relation 60175. Up to 7640 conditions per place. [2024-06-28 00:36:09,571 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 256 selfloop transitions, 68 changer transitions 0/336 dead transitions. [2024-06-28 00:36:09,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 336 transitions, 6436 flow [2024-06-28 00:36:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-28 00:36:09,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-28 00:36:09,572 INFO L175 Difference]: Start difference. First operand has 259 places, 311 transitions, 5716 flow. Second operand 6 states and 164 transitions. [2024-06-28 00:36:09,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 336 transitions, 6436 flow [2024-06-28 00:36:10,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 336 transitions, 6225 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:10,464 INFO L231 Difference]: Finished difference. Result has 260 places, 311 transitions, 5650 flow [2024-06-28 00:36:10,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5505, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5650, PETRI_PLACES=260, PETRI_TRANSITIONS=311} [2024-06-28 00:36:10,465 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2024-06-28 00:36:10,465 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 311 transitions, 5650 flow [2024-06-28 00:36:10,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:10,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:10,465 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, 1] [2024-06-28 00:36:10,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:36:10,465 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:10,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:10,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2050003574, now seen corresponding path program 8 times [2024-06-28 00:36:10,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:10,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328591318] [2024-06-28 00:36:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:10,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:10,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:10,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328591318] [2024-06-28 00:36:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328591318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263657009] [2024-06-28 00:36:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:10,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:10,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:10,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:10,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:10,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 311 transitions, 5650 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:10,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:10,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:12,365 INFO L124 PetriNetUnfolderBase]: 5564/9580 cut-off events. [2024-06-28 00:36:12,365 INFO L125 PetriNetUnfolderBase]: For 354052/354072 co-relation queries the response was YES. [2024-06-28 00:36:12,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60001 conditions, 9580 events. 5564/9580 cut-off events. For 354052/354072 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 76557 event pairs, 1714 based on Foata normal form. 7/9342 useless extension candidates. Maximal degree in co-relation 59881. Up to 6470 conditions per place. [2024-06-28 00:36:12,479 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 232 selfloop transitions, 97 changer transitions 0/341 dead transitions. [2024-06-28 00:36:12,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 341 transitions, 6683 flow [2024-06-28 00:36:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 00:36:12,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-28 00:36:12,480 INFO L175 Difference]: Start difference. First operand has 260 places, 311 transitions, 5650 flow. Second operand 7 states and 180 transitions. [2024-06-28 00:36:12,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 341 transitions, 6683 flow [2024-06-28 00:36:13,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 341 transitions, 6548 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:13,236 INFO L231 Difference]: Finished difference. Result has 264 places, 318 transitions, 5889 flow [2024-06-28 00:36:13,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5889, PETRI_PLACES=264, PETRI_TRANSITIONS=318} [2024-06-28 00:36:13,237 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 209 predicate places. [2024-06-28 00:36:13,237 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 318 transitions, 5889 flow [2024-06-28 00:36:13,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:13,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:13,237 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, 1] [2024-06-28 00:36:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:36:13,237 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:13,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1260039396, now seen corresponding path program 9 times [2024-06-28 00:36:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:13,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854361632] [2024-06-28 00:36:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:13,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:13,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854361632] [2024-06-28 00:36:13,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854361632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:13,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:13,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621504461] [2024-06-28 00:36:13,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:13,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:13,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:13,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:13,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:13,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 318 transitions, 5889 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:13,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:13,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:13,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:15,307 INFO L124 PetriNetUnfolderBase]: 5552/9569 cut-off events. [2024-06-28 00:36:15,307 INFO L125 PetriNetUnfolderBase]: For 353242/353262 co-relation queries the response was YES. [2024-06-28 00:36:15,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60290 conditions, 9569 events. 5552/9569 cut-off events. For 353242/353262 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 76431 event pairs, 1712 based on Foata normal form. 7/9330 useless extension candidates. Maximal degree in co-relation 60168. Up to 6466 conditions per place. [2024-06-28 00:36:15,409 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 228 selfloop transitions, 99 changer transitions 0/339 dead transitions. [2024-06-28 00:36:15,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 339 transitions, 6683 flow [2024-06-28 00:36:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 00:36:15,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-28 00:36:15,410 INFO L175 Difference]: Start difference. First operand has 264 places, 318 transitions, 5889 flow. Second operand 7 states and 178 transitions. [2024-06-28 00:36:15,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 339 transitions, 6683 flow [2024-06-28 00:36:16,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 339 transitions, 6538 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-28 00:36:16,173 INFO L231 Difference]: Finished difference. Result has 270 places, 318 transitions, 5947 flow [2024-06-28 00:36:16,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5947, PETRI_PLACES=270, PETRI_TRANSITIONS=318} [2024-06-28 00:36:16,174 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2024-06-28 00:36:16,174 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 318 transitions, 5947 flow [2024-06-28 00:36:16,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:16,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:16,174 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, 1] [2024-06-28 00:36:16,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:36:16,175 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:16,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1301994111, now seen corresponding path program 1 times [2024-06-28 00:36:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:16,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065189939] [2024-06-28 00:36:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:16,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:16,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065189939] [2024-06-28 00:36:16,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065189939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:16,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:16,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:16,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621068545] [2024-06-28 00:36:16,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:16,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:16,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:16,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-28 00:36:16,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 318 transitions, 5947 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:16,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:16,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-28 00:36:16,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:18,409 INFO L124 PetriNetUnfolderBase]: 5184/9158 cut-off events. [2024-06-28 00:36:18,409 INFO L125 PetriNetUnfolderBase]: For 359717/359827 co-relation queries the response was YES. [2024-06-28 00:36:18,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58195 conditions, 9158 events. 5184/9158 cut-off events. For 359717/359827 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 74029 event pairs, 1629 based on Foata normal form. 90/9077 useless extension candidates. Maximal degree in co-relation 58070. Up to 6561 conditions per place. [2024-06-28 00:36:18,529 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 216 selfloop transitions, 74 changer transitions 0/342 dead transitions. [2024-06-28 00:36:18,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 342 transitions, 6712 flow [2024-06-28 00:36:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:36:18,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 00:36:18,530 INFO L175 Difference]: Start difference. First operand has 270 places, 318 transitions, 5947 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:36:18,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 342 transitions, 6712 flow [2024-06-28 00:36:19,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 342 transitions, 6543 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:19,519 INFO L231 Difference]: Finished difference. Result has 273 places, 319 transitions, 5988 flow [2024-06-28 00:36:19,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5778, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5988, PETRI_PLACES=273, PETRI_TRANSITIONS=319} [2024-06-28 00:36:19,520 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 218 predicate places. [2024-06-28 00:36:19,520 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 319 transitions, 5988 flow [2024-06-28 00:36:19,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:19,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:19,521 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, 1] [2024-06-28 00:36:19,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:36:19,521 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:19,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1694195951, now seen corresponding path program 1 times [2024-06-28 00:36:19,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:19,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338277004] [2024-06-28 00:36:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:19,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:19,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338277004] [2024-06-28 00:36:19,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338277004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:19,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:19,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:19,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943611880] [2024-06-28 00:36:19,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:19,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:19,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:19,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:19,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 319 transitions, 5988 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:19,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:19,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:19,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:21,527 INFO L124 PetriNetUnfolderBase]: 5761/10060 cut-off events. [2024-06-28 00:36:21,527 INFO L125 PetriNetUnfolderBase]: For 392601/392620 co-relation queries the response was YES. [2024-06-28 00:36:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64131 conditions, 10060 events. 5761/10060 cut-off events. For 392601/392620 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 81565 event pairs, 1472 based on Foata normal form. 22/9904 useless extension candidates. Maximal degree in co-relation 64004. Up to 7239 conditions per place. [2024-06-28 00:36:21,657 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 309 selfloop transitions, 55 changer transitions 0/376 dead transitions. [2024-06-28 00:36:21,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 376 transitions, 7139 flow [2024-06-28 00:36:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-28 00:36:21,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408653846153846 [2024-06-28 00:36:21,658 INFO L175 Difference]: Start difference. First operand has 273 places, 319 transitions, 5988 flow. Second operand 8 states and 225 transitions. [2024-06-28 00:36:21,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 376 transitions, 7139 flow [2024-06-28 00:36:22,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 376 transitions, 6957 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:22,724 INFO L231 Difference]: Finished difference. Result has 278 places, 324 transitions, 6068 flow [2024-06-28 00:36:22,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5814, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6068, PETRI_PLACES=278, PETRI_TRANSITIONS=324} [2024-06-28 00:36:22,725 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 223 predicate places. [2024-06-28 00:36:22,725 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 324 transitions, 6068 flow [2024-06-28 00:36:22,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:22,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:22,725 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, 1] [2024-06-28 00:36:22,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:36:22,725 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:22,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:22,725 INFO L85 PathProgramCache]: Analyzing trace with hash -165062099, now seen corresponding path program 1 times [2024-06-28 00:36:22,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:22,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210464312] [2024-06-28 00:36:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:22,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:22,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210464312] [2024-06-28 00:36:22,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210464312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:22,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:22,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:22,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939848188] [2024-06-28 00:36:22,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:22,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:22,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:22,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:22,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 324 transitions, 6068 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:22,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:22,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:22,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:24,946 INFO L124 PetriNetUnfolderBase]: 5781/10084 cut-off events. [2024-06-28 00:36:24,946 INFO L125 PetriNetUnfolderBase]: For 381833/381835 co-relation queries the response was YES. [2024-06-28 00:36:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64247 conditions, 10084 events. 5781/10084 cut-off events. For 381833/381835 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 82059 event pairs, 2039 based on Foata normal form. 6/9870 useless extension candidates. Maximal degree in co-relation 64118. Up to 8123 conditions per place. [2024-06-28 00:36:25,082 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 302 selfloop transitions, 50 changer transitions 0/364 dead transitions. [2024-06-28 00:36:25,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 364 transitions, 7090 flow [2024-06-28 00:36:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-28 00:36:25,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467032967032966 [2024-06-28 00:36:25,083 INFO L175 Difference]: Start difference. First operand has 278 places, 324 transitions, 6068 flow. Second operand 7 states and 199 transitions. [2024-06-28 00:36:25,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 364 transitions, 7090 flow [2024-06-28 00:36:26,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 364 transitions, 6921 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:26,330 INFO L231 Difference]: Finished difference. Result has 281 places, 326 transitions, 6040 flow [2024-06-28 00:36:26,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6040, PETRI_PLACES=281, PETRI_TRANSITIONS=326} [2024-06-28 00:36:26,330 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 226 predicate places. [2024-06-28 00:36:26,330 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 326 transitions, 6040 flow [2024-06-28 00:36:26,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:26,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:26,331 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, 1] [2024-06-28 00:36:26,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:36:26,331 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:26,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -165062285, now seen corresponding path program 2 times [2024-06-28 00:36:26,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:26,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308294340] [2024-06-28 00:36:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:26,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:26,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:26,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308294340] [2024-06-28 00:36:26,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308294340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:26,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:26,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:26,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212932995] [2024-06-28 00:36:26,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:26,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:26,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:26,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:26,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 326 transitions, 6040 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:26,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:26,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:26,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:28,583 INFO L124 PetriNetUnfolderBase]: 5880/10251 cut-off events. [2024-06-28 00:36:28,583 INFO L125 PetriNetUnfolderBase]: For 410284/410303 co-relation queries the response was YES. [2024-06-28 00:36:28,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65781 conditions, 10251 events. 5880/10251 cut-off events. For 410284/410303 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 83181 event pairs, 1545 based on Foata normal form. 22/10105 useless extension candidates. Maximal degree in co-relation 65650. Up to 5685 conditions per place. [2024-06-28 00:36:28,692 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 294 selfloop transitions, 106 changer transitions 0/412 dead transitions. [2024-06-28 00:36:28,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 412 transitions, 8132 flow [2024-06-28 00:36:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 00:36:28,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:36:28,693 INFO L175 Difference]: Start difference. First operand has 281 places, 326 transitions, 6040 flow. Second operand 7 states and 208 transitions. [2024-06-28 00:36:28,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 412 transitions, 8132 flow [2024-06-28 00:36:29,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 412 transitions, 8008 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:29,769 INFO L231 Difference]: Finished difference. Result has 285 places, 343 transitions, 6563 flow [2024-06-28 00:36:29,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5916, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6563, PETRI_PLACES=285, PETRI_TRANSITIONS=343} [2024-06-28 00:36:29,770 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 230 predicate places. [2024-06-28 00:36:29,770 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 343 transitions, 6563 flow [2024-06-28 00:36:29,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:29,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:29,770 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, 1] [2024-06-28 00:36:29,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:36:29,770 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:29,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1516707125, now seen corresponding path program 2 times [2024-06-28 00:36:29,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:29,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579288564] [2024-06-28 00:36:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:29,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:29,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:29,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579288564] [2024-06-28 00:36:29,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579288564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:29,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:29,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:29,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049409125] [2024-06-28 00:36:29,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:29,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:29,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:29,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:29,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:29,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:29,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 343 transitions, 6563 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:29,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:29,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:29,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:31,929 INFO L124 PetriNetUnfolderBase]: 5932/10325 cut-off events. [2024-06-28 00:36:31,930 INFO L125 PetriNetUnfolderBase]: For 432845/432847 co-relation queries the response was YES. [2024-06-28 00:36:32,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68412 conditions, 10325 events. 5932/10325 cut-off events. For 432845/432847 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 84135 event pairs, 2054 based on Foata normal form. 6/10103 useless extension candidates. Maximal degree in co-relation 68278. Up to 8300 conditions per place. [2024-06-28 00:36:32,075 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 316 selfloop transitions, 55 changer transitions 0/383 dead transitions. [2024-06-28 00:36:32,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 383 transitions, 7669 flow [2024-06-28 00:36:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-28 00:36:32,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-28 00:36:32,076 INFO L175 Difference]: Start difference. First operand has 285 places, 343 transitions, 6563 flow. Second operand 8 states and 216 transitions. [2024-06-28 00:36:32,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 383 transitions, 7669 flow [2024-06-28 00:36:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 383 transitions, 7523 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-28 00:36:33,673 INFO L231 Difference]: Finished difference. Result has 292 places, 347 transitions, 6615 flow [2024-06-28 00:36:33,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6417, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6615, PETRI_PLACES=292, PETRI_TRANSITIONS=347} [2024-06-28 00:36:33,674 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 237 predicate places. [2024-06-28 00:36:33,674 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 347 transitions, 6615 flow [2024-06-28 00:36:33,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:33,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:33,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:33,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:36:33,674 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:33,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1516944461, now seen corresponding path program 3 times [2024-06-28 00:36:33,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:33,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449473534] [2024-06-28 00:36:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:33,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449473534] [2024-06-28 00:36:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449473534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:33,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:33,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250339202] [2024-06-28 00:36:33,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:33,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:33,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:33,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 347 transitions, 6615 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:33,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:33,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:33,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:35,941 INFO L124 PetriNetUnfolderBase]: 6129/10684 cut-off events. [2024-06-28 00:36:35,941 INFO L125 PetriNetUnfolderBase]: For 479947/479966 co-relation queries the response was YES. [2024-06-28 00:36:36,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70816 conditions, 10684 events. 6129/10684 cut-off events. For 479947/479966 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 87144 event pairs, 1645 based on Foata normal form. 22/10532 useless extension candidates. Maximal degree in co-relation 70680. Up to 5739 conditions per place. [2024-06-28 00:36:36,088 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 292 selfloop transitions, 117 changer transitions 0/421 dead transitions. [2024-06-28 00:36:36,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 421 transitions, 8632 flow [2024-06-28 00:36:36,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:36:36,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554945054945055 [2024-06-28 00:36:36,089 INFO L175 Difference]: Start difference. First operand has 292 places, 347 transitions, 6615 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:36:36,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 421 transitions, 8632 flow [2024-06-28 00:36:37,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 421 transitions, 8387 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:37,675 INFO L231 Difference]: Finished difference. Result has 295 places, 362 transitions, 7068 flow [2024-06-28 00:36:37,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7068, PETRI_PLACES=295, PETRI_TRANSITIONS=362} [2024-06-28 00:36:37,676 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 240 predicate places. [2024-06-28 00:36:37,676 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 362 transitions, 7068 flow [2024-06-28 00:36:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:37,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:37,677 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, 1, 1, 1] [2024-06-28 00:36:37,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:36:37,677 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:37,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash 231980271, now seen corresponding path program 4 times [2024-06-28 00:36:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:37,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153622139] [2024-06-28 00:36:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:37,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153622139] [2024-06-28 00:36:37,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153622139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:37,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:37,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:37,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370430863] [2024-06-28 00:36:37,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:37,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:37,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:37,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:37,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 362 transitions, 7068 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:37,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:37,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:37,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:40,114 INFO L124 PetriNetUnfolderBase]: 6385/11060 cut-off events. [2024-06-28 00:36:40,114 INFO L125 PetriNetUnfolderBase]: For 546855/546861 co-relation queries the response was YES. [2024-06-28 00:36:40,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75830 conditions, 11060 events. 6385/11060 cut-off events. For 546855/546861 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 90467 event pairs, 1003 based on Foata normal form. 17/10889 useless extension candidates. Maximal degree in co-relation 75692. Up to 7273 conditions per place. [2024-06-28 00:36:40,252 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 336 selfloop transitions, 62 changer transitions 0/410 dead transitions. [2024-06-28 00:36:40,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 410 transitions, 8299 flow [2024-06-28 00:36:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 00:36:40,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-28 00:36:40,253 INFO L175 Difference]: Start difference. First operand has 295 places, 362 transitions, 7068 flow. Second operand 7 states and 200 transitions. [2024-06-28 00:36:40,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 410 transitions, 8299 flow [2024-06-28 00:36:42,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 410 transitions, 8130 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-06-28 00:36:42,162 INFO L231 Difference]: Finished difference. Result has 302 places, 368 transitions, 7249 flow [2024-06-28 00:36:42,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6909, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7249, PETRI_PLACES=302, PETRI_TRANSITIONS=368} [2024-06-28 00:36:42,162 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 247 predicate places. [2024-06-28 00:36:42,162 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 368 transitions, 7249 flow [2024-06-28 00:36:42,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:42,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:42,163 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, 1] [2024-06-28 00:36:42,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:36:42,163 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:42,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2013709623, now seen corresponding path program 5 times [2024-06-28 00:36:42,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:42,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664764254] [2024-06-28 00:36:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:42,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:42,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:42,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664764254] [2024-06-28 00:36:42,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664764254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:42,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:42,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:42,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094061030] [2024-06-28 00:36:42,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:42,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:42,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:42,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:42,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 368 transitions, 7249 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:42,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:42,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:42,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:44,848 INFO L124 PetriNetUnfolderBase]: 6596/11385 cut-off events. [2024-06-28 00:36:44,848 INFO L125 PetriNetUnfolderBase]: For 609973/609979 co-relation queries the response was YES. [2024-06-28 00:36:44,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80499 conditions, 11385 events. 6596/11385 cut-off events. For 609973/609979 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 93089 event pairs, 1413 based on Foata normal form. 21/11220 useless extension candidates. Maximal degree in co-relation 80358. Up to 4667 conditions per place. [2024-06-28 00:36:44,987 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 258 selfloop transitions, 150 changer transitions 0/420 dead transitions. [2024-06-28 00:36:44,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 420 transitions, 9057 flow [2024-06-28 00:36:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:36:44,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 00:36:44,988 INFO L175 Difference]: Start difference. First operand has 302 places, 368 transitions, 7249 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:36:44,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 420 transitions, 9057 flow [2024-06-28 00:36:46,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 420 transitions, 8815 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-28 00:36:46,507 INFO L231 Difference]: Finished difference. Result has 306 places, 377 transitions, 7713 flow [2024-06-28 00:36:46,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7007, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7713, PETRI_PLACES=306, PETRI_TRANSITIONS=377} [2024-06-28 00:36:46,507 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 251 predicate places. [2024-06-28 00:36:46,507 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 377 transitions, 7713 flow [2024-06-28 00:36:46,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:46,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:46,507 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, 1] [2024-06-28 00:36:46,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:36:46,508 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:46,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash 232100427, now seen corresponding path program 3 times [2024-06-28 00:36:46,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:46,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779688880] [2024-06-28 00:36:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:46,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:46,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779688880] [2024-06-28 00:36:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779688880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:46,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:46,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319022090] [2024-06-28 00:36:46,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:46,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:46,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:46,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 377 transitions, 7713 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:46,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:46,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:46,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:48,985 INFO L124 PetriNetUnfolderBase]: 6584/11413 cut-off events. [2024-06-28 00:36:48,985 INFO L125 PetriNetUnfolderBase]: For 619766/619768 co-relation queries the response was YES. [2024-06-28 00:36:49,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81217 conditions, 11413 events. 6584/11413 cut-off events. For 619766/619768 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 93886 event pairs, 2541 based on Foata normal form. 6/11177 useless extension candidates. Maximal degree in co-relation 81074. Up to 9380 conditions per place. [2024-06-28 00:36:49,160 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 353 selfloop transitions, 42 changer transitions 0/407 dead transitions. [2024-06-28 00:36:49,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 407 transitions, 8685 flow [2024-06-28 00:36:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:36:49,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-28 00:36:49,161 INFO L175 Difference]: Start difference. First operand has 306 places, 377 transitions, 7713 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:36:49,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 407 transitions, 8685 flow [2024-06-28 00:36:51,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 407 transitions, 8277 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-28 00:36:51,190 INFO L231 Difference]: Finished difference. Result has 309 places, 377 transitions, 7397 flow [2024-06-28 00:36:51,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7305, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7397, PETRI_PLACES=309, PETRI_TRANSITIONS=377} [2024-06-28 00:36:51,191 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 254 predicate places. [2024-06-28 00:36:51,191 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 377 transitions, 7397 flow [2024-06-28 00:36:51,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:51,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:51,191 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, 1] [2024-06-28 00:36:51,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:36:51,191 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:51,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash 431282061, now seen corresponding path program 6 times [2024-06-28 00:36:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:51,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666216204] [2024-06-28 00:36:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:51,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:51,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666216204] [2024-06-28 00:36:51,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666216204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:51,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:51,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:51,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204855300] [2024-06-28 00:36:51,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:51,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:51,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:51,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:51,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:51,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:51,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 377 transitions, 7397 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:51,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:51,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:51,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:53,995 INFO L124 PetriNetUnfolderBase]: 7219/12464 cut-off events. [2024-06-28 00:36:53,995 INFO L125 PetriNetUnfolderBase]: For 686790/686798 co-relation queries the response was YES. [2024-06-28 00:36:54,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88432 conditions, 12464 events. 7219/12464 cut-off events. For 686790/686798 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 103108 event pairs, 1969 based on Foata normal form. 18/12274 useless extension candidates. Maximal degree in co-relation 88288. Up to 9071 conditions per place. [2024-06-28 00:36:54,166 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 355 selfloop transitions, 130 changer transitions 0/497 dead transitions. [2024-06-28 00:36:54,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 497 transitions, 10072 flow [2024-06-28 00:36:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 00:36:54,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-06-28 00:36:54,167 INFO L175 Difference]: Start difference. First operand has 309 places, 377 transitions, 7397 flow. Second operand 7 states and 223 transitions. [2024-06-28 00:36:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 497 transitions, 10072 flow [2024-06-28 00:36:56,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 497 transitions, 9993 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:56,018 INFO L231 Difference]: Finished difference. Result has 316 places, 431 transitions, 9084 flow [2024-06-28 00:36:56,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9084, PETRI_PLACES=316, PETRI_TRANSITIONS=431} [2024-06-28 00:36:56,018 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 261 predicate places. [2024-06-28 00:36:56,018 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 431 transitions, 9084 flow [2024-06-28 00:36:56,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:56,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:56,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:56,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:36:56,019 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:36:56,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash -877350481, now seen corresponding path program 7 times [2024-06-28 00:36:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:56,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223396387] [2024-06-28 00:36:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:56,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223396387] [2024-06-28 00:36:56,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223396387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:56,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:56,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:56,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563185958] [2024-06-28 00:36:56,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:56,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:56,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:56,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:36:56,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 431 transitions, 9084 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:56,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:56,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:36:56,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:59,005 INFO L124 PetriNetUnfolderBase]: 7734/13295 cut-off events. [2024-06-28 00:36:59,005 INFO L125 PetriNetUnfolderBase]: For 799702/799708 co-relation queries the response was YES. [2024-06-28 00:36:59,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98067 conditions, 13295 events. 7734/13295 cut-off events. For 799702/799708 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 110361 event pairs, 1134 based on Foata normal form. 21/13078 useless extension candidates. Maximal degree in co-relation 97918. Up to 7355 conditions per place. [2024-06-28 00:36:59,226 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 292 selfloop transitions, 205 changer transitions 0/509 dead transitions. [2024-06-28 00:36:59,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 509 transitions, 11278 flow [2024-06-28 00:36:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 00:36:59,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631868131868132 [2024-06-28 00:36:59,227 INFO L175 Difference]: Start difference. First operand has 316 places, 431 transitions, 9084 flow. Second operand 7 states and 205 transitions. [2024-06-28 00:36:59,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 509 transitions, 11278 flow [2024-06-28 00:37:01,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 509 transitions, 11142 flow, removed 68 selfloop flow, removed 0 redundant places. [2024-06-28 00:37:01,943 INFO L231 Difference]: Finished difference. Result has 325 places, 467 transitions, 10423 flow [2024-06-28 00:37:01,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=8956, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10423, PETRI_PLACES=325, PETRI_TRANSITIONS=467} [2024-06-28 00:37:01,944 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 270 predicate places. [2024-06-28 00:37:01,944 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 467 transitions, 10423 flow [2024-06-28 00:37:01,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:01,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:01,944 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, 1] [2024-06-28 00:37:01,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:37:01,944 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:37:01,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1164475575, now seen corresponding path program 8 times [2024-06-28 00:37:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:01,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501116884] [2024-06-28 00:37:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:01,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:02,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:02,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501116884] [2024-06-28 00:37:02,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501116884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:02,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:02,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:02,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142861181] [2024-06-28 00:37:02,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:02,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:37:02,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 467 transitions, 10423 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:02,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:02,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:37:02,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:05,206 INFO L124 PetriNetUnfolderBase]: 7890/13509 cut-off events. [2024-06-28 00:37:05,206 INFO L125 PetriNetUnfolderBase]: For 883044/883050 co-relation queries the response was YES. [2024-06-28 00:37:05,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104362 conditions, 13509 events. 7890/13509 cut-off events. For 883044/883050 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 112194 event pairs, 1657 based on Foata normal form. 17/13294 useless extension candidates. Maximal degree in co-relation 104208. Up to 4925 conditions per place. [2024-06-28 00:37:05,437 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 263 selfloop transitions, 252 changer transitions 0/527 dead transitions. [2024-06-28 00:37:05,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 527 transitions, 12601 flow [2024-06-28 00:37:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-28 00:37:05,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552884615384616 [2024-06-28 00:37:05,438 INFO L175 Difference]: Start difference. First operand has 325 places, 467 transitions, 10423 flow. Second operand 8 states and 231 transitions. [2024-06-28 00:37:05,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 527 transitions, 12601 flow [2024-06-28 00:37:08,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 527 transitions, 12299 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-28 00:37:08,823 INFO L231 Difference]: Finished difference. Result has 333 places, 478 transitions, 11217 flow [2024-06-28 00:37:08,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10121, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11217, PETRI_PLACES=333, PETRI_TRANSITIONS=478} [2024-06-28 00:37:08,824 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 278 predicate places. [2024-06-28 00:37:08,824 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 478 transitions, 11217 flow [2024-06-28 00:37:08,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:08,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:08,824 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, 1] [2024-06-28 00:37:08,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:37:08,824 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:37:08,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2007996169, now seen corresponding path program 4 times [2024-06-28 00:37:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:08,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017841135] [2024-06-28 00:37:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:09,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017841135] [2024-06-28 00:37:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017841135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:09,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:09,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446362313] [2024-06-28 00:37:09,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:37:09,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 478 transitions, 11217 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:09,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:09,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:37:09,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:12,199 INFO L124 PetriNetUnfolderBase]: 7866/13610 cut-off events. [2024-06-28 00:37:12,200 INFO L125 PetriNetUnfolderBase]: For 872836/872838 co-relation queries the response was YES. [2024-06-28 00:37:12,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106064 conditions, 13610 events. 7866/13610 cut-off events. For 872836/872838 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 114531 event pairs, 2722 based on Foata normal form. 10/13315 useless extension candidates. Maximal degree in co-relation 105905. Up to 11187 conditions per place. [2024-06-28 00:37:12,423 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 444 selfloop transitions, 52 changer transitions 0/508 dead transitions. [2024-06-28 00:37:12,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 508 transitions, 12287 flow [2024-06-28 00:37:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-28 00:37:12,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-28 00:37:12,424 INFO L175 Difference]: Start difference. First operand has 333 places, 478 transitions, 11217 flow. Second operand 7 states and 193 transitions. [2024-06-28 00:37:12,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 508 transitions, 12287 flow [2024-06-28 00:37:16,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 508 transitions, 11907 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:16,525 INFO L231 Difference]: Finished difference. Result has 338 places, 478 transitions, 10963 flow [2024-06-28 00:37:16,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10963, PETRI_PLACES=338, PETRI_TRANSITIONS=478} [2024-06-28 00:37:16,525 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 283 predicate places. [2024-06-28 00:37:16,526 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 478 transitions, 10963 flow [2024-06-28 00:37:16,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:16,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:16,526 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, 1] [2024-06-28 00:37:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:37:16,526 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:37:16,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 557048751, now seen corresponding path program 9 times [2024-06-28 00:37:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116072197] [2024-06-28 00:37:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:16,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116072197] [2024-06-28 00:37:16,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116072197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:16,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:16,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472214552] [2024-06-28 00:37:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:16,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:16,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:16,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:16,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:37:16,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 478 transitions, 10963 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:16,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:16,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:37:16,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:20,806 INFO L124 PetriNetUnfolderBase]: 8010/13807 cut-off events. [2024-06-28 00:37:20,806 INFO L125 PetriNetUnfolderBase]: For 942882/942888 co-relation queries the response was YES. [2024-06-28 00:37:20,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107076 conditions, 13807 events. 8010/13807 cut-off events. For 942882/942888 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 116124 event pairs, 1484 based on Foata normal form. 29/13600 useless extension candidates. Maximal degree in co-relation 106916. Up to 4941 conditions per place. [2024-06-28 00:37:20,997 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 252 selfloop transitions, 276 changer transitions 0/540 dead transitions. [2024-06-28 00:37:20,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 540 transitions, 13235 flow [2024-06-28 00:37:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-28 00:37:20,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-06-28 00:37:20,998 INFO L175 Difference]: Start difference. First operand has 338 places, 478 transitions, 10963 flow. Second operand 9 states and 250 transitions. [2024-06-28 00:37:20,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 540 transitions, 13235 flow [2024-06-28 00:37:24,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 540 transitions, 13137 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:24,196 INFO L231 Difference]: Finished difference. Result has 344 places, 489 transitions, 12087 flow [2024-06-28 00:37:24,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10865, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12087, PETRI_PLACES=344, PETRI_TRANSITIONS=489} [2024-06-28 00:37:24,197 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 289 predicate places. [2024-06-28 00:37:24,197 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 489 transitions, 12087 flow [2024-06-28 00:37:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:24,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:24,197 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, 1] [2024-06-28 00:37:24,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:37:24,198 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:37:24,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1629130307, now seen corresponding path program 5 times [2024-06-28 00:37:24,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:24,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352624939] [2024-06-28 00:37:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:24,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:24,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:24,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352624939] [2024-06-28 00:37:24,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352624939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:24,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:24,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:24,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745253197] [2024-06-28 00:37:24,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:24,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:24,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:37:24,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 489 transitions, 12087 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:24,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:24,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:37:24,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:28,313 INFO L124 PetriNetUnfolderBase]: 7998/13872 cut-off events. [2024-06-28 00:37:28,313 INFO L125 PetriNetUnfolderBase]: For 939294/939296 co-relation queries the response was YES. [2024-06-28 00:37:28,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110515 conditions, 13872 events. 7998/13872 cut-off events. For 939294/939296 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 117407 event pairs, 2752 based on Foata normal form. 6/13566 useless extension candidates. Maximal degree in co-relation 110353. Up to 11259 conditions per place. [2024-06-28 00:37:28,541 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 435 selfloop transitions, 78 changer transitions 0/525 dead transitions. [2024-06-28 00:37:28,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 525 transitions, 13207 flow [2024-06-28 00:37:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-28 00:37:28,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216346153846154 [2024-06-28 00:37:28,542 INFO L175 Difference]: Start difference. First operand has 344 places, 489 transitions, 12087 flow. Second operand 8 states and 217 transitions. [2024-06-28 00:37:28,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 525 transitions, 13207 flow [2024-06-28 00:37:32,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 525 transitions, 12692 flow, removed 141 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:32,526 INFO L231 Difference]: Finished difference. Result has 347 places, 489 transitions, 11746 flow [2024-06-28 00:37:32,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=11572, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11746, PETRI_PLACES=347, PETRI_TRANSITIONS=489} [2024-06-28 00:37:32,527 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 292 predicate places. [2024-06-28 00:37:32,527 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 489 transitions, 11746 flow [2024-06-28 00:37:32,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:32,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:32,527 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, 1] [2024-06-28 00:37:32,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:37:32,528 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:37:32,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2067493589, now seen corresponding path program 10 times [2024-06-28 00:37:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:32,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208971790] [2024-06-28 00:37:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:32,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:32,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208971790] [2024-06-28 00:37:32,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208971790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:32,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:32,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:32,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350272128] [2024-06-28 00:37:32,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:32,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:32,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:32,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:37:32,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 489 transitions, 11746 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:32,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:32,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:37:32,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:36,497 INFO L124 PetriNetUnfolderBase]: 8033/13887 cut-off events. [2024-06-28 00:37:36,497 INFO L125 PetriNetUnfolderBase]: For 963649/963762 co-relation queries the response was YES. [2024-06-28 00:37:36,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109054 conditions, 13887 events. 8033/13887 cut-off events. For 963649/963762 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 117589 event pairs, 2787 based on Foata normal form. 92/13726 useless extension candidates. Maximal degree in co-relation 108891. Up to 7307 conditions per place. [2024-06-28 00:37:36,706 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 353 selfloop transitions, 188 changer transitions 0/553 dead transitions. [2024-06-28 00:37:36,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 553 transitions, 14128 flow [2024-06-28 00:37:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-28 00:37:36,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-28 00:37:36,707 INFO L175 Difference]: Start difference. First operand has 347 places, 489 transitions, 11746 flow. Second operand 7 states and 193 transitions. [2024-06-28 00:37:36,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 553 transitions, 14128 flow [2024-06-28 00:37:40,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 553 transitions, 13916 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 00:37:40,248 INFO L231 Difference]: Finished difference. Result has 348 places, 504 transitions, 12468 flow [2024-06-28 00:37:40,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=11550, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12468, PETRI_PLACES=348, PETRI_TRANSITIONS=504} [2024-06-28 00:37:40,248 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 293 predicate places. [2024-06-28 00:37:40,248 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 504 transitions, 12468 flow [2024-06-28 00:37:40,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:40,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:40,249 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, 1, 1] [2024-06-28 00:37:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:37:40,249 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:37:40,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash 864546103, now seen corresponding path program 1 times [2024-06-28 00:37:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:40,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428700808] [2024-06-28 00:37:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:40,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428700808] [2024-06-28 00:37:40,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428700808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:40,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:40,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:40,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938311928] [2024-06-28 00:37:40,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:40,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:40,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:37:40,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 504 transitions, 12468 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:40,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:40,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:37:40,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:44,506 INFO L124 PetriNetUnfolderBase]: 8401/14596 cut-off events. [2024-06-28 00:37:44,506 INFO L125 PetriNetUnfolderBase]: For 1066213/1066219 co-relation queries the response was YES. [2024-06-28 00:37:44,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114510 conditions, 14596 events. 8401/14596 cut-off events. For 1066213/1066219 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 124622 event pairs, 1290 based on Foata normal form. 77/14394 useless extension candidates. Maximal degree in co-relation 114346. Up to 8514 conditions per place. [2024-06-28 00:37:44,733 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 347 selfloop transitions, 192 changer transitions 3/554 dead transitions. [2024-06-28 00:37:44,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 554 transitions, 14095 flow [2024-06-28 00:37:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:37:44,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659340659340659 [2024-06-28 00:37:44,734 INFO L175 Difference]: Start difference. First operand has 348 places, 504 transitions, 12468 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:37:44,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 554 transitions, 14095 flow [2024-06-28 00:37:49,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 554 transitions, 13609 flow, removed 106 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:49,553 INFO L231 Difference]: Finished difference. Result has 354 places, 512 transitions, 12711 flow [2024-06-28 00:37:49,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=11998, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12711, PETRI_PLACES=354, PETRI_TRANSITIONS=512} [2024-06-28 00:37:49,553 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 299 predicate places. [2024-06-28 00:37:49,553 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 512 transitions, 12711 flow [2024-06-28 00:37:49,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:49,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:49,554 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, 1, 1] [2024-06-28 00:37:49,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:37:49,554 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:37:49,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:49,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2083395231, now seen corresponding path program 2 times [2024-06-28 00:37:49,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:49,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785176818] [2024-06-28 00:37:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:49,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:49,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785176818] [2024-06-28 00:37:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785176818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:49,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:49,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:49,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035693608] [2024-06-28 00:37:49,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:49,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:49,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 00:37:49,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 512 transitions, 12711 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:49,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:49,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 00:37:49,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand