./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe032_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe032_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe032_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:33:15,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:33:15,160 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:33:15,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:33:15,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:33:15,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:33:15,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:33:15,179 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:33:15,179 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:33:15,180 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:33:15,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:33:15,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:33:15,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:33:15,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:33:15,181 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:33:15,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:33:15,182 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:33:15,182 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:33:15,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:33:15,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:33:15,183 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:33:15,186 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:33:15,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:33:15,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:33:15,187 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:33:15,187 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:33:15,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:33:15,188 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:33:15,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:33:15,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:33:15,188 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:33:15,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:33:15,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:33:15,189 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:33:15,189 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:33:15,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:33:15,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:33:15,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:33:15,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:33:15,192 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:33:15,192 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:33:15,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:33:15,194 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:33:15,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:33:15,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:33:15,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:33:15,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:33:15,416 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:33:15,417 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:33:15,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe032_tso.yml/witness.yml [2024-06-14 11:33:15,541 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:33:15,541 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:33:15,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-14 11:33:16,524 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:33:16,758 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:33:16,759 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-14 11:33:16,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb222be07/1df05a860f2d40229ae1ef8adbdc814f/FLAG4831e6227 [2024-06-14 11:33:16,785 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb222be07/1df05a860f2d40229ae1ef8adbdc814f [2024-06-14 11:33:16,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:33:16,787 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:33:16,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:33:16,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:33:16,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:33:16,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:33:15" (1/2) ... [2024-06-14 11:33:16,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11afb10 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:33:16, skipping insertion in model container [2024-06-14 11:33:16,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:33:15" (1/2) ... [2024-06-14 11:33:16,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@928e181 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:33:16, skipping insertion in model container [2024-06-14 11:33:16,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:33:16" (2/2) ... [2024-06-14 11:33:16,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11afb10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:16, skipping insertion in model container [2024-06-14 11:33:16,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:33:16" (2/2) ... [2024-06-14 11:33:16,803 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:33:16,850 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:33:16,851 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 11:33:16,851 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 11:33:16,851 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 11:33:16,851 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:33:16,852 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 11:33:16,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:33:17,164 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:33:17,170 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:33:17,273 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:33:17,301 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:33:17,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17 WrapperNode [2024-06-14 11:33:17,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:33:17,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:33:17,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:33:17,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:33:17,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,316 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,332 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 11:33:17,333 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:33:17,333 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:33:17,333 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:33:17,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:33:17,341 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,343 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,352 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:33:17,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,357 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:33:17,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:33:17,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:33:17,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:33:17,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (1/1) ... [2024-06-14 11:33:17,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:33:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:33:17,383 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) [2024-06-14 11:33:17,389 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 [2024-06-14 11:33:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:33:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:33:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:33:17,409 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:33:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:33:17,409 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:33:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:33:17,410 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:33:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:33:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:33:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:33:17,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:33:17,411 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:33:17,516 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:33:17,518 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:33:17,696 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:33:17,696 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:33:17,783 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:33:17,783 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:33:17,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:33:17 BoogieIcfgContainer [2024-06-14 11:33:17,784 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:33:17,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:33:17,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:33:17,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:33:17,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:33:15" (1/4) ... [2024-06-14 11:33:17,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7894f979 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:33:17, skipping insertion in model container [2024-06-14 11:33:17,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:33:16" (2/4) ... [2024-06-14 11:33:17,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7894f979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:33:17, skipping insertion in model container [2024-06-14 11:33:17,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:33:17" (3/4) ... [2024-06-14 11:33:17,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7894f979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:33:17, skipping insertion in model container [2024-06-14 11:33:17,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:33:17" (4/4) ... [2024-06-14 11:33:17,793 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-14 11:33:17,805 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:33:17,805 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:33:17,805 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:33:17,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:33:17,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:33:17,920 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 11:33:17,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:33:17,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:33:17,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:33:17,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 11:33:17,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:33:17,940 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;@1b103e90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:33:17,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:33:17,947 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:33:17,947 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:33:17,947 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:33:17,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:17,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:33:17,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:17,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1786993437, now seen corresponding path program 1 times [2024-06-14 11:33:17,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:17,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615226967] [2024-06-14 11:33:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:17,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615226967] [2024-06-14 11:33:18,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615226967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:18,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:18,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:33:18,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144415074] [2024-06-14 11:33:18,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:33:18,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:33:18,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:33:18,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-14 11:33:18,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:18,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:18,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-14 11:33:18,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:18,638 INFO L124 PetriNetUnfolderBase]: 575/991 cut-off events. [2024-06-14 11:33:18,652 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 11:33:18,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1933 conditions, 991 events. 575/991 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5166 event pairs, 361 based on Foata normal form. 1/923 useless extension candidates. Maximal degree in co-relation 1918. Up to 885 conditions per place. [2024-06-14 11:33:18,683 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 11:33:18,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 171 flow [2024-06-14 11:33:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:33:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:33:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-14 11:33:18,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821705426356589 [2024-06-14 11:33:18,706 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 88 transitions. [2024-06-14 11:33:18,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 171 flow [2024-06-14 11:33:18,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:18,710 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 11:33:18,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 11:33:18,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 11:33:18,714 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 11:33:18,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:18,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:18,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:18,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:33:18,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:18,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:18,715 INFO L85 PathProgramCache]: Analyzing trace with hash 686260866, now seen corresponding path program 1 times [2024-06-14 11:33:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:18,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797187492] [2024-06-14 11:33:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:18,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:18,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797187492] [2024-06-14 11:33:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797187492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:18,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:18,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:33:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369700137] [2024-06-14 11:33:18,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:18,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:33:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:33:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:33:18,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-14 11:33:18,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:18,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:18,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-14 11:33:18,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:18,990 INFO L124 PetriNetUnfolderBase]: 569/967 cut-off events. [2024-06-14 11:33:18,990 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-14 11:33:18,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 967 events. 569/967 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4942 event pairs, 293 based on Foata normal form. 3/938 useless extension candidates. Maximal degree in co-relation 2189. Up to 861 conditions per place. [2024-06-14 11:33:18,997 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 37 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 11:33:18,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 238 flow [2024-06-14 11:33:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:33:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:33:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-14 11:33:19,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6686046511627907 [2024-06-14 11:33:19,001 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 115 transitions. [2024-06-14 11:33:19,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 238 flow [2024-06-14 11:33:19,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:33:19,004 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 11:33:19,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 11:33:19,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 11:33:19,006 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 11:33:19,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:19,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:19,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:33:19,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:19,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash -458046107, now seen corresponding path program 1 times [2024-06-14 11:33:19,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:19,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524624322] [2024-06-14 11:33:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:19,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:19,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:19,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524624322] [2024-06-14 11:33:19,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524624322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:19,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:19,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:33:19,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108595855] [2024-06-14 11:33:19,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:19,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:33:19,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:33:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:33:19,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:19,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:19,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:19,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:19,301 INFO L124 PetriNetUnfolderBase]: 936/1530 cut-off events. [2024-06-14 11:33:19,301 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2024-06-14 11:33:19,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3856 conditions, 1530 events. 936/1530 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7764 event pairs, 533 based on Foata normal form. 3/1531 useless extension candidates. Maximal degree in co-relation 3839. Up to 1395 conditions per place. [2024-06-14 11:33:19,308 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-14 11:33:19,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 306 flow [2024-06-14 11:33:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:33:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:33:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-14 11:33:19,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2024-06-14 11:33:19,309 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 4 states and 109 transitions. [2024-06-14 11:33:19,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 306 flow [2024-06-14 11:33:19,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 292 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:19,311 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 204 flow [2024-06-14 11:33:19,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-06-14 11:33:19,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-14 11:33:19,312 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 204 flow [2024-06-14 11:33:19,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:19,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:19,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:33:19,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:19,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1901882944, now seen corresponding path program 1 times [2024-06-14 11:33:19,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:19,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693032253] [2024-06-14 11:33:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:19,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:19,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:19,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693032253] [2024-06-14 11:33:19,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693032253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:19,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:19,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:19,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497634740] [2024-06-14 11:33:19,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:19,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:19,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-14 11:33:19,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:19,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-14 11:33:19,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:19,643 INFO L124 PetriNetUnfolderBase]: 857/1494 cut-off events. [2024-06-14 11:33:19,643 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2024-06-14 11:33:19,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4120 conditions, 1494 events. 857/1494 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7958 event pairs, 254 based on Foata normal form. 6/1464 useless extension candidates. Maximal degree in co-relation 4101. Up to 1227 conditions per place. [2024-06-14 11:33:19,651 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 11:33:19,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 424 flow [2024-06-14 11:33:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 11:33:19,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-14 11:33:19,669 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 204 flow. Second operand 6 states and 160 transitions. [2024-06-14 11:33:19,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 424 flow [2024-06-14 11:33:19,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 418 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:19,681 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 259 flow [2024-06-14 11:33:19,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-14 11:33:19,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-14 11:33:19,682 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 259 flow [2024-06-14 11:33:19,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:19,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:19,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:33:19,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:19,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:19,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1534252366, now seen corresponding path program 1 times [2024-06-14 11:33:19,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:19,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051249956] [2024-06-14 11:33:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:19,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:19,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:19,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051249956] [2024-06-14 11:33:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051249956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:19,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:19,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876662730] [2024-06-14 11:33:19,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:19,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:19,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:19,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:19,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:20,050 INFO L124 PetriNetUnfolderBase]: 968/1627 cut-off events. [2024-06-14 11:33:20,050 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2024-06-14 11:33:20,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5014 conditions, 1627 events. 968/1627 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8523 event pairs, 346 based on Foata normal form. 4/1623 useless extension candidates. Maximal degree in co-relation 4991. Up to 1333 conditions per place. [2024-06-14 11:33:20,060 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 22 changer transitions 0/89 dead transitions. [2024-06-14 11:33:20,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 581 flow [2024-06-14 11:33:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-14 11:33:20,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558139534883721 [2024-06-14 11:33:20,062 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 259 flow. Second operand 5 states and 141 transitions. [2024-06-14 11:33:20,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 581 flow [2024-06-14 11:33:20,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 550 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:20,071 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 385 flow [2024-06-14 11:33:20,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2024-06-14 11:33:20,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 11:33:20,074 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 385 flow [2024-06-14 11:33:20,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:20,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:20,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:33:20,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:20,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1408350042, now seen corresponding path program 2 times [2024-06-14 11:33:20,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:20,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494745752] [2024-06-14 11:33:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:20,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:20,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:20,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494745752] [2024-06-14 11:33:20,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494745752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:20,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:20,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:20,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882542490] [2024-06-14 11:33:20,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:20,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:20,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:20,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:20,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:20,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:20,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 385 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:20,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:20,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:20,423 INFO L124 PetriNetUnfolderBase]: 993/1673 cut-off events. [2024-06-14 11:33:20,423 INFO L125 PetriNetUnfolderBase]: For 4545/4545 co-relation queries the response was YES. [2024-06-14 11:33:20,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5994 conditions, 1673 events. 993/1673 cut-off events. For 4545/4545 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8868 event pairs, 374 based on Foata normal form. 4/1671 useless extension candidates. Maximal degree in co-relation 5968. Up to 1359 conditions per place. [2024-06-14 11:33:20,434 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 30 changer transitions 0/93 dead transitions. [2024-06-14 11:33:20,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 93 transitions, 697 flow [2024-06-14 11:33:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:33:20,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2024-06-14 11:33:20,436 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 385 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:33:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 93 transitions, 697 flow [2024-06-14 11:33:20,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 667 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:20,443 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 548 flow [2024-06-14 11:33:20,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=548, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2024-06-14 11:33:20,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 11:33:20,445 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 548 flow [2024-06-14 11:33:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:20,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:20,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:33:20,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:20,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1430684364, now seen corresponding path program 1 times [2024-06-14 11:33:20,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:20,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099642535] [2024-06-14 11:33:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099642535] [2024-06-14 11:33:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099642535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:20,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:20,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772035439] [2024-06-14 11:33:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:20,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:20,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:20,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:20,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 548 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:20,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:20,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:20,748 INFO L124 PetriNetUnfolderBase]: 995/1683 cut-off events. [2024-06-14 11:33:20,748 INFO L125 PetriNetUnfolderBase]: For 5890/5890 co-relation queries the response was YES. [2024-06-14 11:33:20,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6468 conditions, 1683 events. 995/1683 cut-off events. For 5890/5890 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8902 event pairs, 343 based on Foata normal form. 3/1684 useless extension candidates. Maximal degree in co-relation 6437. Up to 1456 conditions per place. [2024-06-14 11:33:20,761 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-14 11:33:20,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 828 flow [2024-06-14 11:33:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 11:33:20,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-06-14 11:33:20,763 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 548 flow. Second operand 5 states and 132 transitions. [2024-06-14 11:33:20,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 828 flow [2024-06-14 11:33:20,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 795 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 11:33:20,770 INFO L231 Difference]: Finished difference. Result has 71 places, 83 transitions, 612 flow [2024-06-14 11:33:20,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=612, PETRI_PLACES=71, PETRI_TRANSITIONS=83} [2024-06-14 11:33:20,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 11:33:20,772 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 83 transitions, 612 flow [2024-06-14 11:33:20,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:20,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:33:20,772 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:20,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -981907983, now seen corresponding path program 1 times [2024-06-14 11:33:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:20,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152347802] [2024-06-14 11:33:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:20,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:20,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:20,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152347802] [2024-06-14 11:33:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152347802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:20,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:33:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953306211] [2024-06-14 11:33:20,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:20,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:33:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:33:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:33:20,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:20,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 83 transitions, 612 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) [2024-06-14 11:33:20,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:20,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:21,039 INFO L124 PetriNetUnfolderBase]: 983/1654 cut-off events. [2024-06-14 11:33:21,040 INFO L125 PetriNetUnfolderBase]: For 7065/7065 co-relation queries the response was YES. [2024-06-14 11:33:21,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6635 conditions, 1654 events. 983/1654 cut-off events. For 7065/7065 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8649 event pairs, 355 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 6602. Up to 1462 conditions per place. [2024-06-14 11:33:21,055 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 72 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-14 11:33:21,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 798 flow [2024-06-14 11:33:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:33:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:33:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 11:33:21,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-14 11:33:21,059 INFO L175 Difference]: Start difference. First operand has 71 places, 83 transitions, 612 flow. Second operand 4 states and 103 transitions. [2024-06-14 11:33:21,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 798 flow [2024-06-14 11:33:21,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 768 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 11:33:21,068 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 612 flow [2024-06-14 11:33:21,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=612, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-14 11:33:21,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 11:33:21,070 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 612 flow [2024-06-14 11:33:21,071 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) [2024-06-14 11:33:21,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:21,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:21,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:33:21,071 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:21,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:21,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1237997805, now seen corresponding path program 1 times [2024-06-14 11:33:21,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:21,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47398319] [2024-06-14 11:33:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:21,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:21,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47398319] [2024-06-14 11:33:21,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47398319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:21,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:21,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:21,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441197486] [2024-06-14 11:33:21,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:21,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:21,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:21,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 612 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:21,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:21,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:21,429 INFO L124 PetriNetUnfolderBase]: 1017/1709 cut-off events. [2024-06-14 11:33:21,430 INFO L125 PetriNetUnfolderBase]: For 8020/8020 co-relation queries the response was YES. [2024-06-14 11:33:21,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6976 conditions, 1709 events. 1017/1709 cut-off events. For 8020/8020 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8951 event pairs, 334 based on Foata normal form. 3/1710 useless extension candidates. Maximal degree in co-relation 6940. Up to 1477 conditions per place. [2024-06-14 11:33:21,447 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 92 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-06-14 11:33:21,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 980 flow [2024-06-14 11:33:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:33:21,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 11:33:21,448 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 612 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:33:21,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 980 flow [2024-06-14 11:33:21,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 952 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:21,457 INFO L231 Difference]: Finished difference. Result has 79 places, 91 transitions, 710 flow [2024-06-14 11:33:21,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=79, PETRI_TRANSITIONS=91} [2024-06-14 11:33:21,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-14 11:33:21,458 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 91 transitions, 710 flow [2024-06-14 11:33:21,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:21,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:21,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:21,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:33:21,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:21,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1238117775, now seen corresponding path program 2 times [2024-06-14 11:33:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:21,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168966337] [2024-06-14 11:33:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:21,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:21,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168966337] [2024-06-14 11:33:21,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168966337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:21,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:21,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:21,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413054416] [2024-06-14 11:33:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:21,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:21,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:21,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:21,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 91 transitions, 710 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:21,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:21,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:21,790 INFO L124 PetriNetUnfolderBase]: 1074/1811 cut-off events. [2024-06-14 11:33:21,790 INFO L125 PetriNetUnfolderBase]: For 10643/10643 co-relation queries the response was YES. [2024-06-14 11:33:21,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7906 conditions, 1811 events. 1074/1811 cut-off events. For 10643/10643 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9711 event pairs, 332 based on Foata normal form. 4/1807 useless extension candidates. Maximal degree in co-relation 7869. Up to 1342 conditions per place. [2024-06-14 11:33:21,802 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 52 changer transitions 0/136 dead transitions. [2024-06-14 11:33:21,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 136 transitions, 1266 flow [2024-06-14 11:33:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-14 11:33:21,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550387596899225 [2024-06-14 11:33:21,803 INFO L175 Difference]: Start difference. First operand has 79 places, 91 transitions, 710 flow. Second operand 6 states and 169 transitions. [2024-06-14 11:33:21,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 136 transitions, 1266 flow [2024-06-14 11:33:21,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 136 transitions, 1214 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:21,813 INFO L231 Difference]: Finished difference. Result has 83 places, 108 transitions, 945 flow [2024-06-14 11:33:21,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=945, PETRI_PLACES=83, PETRI_TRANSITIONS=108} [2024-06-14 11:33:21,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 11:33:21,815 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 108 transitions, 945 flow [2024-06-14 11:33:21,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:21,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:21,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:21,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:33:21,816 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:21,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 981370231, now seen corresponding path program 1 times [2024-06-14 11:33:21,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:21,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182918652] [2024-06-14 11:33:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:21,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:21,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:21,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182918652] [2024-06-14 11:33:21,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182918652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:21,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:21,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:21,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569735114] [2024-06-14 11:33:21,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:21,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:21,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:21,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:21,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 108 transitions, 945 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:21,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:21,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:21,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:22,174 INFO L124 PetriNetUnfolderBase]: 1107/1871 cut-off events. [2024-06-14 11:33:22,175 INFO L125 PetriNetUnfolderBase]: For 13757/13757 co-relation queries the response was YES. [2024-06-14 11:33:22,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8943 conditions, 1871 events. 1107/1871 cut-off events. For 13757/13757 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10159 event pairs, 323 based on Foata normal form. 4/1866 useless extension candidates. Maximal degree in co-relation 8903. Up to 1424 conditions per place. [2024-06-14 11:33:22,188 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 98 selfloop transitions, 41 changer transitions 0/147 dead transitions. [2024-06-14 11:33:22,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 147 transitions, 1459 flow [2024-06-14 11:33:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-14 11:33:22,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-06-14 11:33:22,190 INFO L175 Difference]: Start difference. First operand has 83 places, 108 transitions, 945 flow. Second operand 6 states and 167 transitions. [2024-06-14 11:33:22,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 147 transitions, 1459 flow [2024-06-14 11:33:22,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 1399 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:22,207 INFO L231 Difference]: Finished difference. Result has 90 places, 121 transitions, 1108 flow [2024-06-14 11:33:22,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1108, PETRI_PLACES=90, PETRI_TRANSITIONS=121} [2024-06-14 11:33:22,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 11:33:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 121 transitions, 1108 flow [2024-06-14 11:33:22,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:22,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:22,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:22,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:33:22,209 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:22,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash -509673915, now seen corresponding path program 3 times [2024-06-14 11:33:22,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:22,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760176365] [2024-06-14 11:33:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:22,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:22,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:22,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760176365] [2024-06-14 11:33:22,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760176365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:22,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:22,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:22,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049470667] [2024-06-14 11:33:22,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:22,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:22,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:22,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:22,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 121 transitions, 1108 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:22,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:22,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:22,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:22,545 INFO L124 PetriNetUnfolderBase]: 1122/1897 cut-off events. [2024-06-14 11:33:22,546 INFO L125 PetriNetUnfolderBase]: For 15921/15921 co-relation queries the response was YES. [2024-06-14 11:33:22,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9535 conditions, 1897 events. 1122/1897 cut-off events. For 15921/15921 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10364 event pairs, 342 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 9491. Up to 1407 conditions per place. [2024-06-14 11:33:22,559 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 56 changer transitions 0/151 dead transitions. [2024-06-14 11:33:22,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 151 transitions, 1584 flow [2024-06-14 11:33:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 11:33:22,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317829457364341 [2024-06-14 11:33:22,561 INFO L175 Difference]: Start difference. First operand has 90 places, 121 transitions, 1108 flow. Second operand 6 states and 163 transitions. [2024-06-14 11:33:22,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 151 transitions, 1584 flow [2024-06-14 11:33:22,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 151 transitions, 1535 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 11:33:22,576 INFO L231 Difference]: Finished difference. Result has 96 places, 130 transitions, 1311 flow [2024-06-14 11:33:22,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=96, PETRI_TRANSITIONS=130} [2024-06-14 11:33:22,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 11:33:22,577 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 130 transitions, 1311 flow [2024-06-14 11:33:22,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:22,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:22,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:22,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:33:22,578 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:22,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:22,578 INFO L85 PathProgramCache]: Analyzing trace with hash 440783043, now seen corresponding path program 2 times [2024-06-14 11:33:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:22,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286238100] [2024-06-14 11:33:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:22,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:22,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:22,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286238100] [2024-06-14 11:33:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286238100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:22,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:22,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:22,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920713092] [2024-06-14 11:33:22,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:22,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:22,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:22,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:22,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 130 transitions, 1311 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:22,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:22,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:22,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:22,945 INFO L124 PetriNetUnfolderBase]: 1177/2000 cut-off events. [2024-06-14 11:33:22,946 INFO L125 PetriNetUnfolderBase]: For 19089/19089 co-relation queries the response was YES. [2024-06-14 11:33:22,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10490 conditions, 2000 events. 1177/2000 cut-off events. For 19089/19089 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11087 event pairs, 330 based on Foata normal form. 4/2000 useless extension candidates. Maximal degree in co-relation 10442. Up to 1498 conditions per place. [2024-06-14 11:33:22,961 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 52 changer transitions 0/167 dead transitions. [2024-06-14 11:33:22,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 167 transitions, 1917 flow [2024-06-14 11:33:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 11:33:22,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434108527131783 [2024-06-14 11:33:22,963 INFO L175 Difference]: Start difference. First operand has 96 places, 130 transitions, 1311 flow. Second operand 6 states and 166 transitions. [2024-06-14 11:33:22,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 167 transitions, 1917 flow [2024-06-14 11:33:22,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 167 transitions, 1838 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:22,986 INFO L231 Difference]: Finished difference. Result has 101 places, 144 transitions, 1517 flow [2024-06-14 11:33:22,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1517, PETRI_PLACES=101, PETRI_TRANSITIONS=144} [2024-06-14 11:33:22,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 11:33:22,986 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 144 transitions, 1517 flow [2024-06-14 11:33:22,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:22,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:22,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:22,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:33:22,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:22,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1497777401, now seen corresponding path program 3 times [2024-06-14 11:33:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:22,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162927455] [2024-06-14 11:33:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:22,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162927455] [2024-06-14 11:33:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162927455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:23,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:23,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698320447] [2024-06-14 11:33:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:23,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:23,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:23,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:23,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:23,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:23,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 144 transitions, 1517 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:23,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:23,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:23,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:23,340 INFO L124 PetriNetUnfolderBase]: 1168/1988 cut-off events. [2024-06-14 11:33:23,341 INFO L125 PetriNetUnfolderBase]: For 21306/21306 co-relation queries the response was YES. [2024-06-14 11:33:23,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10656 conditions, 1988 events. 1168/1988 cut-off events. For 21306/21306 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11021 event pairs, 330 based on Foata normal form. 4/1988 useless extension candidates. Maximal degree in co-relation 10605. Up to 1492 conditions per place. [2024-06-14 11:33:23,353 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 51 changer transitions 0/166 dead transitions. [2024-06-14 11:33:23,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 166 transitions, 1965 flow [2024-06-14 11:33:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-14 11:33:23,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6356589147286822 [2024-06-14 11:33:23,355 INFO L175 Difference]: Start difference. First operand has 101 places, 144 transitions, 1517 flow. Second operand 6 states and 164 transitions. [2024-06-14 11:33:23,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 166 transitions, 1965 flow [2024-06-14 11:33:23,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 166 transitions, 1913 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:23,381 INFO L231 Difference]: Finished difference. Result has 107 places, 144 transitions, 1578 flow [2024-06-14 11:33:23,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1578, PETRI_PLACES=107, PETRI_TRANSITIONS=144} [2024-06-14 11:33:23,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 11:33:23,382 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 144 transitions, 1578 flow [2024-06-14 11:33:23,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:23,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:23,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:23,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:33:23,383 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:23,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:23,383 INFO L85 PathProgramCache]: Analyzing trace with hash 449364835, now seen corresponding path program 1 times [2024-06-14 11:33:23,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:23,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973092987] [2024-06-14 11:33:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:23,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:23,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973092987] [2024-06-14 11:33:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973092987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:23,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:23,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:23,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548595713] [2024-06-14 11:33:23,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:23,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:23,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:23,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 144 transitions, 1578 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:23,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:23,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:23,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:23,757 INFO L124 PetriNetUnfolderBase]: 1168/1990 cut-off events. [2024-06-14 11:33:23,757 INFO L125 PetriNetUnfolderBase]: For 23874/23874 co-relation queries the response was YES. [2024-06-14 11:33:23,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11000 conditions, 1990 events. 1168/1990 cut-off events. For 23874/23874 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10921 event pairs, 313 based on Foata normal form. 6/1994 useless extension candidates. Maximal degree in co-relation 10946. Up to 1681 conditions per place. [2024-06-14 11:33:23,772 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 140 selfloop transitions, 20 changer transitions 0/168 dead transitions. [2024-06-14 11:33:23,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 168 transitions, 2026 flow [2024-06-14 11:33:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:33:23,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007751937984496 [2024-06-14 11:33:23,773 INFO L175 Difference]: Start difference. First operand has 107 places, 144 transitions, 1578 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:33:23,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 168 transitions, 2026 flow [2024-06-14 11:33:23,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 168 transitions, 1915 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:23,800 INFO L231 Difference]: Finished difference. Result has 109 places, 147 transitions, 1569 flow [2024-06-14 11:33:23,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1569, PETRI_PLACES=109, PETRI_TRANSITIONS=147} [2024-06-14 11:33:23,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 11:33:23,802 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 147 transitions, 1569 flow [2024-06-14 11:33:23,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:23,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:23,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:23,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:33:23,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:23,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash -374375099, now seen corresponding path program 1 times [2024-06-14 11:33:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:23,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554770993] [2024-06-14 11:33:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:23,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554770993] [2024-06-14 11:33:23,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554770993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:23,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:23,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:23,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484297354] [2024-06-14 11:33:23,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:23,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:23,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:23,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:23,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 147 transitions, 1569 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2024-06-14 11:33:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:23,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:24,111 INFO L124 PetriNetUnfolderBase]: 1160/1967 cut-off events. [2024-06-14 11:33:24,112 INFO L125 PetriNetUnfolderBase]: For 24861/24861 co-relation queries the response was YES. [2024-06-14 11:33:24,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10935 conditions, 1967 events. 1160/1967 cut-off events. For 24861/24861 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10843 event pairs, 332 based on Foata normal form. 4/1962 useless extension candidates. Maximal degree in co-relation 10880. Up to 1613 conditions per place. [2024-06-14 11:33:24,128 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 120 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2024-06-14 11:33:24,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 158 transitions, 1955 flow [2024-06-14 11:33:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:33:24,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 11:33:24,129 INFO L175 Difference]: Start difference. First operand has 109 places, 147 transitions, 1569 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:33:24,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 158 transitions, 1955 flow [2024-06-14 11:33:24,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1877 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:24,157 INFO L231 Difference]: Finished difference. Result has 110 places, 147 transitions, 1560 flow [2024-06-14 11:33:24,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1560, PETRI_PLACES=110, PETRI_TRANSITIONS=147} [2024-06-14 11:33:24,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-14 11:33:24,158 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 147 transitions, 1560 flow [2024-06-14 11:33:24,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2024-06-14 11:33:24,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:24,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:24,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:33:24,159 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:24,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash -343833584, now seen corresponding path program 1 times [2024-06-14 11:33:24,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:24,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076691554] [2024-06-14 11:33:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:24,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076691554] [2024-06-14 11:33:24,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076691554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:24,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:24,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:24,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537934823] [2024-06-14 11:33:24,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:24,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:24,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:24,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:24,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 147 transitions, 1560 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2024-06-14 11:33:24,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:24,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:24,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:24,475 INFO L124 PetriNetUnfolderBase]: 1170/1993 cut-off events. [2024-06-14 11:33:24,475 INFO L125 PetriNetUnfolderBase]: For 26119/26119 co-relation queries the response was YES. [2024-06-14 11:33:24,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11178 conditions, 1993 events. 1170/1993 cut-off events. For 26119/26119 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10981 event pairs, 322 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 11122. Up to 1619 conditions per place. [2024-06-14 11:33:24,493 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 126 selfloop transitions, 34 changer transitions 0/168 dead transitions. [2024-06-14 11:33:24,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 168 transitions, 2060 flow [2024-06-14 11:33:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-14 11:33:24,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-14 11:33:24,495 INFO L175 Difference]: Start difference. First operand has 110 places, 147 transitions, 1560 flow. Second operand 5 states and 135 transitions. [2024-06-14 11:33:24,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 168 transitions, 2060 flow [2024-06-14 11:33:24,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 168 transitions, 1946 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:24,525 INFO L231 Difference]: Finished difference. Result has 109 places, 151 transitions, 1599 flow [2024-06-14 11:33:24,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1599, PETRI_PLACES=109, PETRI_TRANSITIONS=151} [2024-06-14 11:33:24,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 11:33:24,526 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 151 transitions, 1599 flow [2024-06-14 11:33:24,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2024-06-14 11:33:24,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:24,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:24,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:33:24,527 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:24,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1279259280, now seen corresponding path program 2 times [2024-06-14 11:33:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:24,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114255268] [2024-06-14 11:33:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114255268] [2024-06-14 11:33:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114255268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:24,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:24,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969886336] [2024-06-14 11:33:24,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:24,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:24,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:24,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 151 transitions, 1599 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2024-06-14 11:33:24,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:24,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:24,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:24,817 INFO L124 PetriNetUnfolderBase]: 1142/1930 cut-off events. [2024-06-14 11:33:24,817 INFO L125 PetriNetUnfolderBase]: For 27298/27298 co-relation queries the response was YES. [2024-06-14 11:33:24,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10793 conditions, 1930 events. 1142/1930 cut-off events. For 27298/27298 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10551 event pairs, 336 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 10740. Up to 1589 conditions per place. [2024-06-14 11:33:24,832 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 120 selfloop transitions, 33 changer transitions 0/161 dead transitions. [2024-06-14 11:33:24,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1963 flow [2024-06-14 11:33:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 11:33:24,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:33:24,833 INFO L175 Difference]: Start difference. First operand has 109 places, 151 transitions, 1599 flow. Second operand 5 states and 129 transitions. [2024-06-14 11:33:24,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1963 flow [2024-06-14 11:33:24,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 161 transitions, 1904 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:24,861 INFO L231 Difference]: Finished difference. Result has 112 places, 151 transitions, 1615 flow [2024-06-14 11:33:24,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1615, PETRI_PLACES=112, PETRI_TRANSITIONS=151} [2024-06-14 11:33:24,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-14 11:33:24,862 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 151 transitions, 1615 flow [2024-06-14 11:33:24,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2024-06-14 11:33:24,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:24,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:24,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:33:24,863 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:24,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:24,863 INFO L85 PathProgramCache]: Analyzing trace with hash 349854028, now seen corresponding path program 1 times [2024-06-14 11:33:24,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:24,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107025722] [2024-06-14 11:33:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:24,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:24,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107025722] [2024-06-14 11:33:24,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107025722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:24,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:24,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:24,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634652973] [2024-06-14 11:33:24,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:24,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:25,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:25,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 151 transitions, 1615 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:25,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:25,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:25,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:25,301 INFO L124 PetriNetUnfolderBase]: 1221/2074 cut-off events. [2024-06-14 11:33:25,301 INFO L125 PetriNetUnfolderBase]: For 31383/31383 co-relation queries the response was YES. [2024-06-14 11:33:25,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11671 conditions, 2074 events. 1221/2074 cut-off events. For 31383/31383 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11488 event pairs, 188 based on Foata normal form. 6/2078 useless extension candidates. Maximal degree in co-relation 11617. Up to 1650 conditions per place. [2024-06-14 11:33:25,317 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 165 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2024-06-14 11:33:25,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 196 transitions, 2297 flow [2024-06-14 11:33:25,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:33:25,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-14 11:33:25,319 INFO L175 Difference]: Start difference. First operand has 112 places, 151 transitions, 1615 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:33:25,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 196 transitions, 2297 flow [2024-06-14 11:33:25,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 196 transitions, 2175 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:25,356 INFO L231 Difference]: Finished difference. Result has 115 places, 157 transitions, 1648 flow [2024-06-14 11:33:25,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1648, PETRI_PLACES=115, PETRI_TRANSITIONS=157} [2024-06-14 11:33:25,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 11:33:25,357 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 157 transitions, 1648 flow [2024-06-14 11:33:25,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:25,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:25,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:25,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:33:25,358 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:25,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash 670833636, now seen corresponding path program 2 times [2024-06-14 11:33:25,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:25,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382713638] [2024-06-14 11:33:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:25,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:25,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:25,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382713638] [2024-06-14 11:33:25,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382713638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:25,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278448039] [2024-06-14 11:33:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:25,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:25,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 157 transitions, 1648 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:25,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:25,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:25,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:25,812 INFO L124 PetriNetUnfolderBase]: 1224/2074 cut-off events. [2024-06-14 11:33:25,812 INFO L125 PetriNetUnfolderBase]: For 33029/33029 co-relation queries the response was YES. [2024-06-14 11:33:25,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11986 conditions, 2074 events. 1224/2074 cut-off events. For 33029/33029 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11419 event pairs, 288 based on Foata normal form. 6/2078 useless extension candidates. Maximal degree in co-relation 11930. Up to 1754 conditions per place. [2024-06-14 11:33:25,831 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 163 selfloop transitions, 21 changer transitions 0/192 dead transitions. [2024-06-14 11:33:25,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 192 transitions, 2192 flow [2024-06-14 11:33:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:33:25,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-14 11:33:25,833 INFO L175 Difference]: Start difference. First operand has 115 places, 157 transitions, 1648 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:33:25,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 192 transitions, 2192 flow [2024-06-14 11:33:25,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 192 transitions, 2092 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:25,877 INFO L231 Difference]: Finished difference. Result has 119 places, 160 transitions, 1662 flow [2024-06-14 11:33:25,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1662, PETRI_PLACES=119, PETRI_TRANSITIONS=160} [2024-06-14 11:33:25,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-14 11:33:25,877 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 160 transitions, 1662 flow [2024-06-14 11:33:25,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:25,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:25,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:25,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:33:25,878 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:25,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:25,879 INFO L85 PathProgramCache]: Analyzing trace with hash 673635106, now seen corresponding path program 1 times [2024-06-14 11:33:25,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:25,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816926173] [2024-06-14 11:33:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:25,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:25,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:25,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816926173] [2024-06-14 11:33:25,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816926173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:25,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823283728] [2024-06-14 11:33:25,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:25,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:26,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:26,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 160 transitions, 1662 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:26,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:26,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:26,255 INFO L124 PetriNetUnfolderBase]: 1250/2117 cut-off events. [2024-06-14 11:33:26,256 INFO L125 PetriNetUnfolderBase]: For 34922/34922 co-relation queries the response was YES. [2024-06-14 11:33:26,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12206 conditions, 2117 events. 1250/2117 cut-off events. For 34922/34922 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11681 event pairs, 272 based on Foata normal form. 3/2118 useless extension candidates. Maximal degree in co-relation 12148. Up to 1797 conditions per place. [2024-06-14 11:33:26,271 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 166 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-14 11:33:26,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 198 transitions, 2248 flow [2024-06-14 11:33:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:33:26,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:33:26,273 INFO L175 Difference]: Start difference. First operand has 119 places, 160 transitions, 1662 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:33:26,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 198 transitions, 2248 flow [2024-06-14 11:33:26,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 198 transitions, 2180 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:26,317 INFO L231 Difference]: Finished difference. Result has 121 places, 167 transitions, 1747 flow [2024-06-14 11:33:26,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1747, PETRI_PLACES=121, PETRI_TRANSITIONS=167} [2024-06-14 11:33:26,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 11:33:26,317 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 167 transitions, 1747 flow [2024-06-14 11:33:26,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:26,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:26,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:33:26,318 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:26,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash 788921316, now seen corresponding path program 3 times [2024-06-14 11:33:26,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:26,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880979162] [2024-06-14 11:33:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:26,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:26,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880979162] [2024-06-14 11:33:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880979162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:26,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:26,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:26,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109684891] [2024-06-14 11:33:26,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:26,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:26,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:26,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 167 transitions, 1747 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:26,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:26,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:26,708 INFO L124 PetriNetUnfolderBase]: 1303/2195 cut-off events. [2024-06-14 11:33:26,709 INFO L125 PetriNetUnfolderBase]: For 41871/41871 co-relation queries the response was YES. [2024-06-14 11:33:26,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12943 conditions, 2195 events. 1303/2195 cut-off events. For 41871/41871 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12122 event pairs, 282 based on Foata normal form. 14/2200 useless extension candidates. Maximal degree in co-relation 12884. Up to 1640 conditions per place. [2024-06-14 11:33:26,727 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 130 selfloop transitions, 65 changer transitions 0/203 dead transitions. [2024-06-14 11:33:26,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 203 transitions, 2417 flow [2024-06-14 11:33:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 11:33:26,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445182724252492 [2024-06-14 11:33:26,730 INFO L175 Difference]: Start difference. First operand has 121 places, 167 transitions, 1747 flow. Second operand 7 states and 194 transitions. [2024-06-14 11:33:26,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 203 transitions, 2417 flow [2024-06-14 11:33:26,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 203 transitions, 2335 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:26,777 INFO L231 Difference]: Finished difference. Result has 124 places, 170 transitions, 1872 flow [2024-06-14 11:33:26,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1872, PETRI_PLACES=124, PETRI_TRANSITIONS=170} [2024-06-14 11:33:26,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 11:33:26,777 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 170 transitions, 1872 flow [2024-06-14 11:33:26,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:26,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:26,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:33:26,778 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:26,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:26,778 INFO L85 PathProgramCache]: Analyzing trace with hash 954565410, now seen corresponding path program 2 times [2024-06-14 11:33:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:26,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756912143] [2024-06-14 11:33:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:26,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:26,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:26,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756912143] [2024-06-14 11:33:26,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756912143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:26,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:26,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:26,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463750281] [2024-06-14 11:33:26,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:26,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:26,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:26,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:26,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:26,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 170 transitions, 1872 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:26,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:26,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:27,210 INFO L124 PetriNetUnfolderBase]: 1380/2322 cut-off events. [2024-06-14 11:33:27,211 INFO L125 PetriNetUnfolderBase]: For 46082/46082 co-relation queries the response was YES. [2024-06-14 11:33:27,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14248 conditions, 2322 events. 1380/2322 cut-off events. For 46082/46082 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13009 event pairs, 285 based on Foata normal form. 4/2312 useless extension candidates. Maximal degree in co-relation 14187. Up to 1530 conditions per place. [2024-06-14 11:33:27,230 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 117 selfloop transitions, 99 changer transitions 0/224 dead transitions. [2024-06-14 11:33:27,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 224 transitions, 2938 flow [2024-06-14 11:33:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-14 11:33:27,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611295681063123 [2024-06-14 11:33:27,232 INFO L175 Difference]: Start difference. First operand has 124 places, 170 transitions, 1872 flow. Second operand 7 states and 199 transitions. [2024-06-14 11:33:27,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 224 transitions, 2938 flow [2024-06-14 11:33:27,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 224 transitions, 2771 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:27,283 INFO L231 Difference]: Finished difference. Result has 127 places, 191 transitions, 2209 flow [2024-06-14 11:33:27,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=127, PETRI_TRANSITIONS=191} [2024-06-14 11:33:27,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-14 11:33:27,284 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 191 transitions, 2209 flow [2024-06-14 11:33:27,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:27,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:27,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:27,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:33:27,285 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:27,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash 961231650, now seen corresponding path program 3 times [2024-06-14 11:33:27,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:27,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045139640] [2024-06-14 11:33:27,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:27,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:27,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:27,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045139640] [2024-06-14 11:33:27,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045139640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:27,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:27,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:27,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274074984] [2024-06-14 11:33:27,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:27,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:27,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:27,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:27,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:27,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 191 transitions, 2209 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:27,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:27,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:27,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:27,731 INFO L124 PetriNetUnfolderBase]: 1369/2307 cut-off events. [2024-06-14 11:33:27,731 INFO L125 PetriNetUnfolderBase]: For 49796/49796 co-relation queries the response was YES. [2024-06-14 11:33:27,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14594 conditions, 2307 events. 1369/2307 cut-off events. For 49796/49796 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12965 event pairs, 285 based on Foata normal form. 4/2297 useless extension candidates. Maximal degree in co-relation 14531. Up to 1521 conditions per place. [2024-06-14 11:33:27,768 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 101 changer transitions 0/223 dead transitions. [2024-06-14 11:33:27,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 223 transitions, 2977 flow [2024-06-14 11:33:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-14 11:33:27,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654485049833887 [2024-06-14 11:33:27,770 INFO L175 Difference]: Start difference. First operand has 127 places, 191 transitions, 2209 flow. Second operand 7 states and 197 transitions. [2024-06-14 11:33:27,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 223 transitions, 2977 flow [2024-06-14 11:33:27,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 223 transitions, 2833 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:27,831 INFO L231 Difference]: Finished difference. Result has 134 places, 191 transitions, 2277 flow [2024-06-14 11:33:27,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2277, PETRI_PLACES=134, PETRI_TRANSITIONS=191} [2024-06-14 11:33:27,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 11:33:27,832 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 191 transitions, 2277 flow [2024-06-14 11:33:27,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:27,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:27,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:27,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:33:27,832 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:27,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:27,833 INFO L85 PathProgramCache]: Analyzing trace with hash 297580236, now seen corresponding path program 1 times [2024-06-14 11:33:27,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:27,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113943906] [2024-06-14 11:33:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:27,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:27,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:27,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113943906] [2024-06-14 11:33:27,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113943906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:27,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:27,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:27,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093182990] [2024-06-14 11:33:27,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:27,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:27,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:27,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:27,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:27,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:27,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 191 transitions, 2277 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:27,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:27,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:27,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:28,281 INFO L124 PetriNetUnfolderBase]: 1422/2392 cut-off events. [2024-06-14 11:33:28,281 INFO L125 PetriNetUnfolderBase]: For 58029/58029 co-relation queries the response was YES. [2024-06-14 11:33:28,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15389 conditions, 2392 events. 1422/2392 cut-off events. For 58029/58029 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13471 event pairs, 296 based on Foata normal form. 14/2396 useless extension candidates. Maximal degree in co-relation 15323. Up to 1836 conditions per place. [2024-06-14 11:33:28,301 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 159 selfloop transitions, 59 changer transitions 0/226 dead transitions. [2024-06-14 11:33:28,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 226 transitions, 2971 flow [2024-06-14 11:33:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 11:33:28,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-14 11:33:28,302 INFO L175 Difference]: Start difference. First operand has 134 places, 191 transitions, 2277 flow. Second operand 7 states and 192 transitions. [2024-06-14 11:33:28,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 226 transitions, 2971 flow [2024-06-14 11:33:28,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 226 transitions, 2765 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:28,353 INFO L231 Difference]: Finished difference. Result has 136 places, 194 transitions, 2272 flow [2024-06-14 11:33:28,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2272, PETRI_PLACES=136, PETRI_TRANSITIONS=194} [2024-06-14 11:33:28,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 11:33:28,353 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 194 transitions, 2272 flow [2024-06-14 11:33:28,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:28,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:28,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:28,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:33:28,354 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:28,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:28,355 INFO L85 PathProgramCache]: Analyzing trace with hash -170340380, now seen corresponding path program 4 times [2024-06-14 11:33:28,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:28,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826167598] [2024-06-14 11:33:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:28,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:28,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:28,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826167598] [2024-06-14 11:33:28,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826167598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:28,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:28,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:28,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44329188] [2024-06-14 11:33:28,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:28,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:28,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:28,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:28,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:28,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:28,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 194 transitions, 2272 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:28,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:28,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:28,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:28,797 INFO L124 PetriNetUnfolderBase]: 1460/2462 cut-off events. [2024-06-14 11:33:28,797 INFO L125 PetriNetUnfolderBase]: For 60443/60443 co-relation queries the response was YES. [2024-06-14 11:33:28,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15733 conditions, 2462 events. 1460/2462 cut-off events. For 60443/60443 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13980 event pairs, 312 based on Foata normal form. 14/2470 useless extension candidates. Maximal degree in co-relation 15666. Up to 1866 conditions per place. [2024-06-14 11:33:28,817 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 157 selfloop transitions, 61 changer transitions 0/226 dead transitions. [2024-06-14 11:33:28,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 226 transitions, 2972 flow [2024-06-14 11:33:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 11:33:28,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-14 11:33:28,819 INFO L175 Difference]: Start difference. First operand has 136 places, 194 transitions, 2272 flow. Second operand 7 states and 189 transitions. [2024-06-14 11:33:28,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 226 transitions, 2972 flow [2024-06-14 11:33:28,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 226 transitions, 2813 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:28,880 INFO L231 Difference]: Finished difference. Result has 138 places, 197 transitions, 2328 flow [2024-06-14 11:33:28,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2328, PETRI_PLACES=138, PETRI_TRANSITIONS=197} [2024-06-14 11:33:28,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 11:33:28,880 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 197 transitions, 2328 flow [2024-06-14 11:33:28,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:28,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:28,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:28,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:33:28,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:28,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash -779708604, now seen corresponding path program 4 times [2024-06-14 11:33:28,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:28,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713942349] [2024-06-14 11:33:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:28,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:28,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:28,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713942349] [2024-06-14 11:33:28,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713942349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:28,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:28,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:28,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462556257] [2024-06-14 11:33:28,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:28,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:28,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:29,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:29,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 197 transitions, 2328 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:29,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:29,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:29,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:29,326 INFO L124 PetriNetUnfolderBase]: 1539/2598 cut-off events. [2024-06-14 11:33:29,326 INFO L125 PetriNetUnfolderBase]: For 64834/64834 co-relation queries the response was YES. [2024-06-14 11:33:29,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16841 conditions, 2598 events. 1539/2598 cut-off events. For 64834/64834 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14968 event pairs, 320 based on Foata normal form. 4/2596 useless extension candidates. Maximal degree in co-relation 16773. Up to 1742 conditions per place. [2024-06-14 11:33:29,345 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 130 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-14 11:33:29,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 244 transitions, 3466 flow [2024-06-14 11:33:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-14 11:33:29,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-14 11:33:29,346 INFO L175 Difference]: Start difference. First operand has 138 places, 197 transitions, 2328 flow. Second operand 7 states and 196 transitions. [2024-06-14 11:33:29,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 244 transitions, 3466 flow [2024-06-14 11:33:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 244 transitions, 3293 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:29,419 INFO L231 Difference]: Finished difference. Result has 140 places, 215 transitions, 2681 flow [2024-06-14 11:33:29,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2681, PETRI_PLACES=140, PETRI_TRANSITIONS=215} [2024-06-14 11:33:29,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-14 11:33:29,420 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 215 transitions, 2681 flow [2024-06-14 11:33:29,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:29,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:29,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:29,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:33:29,420 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:29,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2054948918, now seen corresponding path program 5 times [2024-06-14 11:33:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724169674] [2024-06-14 11:33:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724169674] [2024-06-14 11:33:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724169674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:29,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:29,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:29,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657082772] [2024-06-14 11:33:29,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:29,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:29,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:29,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:29,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:29,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:29,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 215 transitions, 2681 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:29,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:29,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:29,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:29,902 INFO L124 PetriNetUnfolderBase]: 1530/2586 cut-off events. [2024-06-14 11:33:29,902 INFO L125 PetriNetUnfolderBase]: For 66640/66640 co-relation queries the response was YES. [2024-06-14 11:33:29,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16853 conditions, 2586 events. 1530/2586 cut-off events. For 66640/66640 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14970 event pairs, 320 based on Foata normal form. 4/2584 useless extension candidates. Maximal degree in co-relation 16784. Up to 1736 conditions per place. [2024-06-14 11:33:29,924 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 127 selfloop transitions, 107 changer transitions 0/242 dead transitions. [2024-06-14 11:33:29,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 3423 flow [2024-06-14 11:33:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 11:33:29,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411960132890365 [2024-06-14 11:33:29,926 INFO L175 Difference]: Start difference. First operand has 140 places, 215 transitions, 2681 flow. Second operand 7 states and 193 transitions. [2024-06-14 11:33:29,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 3423 flow [2024-06-14 11:33:30,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 242 transitions, 3261 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-14 11:33:30,012 INFO L231 Difference]: Finished difference. Result has 146 places, 215 transitions, 2743 flow [2024-06-14 11:33:30,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2743, PETRI_PLACES=146, PETRI_TRANSITIONS=215} [2024-06-14 11:33:30,013 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 11:33:30,013 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 215 transitions, 2743 flow [2024-06-14 11:33:30,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:30,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:30,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:30,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:33:30,014 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:30,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:30,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1954681358, now seen corresponding path program 6 times [2024-06-14 11:33:30,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:30,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473806401] [2024-06-14 11:33:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:30,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:30,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473806401] [2024-06-14 11:33:30,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473806401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:30,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:30,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060467730] [2024-06-14 11:33:30,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:30,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:30,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 215 transitions, 2743 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:30,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:30,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:30,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:30,497 INFO L124 PetriNetUnfolderBase]: 1521/2577 cut-off events. [2024-06-14 11:33:30,497 INFO L125 PetriNetUnfolderBase]: For 68564/68564 co-relation queries the response was YES. [2024-06-14 11:33:30,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17003 conditions, 2577 events. 1521/2577 cut-off events. For 68564/68564 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14900 event pairs, 318 based on Foata normal form. 4/2575 useless extension candidates. Maximal degree in co-relation 16932. Up to 1730 conditions per place. [2024-06-14 11:33:30,519 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 127 selfloop transitions, 106 changer transitions 0/241 dead transitions. [2024-06-14 11:33:30,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 3441 flow [2024-06-14 11:33:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 11:33:30,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345514950166113 [2024-06-14 11:33:30,521 INFO L175 Difference]: Start difference. First operand has 146 places, 215 transitions, 2743 flow. Second operand 7 states and 191 transitions. [2024-06-14 11:33:30,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 3441 flow [2024-06-14 11:33:30,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 241 transitions, 3144 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:30,611 INFO L231 Difference]: Finished difference. Result has 147 places, 215 transitions, 2668 flow [2024-06-14 11:33:30,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2668, PETRI_PLACES=147, PETRI_TRANSITIONS=215} [2024-06-14 11:33:30,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-14 11:33:30,612 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 215 transitions, 2668 flow [2024-06-14 11:33:30,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:30,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:30,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:30,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:33:30,613 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:30,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:30,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1601353518, now seen corresponding path program 2 times [2024-06-14 11:33:30,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:30,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137864352] [2024-06-14 11:33:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:30,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:30,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137864352] [2024-06-14 11:33:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137864352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:30,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:30,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271038119] [2024-06-14 11:33:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:30,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:30,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 215 transitions, 2668 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:30,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:30,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:30,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:31,077 INFO L124 PetriNetUnfolderBase]: 1584/2679 cut-off events. [2024-06-14 11:33:31,078 INFO L125 PetriNetUnfolderBase]: For 77268/77268 co-relation queries the response was YES. [2024-06-14 11:33:31,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17419 conditions, 2679 events. 1584/2679 cut-off events. For 77268/77268 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15501 event pairs, 314 based on Foata normal form. 14/2689 useless extension candidates. Maximal degree in co-relation 17348. Up to 2074 conditions per place. [2024-06-14 11:33:31,099 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 182 selfloop transitions, 57 changer transitions 0/247 dead transitions. [2024-06-14 11:33:31,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 247 transitions, 3424 flow [2024-06-14 11:33:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 11:33:31,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312292358803987 [2024-06-14 11:33:31,100 INFO L175 Difference]: Start difference. First operand has 147 places, 215 transitions, 2668 flow. Second operand 7 states and 190 transitions. [2024-06-14 11:33:31,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 247 transitions, 3424 flow [2024-06-14 11:33:31,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 247 transitions, 3212 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:31,195 INFO L231 Difference]: Finished difference. Result has 148 places, 218 transitions, 2661 flow [2024-06-14 11:33:31,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2661, PETRI_PLACES=148, PETRI_TRANSITIONS=218} [2024-06-14 11:33:31,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-14 11:33:31,195 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 218 transitions, 2661 flow [2024-06-14 11:33:31,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:31,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:31,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:31,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:33:31,196 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:31,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1954672430, now seen corresponding path program 3 times [2024-06-14 11:33:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567128921] [2024-06-14 11:33:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567128921] [2024-06-14 11:33:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567128921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:31,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:31,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:31,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333033020] [2024-06-14 11:33:31,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:31,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:31,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:31,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 218 transitions, 2661 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:31,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:31,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:31,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:31,654 INFO L124 PetriNetUnfolderBase]: 1647/2791 cut-off events. [2024-06-14 11:33:31,655 INFO L125 PetriNetUnfolderBase]: For 82484/82484 co-relation queries the response was YES. [2024-06-14 11:33:31,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18064 conditions, 2791 events. 1647/2791 cut-off events. For 82484/82484 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16311 event pairs, 325 based on Foata normal form. 14/2801 useless extension candidates. Maximal degree in co-relation 17992. Up to 2175 conditions per place. [2024-06-14 11:33:31,677 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 56 changer transitions 0/251 dead transitions. [2024-06-14 11:33:31,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 251 transitions, 3497 flow [2024-06-14 11:33:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 11:33:31,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312292358803987 [2024-06-14 11:33:31,679 INFO L175 Difference]: Start difference. First operand has 148 places, 218 transitions, 2661 flow. Second operand 7 states and 190 transitions. [2024-06-14 11:33:31,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 251 transitions, 3497 flow [2024-06-14 11:33:31,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 251 transitions, 3334 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:31,774 INFO L231 Difference]: Finished difference. Result has 150 places, 221 transitions, 2707 flow [2024-06-14 11:33:31,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2707, PETRI_PLACES=150, PETRI_TRANSITIONS=221} [2024-06-14 11:33:31,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 11:33:31,775 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 221 transitions, 2707 flow [2024-06-14 11:33:31,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:31,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:31,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:31,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:33:31,776 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:31,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1944196910, now seen corresponding path program 4 times [2024-06-14 11:33:31,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:31,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962050820] [2024-06-14 11:33:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:31,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:31,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:31,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962050820] [2024-06-14 11:33:31,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962050820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:31,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:31,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:31,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735056561] [2024-06-14 11:33:31,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:31,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:31,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:31,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 221 transitions, 2707 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:31,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:31,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:31,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:32,301 INFO L124 PetriNetUnfolderBase]: 1777/3029 cut-off events. [2024-06-14 11:33:32,301 INFO L125 PetriNetUnfolderBase]: For 94126/94126 co-relation queries the response was YES. [2024-06-14 11:33:32,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19593 conditions, 3029 events. 1777/3029 cut-off events. For 94126/94126 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18183 event pairs, 320 based on Foata normal form. 14/3039 useless extension candidates. Maximal degree in co-relation 19520. Up to 2012 conditions per place. [2024-06-14 11:33:32,327 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 190 selfloop transitions, 63 changer transitions 0/261 dead transitions. [2024-06-14 11:33:32,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 261 transitions, 3687 flow [2024-06-14 11:33:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 11:33:32,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445182724252492 [2024-06-14 11:33:32,330 INFO L175 Difference]: Start difference. First operand has 150 places, 221 transitions, 2707 flow. Second operand 7 states and 194 transitions. [2024-06-14 11:33:32,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 261 transitions, 3687 flow [2024-06-14 11:33:32,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 261 transitions, 3520 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:32,434 INFO L231 Difference]: Finished difference. Result has 153 places, 226 transitions, 2815 flow [2024-06-14 11:33:32,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2815, PETRI_PLACES=153, PETRI_TRANSITIONS=226} [2024-06-14 11:33:32,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-14 11:33:32,442 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 226 transitions, 2815 flow [2024-06-14 11:33:32,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:32,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:32,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:32,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:33:32,443 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:32,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:32,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1002815492, now seen corresponding path program 1 times [2024-06-14 11:33:32,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:32,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694539580] [2024-06-14 11:33:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:32,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:32,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:32,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694539580] [2024-06-14 11:33:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694539580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:32,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825316522] [2024-06-14 11:33:32,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:32,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:32,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 226 transitions, 2815 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) [2024-06-14 11:33:32,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:32,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:32,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:32,915 INFO L124 PetriNetUnfolderBase]: 1787/3041 cut-off events. [2024-06-14 11:33:32,916 INFO L125 PetriNetUnfolderBase]: For 93795/93795 co-relation queries the response was YES. [2024-06-14 11:33:32,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20243 conditions, 3041 events. 1787/3041 cut-off events. For 93795/93795 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18299 event pairs, 390 based on Foata normal form. 2/3034 useless extension candidates. Maximal degree in co-relation 20168. Up to 2574 conditions per place. [2024-06-14 11:33:32,939 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 198 selfloop transitions, 34 changer transitions 0/240 dead transitions. [2024-06-14 11:33:32,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 240 transitions, 3439 flow [2024-06-14 11:33:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 11:33:32,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906976744186047 [2024-06-14 11:33:32,942 INFO L175 Difference]: Start difference. First operand has 153 places, 226 transitions, 2815 flow. Second operand 5 states and 127 transitions. [2024-06-14 11:33:32,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 240 transitions, 3439 flow [2024-06-14 11:33:33,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 240 transitions, 3298 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:33,075 INFO L231 Difference]: Finished difference. Result has 155 places, 230 transitions, 2821 flow [2024-06-14 11:33:33,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2821, PETRI_PLACES=155, PETRI_TRANSITIONS=230} [2024-06-14 11:33:33,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 11:33:33,083 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 230 transitions, 2821 flow [2024-06-14 11:33:33,083 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) [2024-06-14 11:33:33,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:33,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:33,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:33:33,084 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:33,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1002548582, now seen corresponding path program 2 times [2024-06-14 11:33:33,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:33,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516887223] [2024-06-14 11:33:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:33,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:33,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:33,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516887223] [2024-06-14 11:33:33,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516887223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:33,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:33,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:33,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949798551] [2024-06-14 11:33:33,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:33,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:33,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:33,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 230 transitions, 2821 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) [2024-06-14 11:33:33,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:33,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:33,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:33,536 INFO L124 PetriNetUnfolderBase]: 1751/2984 cut-off events. [2024-06-14 11:33:33,536 INFO L125 PetriNetUnfolderBase]: For 93291/93291 co-relation queries the response was YES. [2024-06-14 11:33:33,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19788 conditions, 2984 events. 1751/2984 cut-off events. For 93291/93291 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17830 event pairs, 373 based on Foata normal form. 2/2982 useless extension candidates. Maximal degree in co-relation 19711. Up to 2518 conditions per place. [2024-06-14 11:33:33,560 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 197 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-14 11:33:33,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 242 transitions, 3319 flow [2024-06-14 11:33:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:33:33,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 11:33:33,561 INFO L175 Difference]: Start difference. First operand has 155 places, 230 transitions, 2821 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:33:33,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 242 transitions, 3319 flow [2024-06-14 11:33:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 242 transitions, 3237 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:33,667 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2822 flow [2024-06-14 11:33:33,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2822, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-14 11:33:33,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 11:33:33,668 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2822 flow [2024-06-14 11:33:33,668 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) [2024-06-14 11:33:33,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:33,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:33,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:33:33,668 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:33,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1002825412, now seen corresponding path program 1 times [2024-06-14 11:33:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775437049] [2024-06-14 11:33:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:33,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775437049] [2024-06-14 11:33:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775437049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:33,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:33,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:33,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713045123] [2024-06-14 11:33:33,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:33,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:33,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:33,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2822 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:33,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:33,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:33,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:34,102 INFO L124 PetriNetUnfolderBase]: 1770/3000 cut-off events. [2024-06-14 11:33:34,103 INFO L125 PetriNetUnfolderBase]: For 101083/101083 co-relation queries the response was YES. [2024-06-14 11:33:34,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20032 conditions, 3000 events. 1770/3000 cut-off events. For 101083/101083 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17820 event pairs, 381 based on Foata normal form. 8/2999 useless extension candidates. Maximal degree in co-relation 19955. Up to 2523 conditions per place. [2024-06-14 11:33:34,127 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 196 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2024-06-14 11:33:34,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 245 transitions, 3378 flow [2024-06-14 11:33:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:33:34,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 11:33:34,130 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2822 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:33:34,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 245 transitions, 3378 flow [2024-06-14 11:33:34,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 245 transitions, 3274 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:34,238 INFO L231 Difference]: Finished difference. Result has 158 places, 234 transitions, 2871 flow [2024-06-14 11:33:34,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2871, PETRI_PLACES=158, PETRI_TRANSITIONS=234} [2024-06-14 11:33:34,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 11:33:34,239 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 234 transitions, 2871 flow [2024-06-14 11:33:34,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:34,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:34,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:34,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:33:34,240 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:34,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:34,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1707292665, now seen corresponding path program 1 times [2024-06-14 11:33:34,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:34,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323828687] [2024-06-14 11:33:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:34,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:34,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:34,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323828687] [2024-06-14 11:33:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323828687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:34,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:34,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252155456] [2024-06-14 11:33:34,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:34,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:34,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 234 transitions, 2871 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:34,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:34,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:34,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:34,764 INFO L124 PetriNetUnfolderBase]: 1757/2996 cut-off events. [2024-06-14 11:33:34,764 INFO L125 PetriNetUnfolderBase]: For 99917/99917 co-relation queries the response was YES. [2024-06-14 11:33:34,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 2996 events. 1757/2996 cut-off events. For 99917/99917 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17828 event pairs, 350 based on Foata normal form. 2/2996 useless extension candidates. Maximal degree in co-relation 20086. Up to 2597 conditions per place. [2024-06-14 11:33:34,793 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 234 selfloop transitions, 18 changer transitions 0/260 dead transitions. [2024-06-14 11:33:34,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 260 transitions, 3441 flow [2024-06-14 11:33:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:33:34,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-14 11:33:34,794 INFO L175 Difference]: Start difference. First operand has 158 places, 234 transitions, 2871 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:33:34,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 260 transitions, 3441 flow [2024-06-14 11:33:34,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 260 transitions, 3308 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:34,901 INFO L231 Difference]: Finished difference. Result has 161 places, 234 transitions, 2782 flow [2024-06-14 11:33:34,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2782, PETRI_PLACES=161, PETRI_TRANSITIONS=234} [2024-06-14 11:33:34,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 11:33:34,902 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 234 transitions, 2782 flow [2024-06-14 11:33:34,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:34,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:34,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:34,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:33:34,902 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:34,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2080109449, now seen corresponding path program 2 times [2024-06-14 11:33:34,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892222585] [2024-06-14 11:33:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:34,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892222585] [2024-06-14 11:33:34,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892222585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:34,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:34,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583959425] [2024-06-14 11:33:34,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:35,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:35,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 234 transitions, 2782 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:35,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:35,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:35,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:35,374 INFO L124 PetriNetUnfolderBase]: 1775/3021 cut-off events. [2024-06-14 11:33:35,374 INFO L125 PetriNetUnfolderBase]: For 104781/104781 co-relation queries the response was YES. [2024-06-14 11:33:35,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20230 conditions, 3021 events. 1775/3021 cut-off events. For 104781/104781 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17988 event pairs, 362 based on Foata normal form. 2/3014 useless extension candidates. Maximal degree in co-relation 20151. Up to 2407 conditions per place. [2024-06-14 11:33:35,402 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 180 selfloop transitions, 72 changer transitions 0/260 dead transitions. [2024-06-14 11:33:35,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 260 transitions, 3650 flow [2024-06-14 11:33:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 11:33:35,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6162790697674418 [2024-06-14 11:33:35,403 INFO L175 Difference]: Start difference. First operand has 161 places, 234 transitions, 2782 flow. Second operand 6 states and 159 transitions. [2024-06-14 11:33:35,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 260 transitions, 3650 flow [2024-06-14 11:33:35,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 260 transitions, 3614 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:35,525 INFO L231 Difference]: Finished difference. Result has 161 places, 241 transitions, 3001 flow [2024-06-14 11:33:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3001, PETRI_PLACES=161, PETRI_TRANSITIONS=241} [2024-06-14 11:33:35,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 11:33:35,526 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 241 transitions, 3001 flow [2024-06-14 11:33:35,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:35,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:33:35,526 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:35,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash -300383369, now seen corresponding path program 3 times [2024-06-14 11:33:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495215197] [2024-06-14 11:33:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:35,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495215197] [2024-06-14 11:33:35,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495215197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:35,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:35,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:35,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153821926] [2024-06-14 11:33:35,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:35,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:35,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:35,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 241 transitions, 3001 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:35,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:35,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:35,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:35,960 INFO L124 PetriNetUnfolderBase]: 1763/2980 cut-off events. [2024-06-14 11:33:35,961 INFO L125 PetriNetUnfolderBase]: For 109912/109912 co-relation queries the response was YES. [2024-06-14 11:33:35,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20304 conditions, 2980 events. 1763/2980 cut-off events. For 109912/109912 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17709 event pairs, 397 based on Foata normal form. 4/2970 useless extension candidates. Maximal degree in co-relation 20224. Up to 2399 conditions per place. [2024-06-14 11:33:35,987 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 180 selfloop transitions, 65 changer transitions 0/253 dead transitions. [2024-06-14 11:33:35,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 253 transitions, 3667 flow [2024-06-14 11:33:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:33:35,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 11:33:35,989 INFO L175 Difference]: Start difference. First operand has 161 places, 241 transitions, 3001 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:33:35,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 253 transitions, 3667 flow [2024-06-14 11:33:36,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 253 transitions, 3565 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:36,129 INFO L231 Difference]: Finished difference. Result has 165 places, 241 transitions, 3037 flow [2024-06-14 11:33:36,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3037, PETRI_PLACES=165, PETRI_TRANSITIONS=241} [2024-06-14 11:33:36,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-14 11:33:36,129 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 241 transitions, 3037 flow [2024-06-14 11:33:36,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:36,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:36,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:33:36,130 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:36,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 39774403, now seen corresponding path program 1 times [2024-06-14 11:33:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255661988] [2024-06-14 11:33:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:36,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255661988] [2024-06-14 11:33:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255661988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:36,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:36,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:36,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368302062] [2024-06-14 11:33:36,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:36,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:36,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:36,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:36,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 241 transitions, 3037 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:36,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:36,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:36,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:36,613 INFO L124 PetriNetUnfolderBase]: 1768/3014 cut-off events. [2024-06-14 11:33:36,613 INFO L125 PetriNetUnfolderBase]: For 111573/111573 co-relation queries the response was YES. [2024-06-14 11:33:36,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20523 conditions, 3014 events. 1768/3014 cut-off events. For 111573/111573 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17964 event pairs, 348 based on Foata normal form. 1/3013 useless extension candidates. Maximal degree in co-relation 20442. Up to 2624 conditions per place. [2024-06-14 11:33:36,636 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 233 selfloop transitions, 20 changer transitions 0/261 dead transitions. [2024-06-14 11:33:36,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 261 transitions, 3697 flow [2024-06-14 11:33:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:33:36,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:33:36,640 INFO L175 Difference]: Start difference. First operand has 165 places, 241 transitions, 3037 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:33:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 261 transitions, 3697 flow [2024-06-14 11:33:36,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 261 transitions, 3423 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:36,808 INFO L231 Difference]: Finished difference. Result has 163 places, 244 transitions, 2845 flow [2024-06-14 11:33:36,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2845, PETRI_PLACES=163, PETRI_TRANSITIONS=244} [2024-06-14 11:33:36,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-14 11:33:36,810 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 244 transitions, 2845 flow [2024-06-14 11:33:36,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:36,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:36,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:36,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:33:36,811 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:36,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash -525072785, now seen corresponding path program 2 times [2024-06-14 11:33:36,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786893375] [2024-06-14 11:33:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:36,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:36,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:36,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786893375] [2024-06-14 11:33:36,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786893375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:36,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:36,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:36,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728059254] [2024-06-14 11:33:36,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:36,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:36,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:36,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:36,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 244 transitions, 2845 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) [2024-06-14 11:33:36,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:36,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:36,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:37,254 INFO L124 PetriNetUnfolderBase]: 1765/3002 cut-off events. [2024-06-14 11:33:37,254 INFO L125 PetriNetUnfolderBase]: For 113702/113702 co-relation queries the response was YES. [2024-06-14 11:33:37,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20191 conditions, 3002 events. 1765/3002 cut-off events. For 113702/113702 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17870 event pairs, 355 based on Foata normal form. 1/2996 useless extension candidates. Maximal degree in co-relation 20112. Up to 2621 conditions per place. [2024-06-14 11:33:37,280 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 225 selfloop transitions, 20 changer transitions 0/253 dead transitions. [2024-06-14 11:33:37,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 253 transitions, 3357 flow [2024-06-14 11:33:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 11:33:37,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767441860465117 [2024-06-14 11:33:37,281 INFO L175 Difference]: Start difference. First operand has 163 places, 244 transitions, 2845 flow. Second operand 5 states and 124 transitions. [2024-06-14 11:33:37,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 253 transitions, 3357 flow [2024-06-14 11:33:37,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 253 transitions, 3307 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:37,401 INFO L231 Difference]: Finished difference. Result has 164 places, 244 transitions, 2841 flow [2024-06-14 11:33:37,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2841, PETRI_PLACES=164, PETRI_TRANSITIONS=244} [2024-06-14 11:33:37,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 11:33:37,401 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 244 transitions, 2841 flow [2024-06-14 11:33:37,402 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) [2024-06-14 11:33:37,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:37,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:37,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:33:37,402 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:37,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:37,402 INFO L85 PathProgramCache]: Analyzing trace with hash 367962497, now seen corresponding path program 1 times [2024-06-14 11:33:37,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:37,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708604272] [2024-06-14 11:33:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:37,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:37,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:37,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708604272] [2024-06-14 11:33:37,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708604272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:37,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:37,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:37,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854697410] [2024-06-14 11:33:37,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:37,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:37,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:37,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 244 transitions, 2841 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:37,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:37,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:37,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:38,058 INFO L124 PetriNetUnfolderBase]: 1965/3335 cut-off events. [2024-06-14 11:33:38,058 INFO L125 PetriNetUnfolderBase]: For 153770/153770 co-relation queries the response was YES. [2024-06-14 11:33:38,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23542 conditions, 3335 events. 1965/3335 cut-off events. For 153770/153770 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20309 event pairs, 311 based on Foata normal form. 18/3349 useless extension candidates. Maximal degree in co-relation 23462. Up to 2459 conditions per place. [2024-06-14 11:33:38,094 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 258 selfloop transitions, 30 changer transitions 0/296 dead transitions. [2024-06-14 11:33:38,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 296 transitions, 3933 flow [2024-06-14 11:33:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:33:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:33:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-14 11:33:38,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 11:33:38,095 INFO L175 Difference]: Start difference. First operand has 164 places, 244 transitions, 2841 flow. Second operand 9 states and 234 transitions. [2024-06-14 11:33:38,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 296 transitions, 3933 flow [2024-06-14 11:33:38,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 296 transitions, 3877 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:38,271 INFO L231 Difference]: Finished difference. Result has 169 places, 247 transitions, 2968 flow [2024-06-14 11:33:38,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2968, PETRI_PLACES=169, PETRI_TRANSITIONS=247} [2024-06-14 11:33:38,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 11:33:38,272 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 247 transitions, 2968 flow [2024-06-14 11:33:38,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:38,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:38,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:38,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:33:38,273 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:38,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash 426054947, now seen corresponding path program 2 times [2024-06-14 11:33:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:38,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392772314] [2024-06-14 11:33:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:38,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:38,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392772314] [2024-06-14 11:33:38,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392772314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:38,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:38,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540985649] [2024-06-14 11:33:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:38,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:38,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:38,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:38,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:38,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 247 transitions, 2968 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:38,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:38,914 INFO L124 PetriNetUnfolderBase]: 2072/3530 cut-off events. [2024-06-14 11:33:38,915 INFO L125 PetriNetUnfolderBase]: For 173675/173675 co-relation queries the response was YES. [2024-06-14 11:33:38,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25629 conditions, 3530 events. 2072/3530 cut-off events. For 173675/173675 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21745 event pairs, 423 based on Foata normal form. 18/3546 useless extension candidates. Maximal degree in co-relation 25549. Up to 2797 conditions per place. [2024-06-14 11:33:38,948 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 30 changer transitions 0/295 dead transitions. [2024-06-14 11:33:38,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 295 transitions, 4062 flow [2024-06-14 11:33:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:33:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:33:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-14 11:33:38,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943152454780362 [2024-06-14 11:33:38,949 INFO L175 Difference]: Start difference. First operand has 169 places, 247 transitions, 2968 flow. Second operand 9 states and 230 transitions. [2024-06-14 11:33:38,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 295 transitions, 4062 flow [2024-06-14 11:33:39,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 295 transitions, 3953 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:39,181 INFO L231 Difference]: Finished difference. Result has 173 places, 251 transitions, 3098 flow [2024-06-14 11:33:39,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2867, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3098, PETRI_PLACES=173, PETRI_TRANSITIONS=251} [2024-06-14 11:33:39,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 11:33:39,182 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 251 transitions, 3098 flow [2024-06-14 11:33:39,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:39,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:39,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:39,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:33:39,183 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:39,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1673067171, now seen corresponding path program 3 times [2024-06-14 11:33:39,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:39,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147092390] [2024-06-14 11:33:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:39,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:39,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147092390] [2024-06-14 11:33:39,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147092390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:39,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:39,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:39,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150500153] [2024-06-14 11:33:39,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:39,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:39,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:39,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:39,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 251 transitions, 3098 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:39,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:39,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:39,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:39,819 INFO L124 PetriNetUnfolderBase]: 2026/3460 cut-off events. [2024-06-14 11:33:39,819 INFO L125 PetriNetUnfolderBase]: For 166721/166721 co-relation queries the response was YES. [2024-06-14 11:33:39,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24004 conditions, 3460 events. 2026/3460 cut-off events. For 166721/166721 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21289 event pairs, 420 based on Foata normal form. 24/3482 useless extension candidates. Maximal degree in co-relation 23922. Up to 2898 conditions per place. [2024-06-14 11:33:39,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 256 selfloop transitions, 26 changer transitions 0/290 dead transitions. [2024-06-14 11:33:39,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 290 transitions, 3858 flow [2024-06-14 11:33:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:33:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:33:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 11:33:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:33:39,854 INFO L175 Difference]: Start difference. First operand has 173 places, 251 transitions, 3098 flow. Second operand 9 states and 225 transitions. [2024-06-14 11:33:39,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 290 transitions, 3858 flow [2024-06-14 11:33:40,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 290 transitions, 3704 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:40,068 INFO L231 Difference]: Finished difference. Result has 177 places, 251 transitions, 3004 flow [2024-06-14 11:33:40,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3004, PETRI_PLACES=177, PETRI_TRANSITIONS=251} [2024-06-14 11:33:40,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 11:33:40,069 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 251 transitions, 3004 flow [2024-06-14 11:33:40,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:40,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:40,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:40,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:33:40,070 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:40,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash 971925923, now seen corresponding path program 4 times [2024-06-14 11:33:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:40,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024145145] [2024-06-14 11:33:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:40,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:40,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024145145] [2024-06-14 11:33:40,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024145145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:40,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:40,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:40,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146763550] [2024-06-14 11:33:40,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:40,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:40,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:40,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:40,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:40,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:40,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 251 transitions, 3004 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:40,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:40,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:40,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:40,721 INFO L124 PetriNetUnfolderBase]: 2188/3722 cut-off events. [2024-06-14 11:33:40,721 INFO L125 PetriNetUnfolderBase]: For 201263/201263 co-relation queries the response was YES. [2024-06-14 11:33:40,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24932 conditions, 3722 events. 2188/3722 cut-off events. For 201263/201263 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23076 event pairs, 472 based on Foata normal form. 50/3757 useless extension candidates. Maximal degree in co-relation 24848. Up to 2553 conditions per place. [2024-06-14 11:33:40,752 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 124 changer transitions 3/292 dead transitions. [2024-06-14 11:33:40,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 292 transitions, 4034 flow [2024-06-14 11:33:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 11:33:40,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6482558139534884 [2024-06-14 11:33:40,754 INFO L175 Difference]: Start difference. First operand has 177 places, 251 transitions, 3004 flow. Second operand 8 states and 223 transitions. [2024-06-14 11:33:40,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 292 transitions, 4034 flow [2024-06-14 11:33:40,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 292 transitions, 3974 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:40,985 INFO L231 Difference]: Finished difference. Result has 177 places, 252 transitions, 3281 flow [2024-06-14 11:33:40,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3281, PETRI_PLACES=177, PETRI_TRANSITIONS=252} [2024-06-14 11:33:40,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 11:33:40,986 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 252 transitions, 3281 flow [2024-06-14 11:33:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:40,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:40,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:40,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:33:40,987 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:40,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1790383743, now seen corresponding path program 5 times [2024-06-14 11:33:40,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:40,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946905665] [2024-06-14 11:33:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:41,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:41,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946905665] [2024-06-14 11:33:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946905665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:41,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:41,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:41,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569224646] [2024-06-14 11:33:41,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:41,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:41,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:41,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 252 transitions, 3281 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:41,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:41,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:41,689 INFO L124 PetriNetUnfolderBase]: 2566/4373 cut-off events. [2024-06-14 11:33:41,690 INFO L125 PetriNetUnfolderBase]: For 264705/264705 co-relation queries the response was YES. [2024-06-14 11:33:41,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31154 conditions, 4373 events. 2566/4373 cut-off events. For 264705/264705 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28006 event pairs, 584 based on Foata normal form. 42/4399 useless extension candidates. Maximal degree in co-relation 31069. Up to 2519 conditions per place. [2024-06-14 11:33:41,729 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 162 selfloop transitions, 129 changer transitions 4/303 dead transitions. [2024-06-14 11:33:41,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 303 transitions, 4625 flow [2024-06-14 11:33:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-14 11:33:41,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6656976744186046 [2024-06-14 11:33:41,731 INFO L175 Difference]: Start difference. First operand has 177 places, 252 transitions, 3281 flow. Second operand 8 states and 229 transitions. [2024-06-14 11:33:41,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 303 transitions, 4625 flow [2024-06-14 11:33:42,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 303 transitions, 4313 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:42,058 INFO L231 Difference]: Finished difference. Result has 179 places, 255 transitions, 3407 flow [2024-06-14 11:33:42,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3407, PETRI_PLACES=179, PETRI_TRANSITIONS=255} [2024-06-14 11:33:42,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 11:33:42,059 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 255 transitions, 3407 flow [2024-06-14 11:33:42,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:42,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:42,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:42,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:33:42,060 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:42,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2063392883, now seen corresponding path program 6 times [2024-06-14 11:33:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:42,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53995416] [2024-06-14 11:33:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:42,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:42,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53995416] [2024-06-14 11:33:42,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53995416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:42,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:42,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:42,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339222725] [2024-06-14 11:33:42,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:42,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:42,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:42,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:42,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:42,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 255 transitions, 3407 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:42,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:42,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:42,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:42,729 INFO L124 PetriNetUnfolderBase]: 2439/4171 cut-off events. [2024-06-14 11:33:42,730 INFO L125 PetriNetUnfolderBase]: For 229539/229539 co-relation queries the response was YES. [2024-06-14 11:33:42,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27858 conditions, 4171 events. 2439/4171 cut-off events. For 229539/229539 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26590 event pairs, 595 based on Foata normal form. 50/4206 useless extension candidates. Maximal degree in co-relation 27772. Up to 2982 conditions per place. [2024-06-14 11:33:42,770 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 124 changer transitions 3/295 dead transitions. [2024-06-14 11:33:42,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 295 transitions, 4461 flow [2024-06-14 11:33:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 11:33:42,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6482558139534884 [2024-06-14 11:33:42,771 INFO L175 Difference]: Start difference. First operand has 179 places, 255 transitions, 3407 flow. Second operand 8 states and 223 transitions. [2024-06-14 11:33:42,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 295 transitions, 4461 flow [2024-06-14 11:33:43,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 295 transitions, 4077 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:43,052 INFO L231 Difference]: Finished difference. Result has 182 places, 254 transitions, 3271 flow [2024-06-14 11:33:43,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3271, PETRI_PLACES=182, PETRI_TRANSITIONS=254} [2024-06-14 11:33:43,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 11:33:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 254 transitions, 3271 flow [2024-06-14 11:33:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:43,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:43,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:43,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:33:43,053 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:43,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2071970707, now seen corresponding path program 1 times [2024-06-14 11:33:43,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:43,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411089537] [2024-06-14 11:33:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:43,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:43,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:43,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411089537] [2024-06-14 11:33:43,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411089537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:43,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:43,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:43,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102980120] [2024-06-14 11:33:43,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:43,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:43,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:43,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:43,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:43,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 254 transitions, 3271 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:43,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:43,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:43,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:43,844 INFO L124 PetriNetUnfolderBase]: 2731/4668 cut-off events. [2024-06-14 11:33:43,844 INFO L125 PetriNetUnfolderBase]: For 264721/264721 co-relation queries the response was YES. [2024-06-14 11:33:43,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31125 conditions, 4668 events. 2731/4668 cut-off events. For 264721/264721 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30406 event pairs, 627 based on Foata normal form. 42/4692 useless extension candidates. Maximal degree in co-relation 31038. Up to 2561 conditions per place. [2024-06-14 11:33:43,886 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 132 changer transitions 4/304 dead transitions. [2024-06-14 11:33:43,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 304 transitions, 4611 flow [2024-06-14 11:33:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-14 11:33:43,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-06-14 11:33:43,887 INFO L175 Difference]: Start difference. First operand has 182 places, 254 transitions, 3271 flow. Second operand 8 states and 228 transitions. [2024-06-14 11:33:43,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 304 transitions, 4611 flow [2024-06-14 11:33:44,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 304 transitions, 4305 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:44,160 INFO L231 Difference]: Finished difference. Result has 183 places, 256 transitions, 3360 flow [2024-06-14 11:33:44,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3360, PETRI_PLACES=183, PETRI_TRANSITIONS=256} [2024-06-14 11:33:44,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-14 11:33:44,161 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 256 transitions, 3360 flow [2024-06-14 11:33:44,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:44,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:44,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:44,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:33:44,161 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:44,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:44,162 INFO L85 PathProgramCache]: Analyzing trace with hash 572648441, now seen corresponding path program 1 times [2024-06-14 11:33:44,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:44,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444106538] [2024-06-14 11:33:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:44,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:44,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444106538] [2024-06-14 11:33:44,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444106538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:44,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:44,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:44,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684959729] [2024-06-14 11:33:44,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:44,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:44,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:44,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:44,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:44,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 256 transitions, 3360 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:44,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:44,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:44,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:44,833 INFO L124 PetriNetUnfolderBase]: 2719/4647 cut-off events. [2024-06-14 11:33:44,834 INFO L125 PetriNetUnfolderBase]: For 230887/230887 co-relation queries the response was YES. [2024-06-14 11:33:44,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30812 conditions, 4647 events. 2719/4647 cut-off events. For 230887/230887 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30220 event pairs, 748 based on Foata normal form. 2/4643 useless extension candidates. Maximal degree in co-relation 30724. Up to 4084 conditions per place. [2024-06-14 11:33:44,875 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 55 changer transitions 0/277 dead transitions. [2024-06-14 11:33:44,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 277 transitions, 4125 flow [2024-06-14 11:33:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:33:44,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007751937984496 [2024-06-14 11:33:44,876 INFO L175 Difference]: Start difference. First operand has 183 places, 256 transitions, 3360 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:33:44,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 277 transitions, 4125 flow [2024-06-14 11:33:45,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 277 transitions, 3865 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:45,258 INFO L231 Difference]: Finished difference. Result has 186 places, 263 transitions, 3369 flow [2024-06-14 11:33:45,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3104, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3369, PETRI_PLACES=186, PETRI_TRANSITIONS=263} [2024-06-14 11:33:45,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 11:33:45,258 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 263 transitions, 3369 flow [2024-06-14 11:33:45,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:45,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:45,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:45,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:33:45,259 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:45,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2054002041, now seen corresponding path program 2 times [2024-06-14 11:33:45,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:45,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681741300] [2024-06-14 11:33:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:45,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:45,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:45,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681741300] [2024-06-14 11:33:45,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681741300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:45,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:45,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806692962] [2024-06-14 11:33:45,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:45,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:45,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:45,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 263 transitions, 3369 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:45,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:45,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:45,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:45,893 INFO L124 PetriNetUnfolderBase]: 2729/4642 cut-off events. [2024-06-14 11:33:45,894 INFO L125 PetriNetUnfolderBase]: For 232368/232368 co-relation queries the response was YES. [2024-06-14 11:33:45,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30777 conditions, 4642 events. 2729/4642 cut-off events. For 232368/232368 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30114 event pairs, 787 based on Foata normal form. 2/4630 useless extension candidates. Maximal degree in co-relation 30686. Up to 3995 conditions per place. [2024-06-14 11:33:45,937 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 193 selfloop transitions, 79 changer transitions 0/280 dead transitions. [2024-06-14 11:33:45,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 280 transitions, 4296 flow [2024-06-14 11:33:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 11:33:45,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-14 11:33:45,939 INFO L175 Difference]: Start difference. First operand has 186 places, 263 transitions, 3369 flow. Second operand 6 states and 154 transitions. [2024-06-14 11:33:45,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 280 transitions, 4296 flow [2024-06-14 11:33:46,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 280 transitions, 4198 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:46,269 INFO L231 Difference]: Finished difference. Result has 188 places, 267 transitions, 3507 flow [2024-06-14 11:33:46,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3507, PETRI_PLACES=188, PETRI_TRANSITIONS=267} [2024-06-14 11:33:46,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-14 11:33:46,270 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 267 transitions, 3507 flow [2024-06-14 11:33:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:46,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:46,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:46,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:33:46,271 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:46,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash 351563335, now seen corresponding path program 3 times [2024-06-14 11:33:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:46,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573381107] [2024-06-14 11:33:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:46,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:46,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573381107] [2024-06-14 11:33:46,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573381107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:46,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:46,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982723531] [2024-06-14 11:33:46,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:46,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:46,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:46,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 267 transitions, 3507 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:46,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:46,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:46,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:47,013 INFO L124 PetriNetUnfolderBase]: 2731/4647 cut-off events. [2024-06-14 11:33:47,013 INFO L125 PetriNetUnfolderBase]: For 232214/232214 co-relation queries the response was YES. [2024-06-14 11:33:47,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30865 conditions, 4647 events. 2731/4647 cut-off events. For 232214/232214 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30151 event pairs, 788 based on Foata normal form. 2/4635 useless extension candidates. Maximal degree in co-relation 30774. Up to 3999 conditions per place. [2024-06-14 11:33:47,062 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 196 selfloop transitions, 78 changer transitions 0/282 dead transitions. [2024-06-14 11:33:47,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 282 transitions, 4327 flow [2024-06-14 11:33:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:33:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 11:33:47,064 INFO L175 Difference]: Start difference. First operand has 188 places, 267 transitions, 3507 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:33:47,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 282 transitions, 4327 flow [2024-06-14 11:33:47,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 282 transitions, 4104 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:47,468 INFO L231 Difference]: Finished difference. Result has 190 places, 270 transitions, 3500 flow [2024-06-14 11:33:47,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3500, PETRI_PLACES=190, PETRI_TRANSITIONS=270} [2024-06-14 11:33:47,468 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-14 11:33:47,468 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 270 transitions, 3500 flow [2024-06-14 11:33:47,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:47,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:47,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:47,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:33:47,474 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:47,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1222393937, now seen corresponding path program 7 times [2024-06-14 11:33:47,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126068176] [2024-06-14 11:33:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:47,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126068176] [2024-06-14 11:33:47,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126068176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:47,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:47,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:47,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815405602] [2024-06-14 11:33:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:47,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:47,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:47,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:47,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 270 transitions, 3500 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:47,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:47,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:47,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:48,339 INFO L124 PetriNetUnfolderBase]: 2893/4949 cut-off events. [2024-06-14 11:33:48,339 INFO L125 PetriNetUnfolderBase]: For 300688/300688 co-relation queries the response was YES. [2024-06-14 11:33:48,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32534 conditions, 4949 events. 2893/4949 cut-off events. For 300688/300688 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32636 event pairs, 831 based on Foata normal form. 50/4993 useless extension candidates. Maximal degree in co-relation 32442. Up to 3710 conditions per place. [2024-06-14 11:33:48,388 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 177 selfloop transitions, 119 changer transitions 3/307 dead transitions. [2024-06-14 11:33:48,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 307 transitions, 4492 flow [2024-06-14 11:33:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-14 11:33:48,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2024-06-14 11:33:48,389 INFO L175 Difference]: Start difference. First operand has 190 places, 270 transitions, 3500 flow. Second operand 8 states and 219 transitions. [2024-06-14 11:33:48,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 307 transitions, 4492 flow [2024-06-14 11:33:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 307 transitions, 4354 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:48,761 INFO L231 Difference]: Finished difference. Result has 195 places, 271 transitions, 3697 flow [2024-06-14 11:33:48,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3697, PETRI_PLACES=195, PETRI_TRANSITIONS=271} [2024-06-14 11:33:48,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-14 11:33:48,761 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 271 transitions, 3697 flow [2024-06-14 11:33:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:48,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:48,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:33:48,762 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:48,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash -879025771, now seen corresponding path program 8 times [2024-06-14 11:33:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:48,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354331692] [2024-06-14 11:33:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:48,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354331692] [2024-06-14 11:33:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354331692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:48,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:48,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351618685] [2024-06-14 11:33:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:48,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:48,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:48,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 271 transitions, 3697 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:48,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:48,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:48,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:49,602 INFO L124 PetriNetUnfolderBase]: 3045/5215 cut-off events. [2024-06-14 11:33:49,602 INFO L125 PetriNetUnfolderBase]: For 323860/323860 co-relation queries the response was YES. [2024-06-14 11:33:49,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34553 conditions, 5215 events. 3045/5215 cut-off events. For 323860/323860 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34750 event pairs, 886 based on Foata normal form. 50/5259 useless extension candidates. Maximal degree in co-relation 34460. Up to 3966 conditions per place. [2024-06-14 11:33:49,655 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 178 selfloop transitions, 119 changer transitions 3/308 dead transitions. [2024-06-14 11:33:49,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 308 transitions, 4699 flow [2024-06-14 11:33:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 11:33:49,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2024-06-14 11:33:49,661 INFO L175 Difference]: Start difference. First operand has 195 places, 271 transitions, 3697 flow. Second operand 8 states and 218 transitions. [2024-06-14 11:33:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 308 transitions, 4699 flow [2024-06-14 11:33:50,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 308 transitions, 4387 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:50,079 INFO L231 Difference]: Finished difference. Result has 197 places, 272 transitions, 3724 flow [2024-06-14 11:33:50,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3724, PETRI_PLACES=197, PETRI_TRANSITIONS=272} [2024-06-14 11:33:50,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 11:33:50,080 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 272 transitions, 3724 flow [2024-06-14 11:33:50,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:50,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:50,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:50,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:33:50,081 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:50,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:50,081 INFO L85 PathProgramCache]: Analyzing trace with hash 867917905, now seen corresponding path program 9 times [2024-06-14 11:33:50,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:50,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301689163] [2024-06-14 11:33:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:50,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:50,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:50,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301689163] [2024-06-14 11:33:50,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301689163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:50,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:50,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:50,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270083691] [2024-06-14 11:33:50,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:50,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:50,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:50,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:50,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 272 transitions, 3724 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:50,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:50,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:50,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:50,971 INFO L124 PetriNetUnfolderBase]: 3398/5818 cut-off events. [2024-06-14 11:33:50,971 INFO L125 PetriNetUnfolderBase]: For 391452/391452 co-relation queries the response was YES. [2024-06-14 11:33:51,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39759 conditions, 5818 events. 3398/5818 cut-off events. For 391452/391452 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 39496 event pairs, 971 based on Foata normal form. 42/5854 useless extension candidates. Maximal degree in co-relation 39665. Up to 3646 conditions per place. [2024-06-14 11:33:51,138 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 126 changer transitions 4/319 dead transitions. [2024-06-14 11:33:51,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 319 transitions, 5070 flow [2024-06-14 11:33:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-14 11:33:51,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-14 11:33:51,139 INFO L175 Difference]: Start difference. First operand has 197 places, 272 transitions, 3724 flow. Second operand 8 states and 224 transitions. [2024-06-14 11:33:51,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 319 transitions, 5070 flow [2024-06-14 11:33:51,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 319 transitions, 4754 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:51,676 INFO L231 Difference]: Finished difference. Result has 199 places, 275 transitions, 3863 flow [2024-06-14 11:33:51,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3863, PETRI_PLACES=199, PETRI_TRANSITIONS=275} [2024-06-14 11:33:51,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-14 11:33:51,677 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 275 transitions, 3863 flow [2024-06-14 11:33:51,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:51,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:51,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:33:51,678 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:51,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2128518975, now seen corresponding path program 10 times [2024-06-14 11:33:51,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:51,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299757763] [2024-06-14 11:33:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:51,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:51,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:51,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299757763] [2024-06-14 11:33:51,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299757763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:51,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:51,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514717580] [2024-06-14 11:33:51,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:51,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:51,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:51,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 275 transitions, 3863 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:51,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:51,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:51,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:52,688 INFO L124 PetriNetUnfolderBase]: 3296/5664 cut-off events. [2024-06-14 11:33:52,688 INFO L125 PetriNetUnfolderBase]: For 343976/343976 co-relation queries the response was YES. [2024-06-14 11:33:52,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36248 conditions, 5664 events. 3296/5664 cut-off events. For 343976/343976 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38434 event pairs, 1008 based on Foata normal form. 50/5708 useless extension candidates. Maximal degree in co-relation 36153. Up to 4353 conditions per place. [2024-06-14 11:33:52,744 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 185 selfloop transitions, 118 changer transitions 0/311 dead transitions. [2024-06-14 11:33:52,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 311 transitions, 4887 flow [2024-06-14 11:33:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 11:33:52,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2024-06-14 11:33:52,745 INFO L175 Difference]: Start difference. First operand has 199 places, 275 transitions, 3863 flow. Second operand 8 states and 218 transitions. [2024-06-14 11:33:52,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 311 transitions, 4887 flow [2024-06-14 11:33:53,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 311 transitions, 4564 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:53,290 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3785 flow [2024-06-14 11:33:53,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-14 11:33:53,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 11:33:53,290 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3785 flow [2024-06-14 11:33:53,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:53,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:53,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:53,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:33:53,291 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:53,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 449674685, now seen corresponding path program 2 times [2024-06-14 11:33:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:53,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29627237] [2024-06-14 11:33:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:53,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:53,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:53,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29627237] [2024-06-14 11:33:53,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29627237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:53,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:53,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:53,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675005077] [2024-06-14 11:33:53,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:53,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:53,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:53,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:53,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3785 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:53,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:53,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:53,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:54,171 INFO L124 PetriNetUnfolderBase]: 3425/5913 cut-off events. [2024-06-14 11:33:54,171 INFO L125 PetriNetUnfolderBase]: For 336038/336038 co-relation queries the response was YES. [2024-06-14 11:33:54,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37031 conditions, 5913 events. 3425/5913 cut-off events. For 336038/336038 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40662 event pairs, 1010 based on Foata normal form. 42/5949 useless extension candidates. Maximal degree in co-relation 36934. Up to 4115 conditions per place. [2024-06-14 11:33:54,224 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 182 selfloop transitions, 122 changer transitions 6/318 dead transitions. [2024-06-14 11:33:54,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 318 transitions, 4859 flow [2024-06-14 11:33:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 11:33:54,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6482558139534884 [2024-06-14 11:33:54,226 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3785 flow. Second operand 8 states and 223 transitions. [2024-06-14 11:33:54,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 318 transitions, 4859 flow [2024-06-14 11:33:54,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 318 transitions, 4599 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:54,758 INFO L231 Difference]: Finished difference. Result has 204 places, 276 transitions, 3869 flow [2024-06-14 11:33:54,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3869, PETRI_PLACES=204, PETRI_TRANSITIONS=276} [2024-06-14 11:33:54,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-14 11:33:54,758 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 276 transitions, 3869 flow [2024-06-14 11:33:54,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:54,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:54,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:33:54,759 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:54,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1539478671, now seen corresponding path program 3 times [2024-06-14 11:33:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:54,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289976491] [2024-06-14 11:33:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:54,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:54,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289976491] [2024-06-14 11:33:54,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289976491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:54,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:54,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:54,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422250070] [2024-06-14 11:33:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:54,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:54,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 276 transitions, 3869 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:54,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:54,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:55,865 INFO L124 PetriNetUnfolderBase]: 3546/6158 cut-off events. [2024-06-14 11:33:55,866 INFO L125 PetriNetUnfolderBase]: For 356309/356309 co-relation queries the response was YES. [2024-06-14 11:33:55,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38457 conditions, 6158 events. 3546/6158 cut-off events. For 356309/356309 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42923 event pairs, 1071 based on Foata normal form. 42/6194 useless extension candidates. Maximal degree in co-relation 38359. Up to 4444 conditions per place. [2024-06-14 11:33:55,915 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 191 selfloop transitions, 121 changer transitions 0/320 dead transitions. [2024-06-14 11:33:55,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 320 transitions, 5065 flow [2024-06-14 11:33:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 11:33:55,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6482558139534884 [2024-06-14 11:33:55,917 INFO L175 Difference]: Start difference. First operand has 204 places, 276 transitions, 3869 flow. Second operand 8 states and 223 transitions. [2024-06-14 11:33:55,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 320 transitions, 5065 flow [2024-06-14 11:33:56,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 320 transitions, 4730 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:56,472 INFO L231 Difference]: Finished difference. Result has 206 places, 278 transitions, 3897 flow [2024-06-14 11:33:56,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3897, PETRI_PLACES=206, PETRI_TRANSITIONS=278} [2024-06-14 11:33:56,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-14 11:33:56,473 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 278 transitions, 3897 flow [2024-06-14 11:33:56,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:56,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:56,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:33:56,473 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:56,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:56,474 INFO L85 PathProgramCache]: Analyzing trace with hash -62438543, now seen corresponding path program 4 times [2024-06-14 11:33:56,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:56,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727904537] [2024-06-14 11:33:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:56,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:56,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727904537] [2024-06-14 11:33:56,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727904537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:56,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:56,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075956589] [2024-06-14 11:33:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:56,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:56,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:56,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 278 transitions, 3897 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:56,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:56,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:56,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:57,488 INFO L124 PetriNetUnfolderBase]: 3763/6554 cut-off events. [2024-06-14 11:33:57,488 INFO L125 PetriNetUnfolderBase]: For 391983/391983 co-relation queries the response was YES. [2024-06-14 11:33:57,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40341 conditions, 6554 events. 3763/6554 cut-off events. For 391983/391983 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46482 event pairs, 1104 based on Foata normal form. 42/6590 useless extension candidates. Maximal degree in co-relation 40242. Up to 3049 conditions per place. [2024-06-14 11:33:57,548 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 130 changer transitions 0/325 dead transitions. [2024-06-14 11:33:57,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 325 transitions, 5097 flow [2024-06-14 11:33:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-14 11:33:57,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540697674418605 [2024-06-14 11:33:57,549 INFO L175 Difference]: Start difference. First operand has 206 places, 278 transitions, 3897 flow. Second operand 8 states and 225 transitions. [2024-06-14 11:33:57,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 325 transitions, 5097 flow [2024-06-14 11:33:58,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 325 transitions, 4764 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:58,152 INFO L231 Difference]: Finished difference. Result has 207 places, 278 transitions, 3795 flow [2024-06-14 11:33:58,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3795, PETRI_PLACES=207, PETRI_TRANSITIONS=278} [2024-06-14 11:33:58,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 11:33:58,153 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 278 transitions, 3795 flow [2024-06-14 11:33:58,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:58,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:58,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:58,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:33:58,154 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:58,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1626383011, now seen corresponding path program 1 times [2024-06-14 11:33:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:58,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870018690] [2024-06-14 11:33:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:58,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:58,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870018690] [2024-06-14 11:33:58,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870018690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:58,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:58,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:58,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8660312] [2024-06-14 11:33:58,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:58,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:58,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:58,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:58,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:58,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 278 transitions, 3795 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:58,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:58,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:58,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:59,262 INFO L124 PetriNetUnfolderBase]: 3779/6572 cut-off events. [2024-06-14 11:33:59,262 INFO L125 PetriNetUnfolderBase]: For 341806/341806 co-relation queries the response was YES. [2024-06-14 11:33:59,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40369 conditions, 6572 events. 3779/6572 cut-off events. For 341806/341806 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46599 event pairs, 1308 based on Foata normal form. 4/6567 useless extension candidates. Maximal degree in co-relation 40269. Up to 5930 conditions per place. [2024-06-14 11:33:59,331 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 245 selfloop transitions, 39 changer transitions 0/292 dead transitions. [2024-06-14 11:33:59,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 292 transitions, 4437 flow [2024-06-14 11:33:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:33:59,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 11:33:59,333 INFO L175 Difference]: Start difference. First operand has 207 places, 278 transitions, 3795 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:33:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 292 transitions, 4437 flow [2024-06-14 11:33:59,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 292 transitions, 4082 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:59,784 INFO L231 Difference]: Finished difference. Result has 207 places, 281 transitions, 3578 flow [2024-06-14 11:33:59,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3578, PETRI_PLACES=207, PETRI_TRANSITIONS=281} [2024-06-14 11:33:59,785 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 11:33:59,785 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 281 transitions, 3578 flow [2024-06-14 11:33:59,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:59,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:59,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:59,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:33:59,785 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:59,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash 971606057, now seen corresponding path program 2 times [2024-06-14 11:33:59,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:59,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940318918] [2024-06-14 11:33:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:59,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940318918] [2024-06-14 11:33:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940318918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:59,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110599222] [2024-06-14 11:33:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:59,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:33:59,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 281 transitions, 3578 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:59,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:59,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:33:59,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:00,623 INFO L124 PetriNetUnfolderBase]: 3655/6362 cut-off events. [2024-06-14 11:34:00,623 INFO L125 PetriNetUnfolderBase]: For 295680/295680 co-relation queries the response was YES. [2024-06-14 11:34:00,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37326 conditions, 6362 events. 3655/6362 cut-off events. For 295680/295680 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 44736 event pairs, 1215 based on Foata normal form. 4/6357 useless extension candidates. Maximal degree in co-relation 37225. Up to 5690 conditions per place. [2024-06-14 11:34:00,684 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 245 selfloop transitions, 43 changer transitions 0/296 dead transitions. [2024-06-14 11:34:00,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 296 transitions, 4236 flow [2024-06-14 11:34:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:34:00,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 11:34:00,685 INFO L175 Difference]: Start difference. First operand has 207 places, 281 transitions, 3578 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:34:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 296 transitions, 4236 flow [2024-06-14 11:34:01,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 296 transitions, 4120 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:01,349 INFO L231 Difference]: Finished difference. Result has 209 places, 284 transitions, 3614 flow [2024-06-14 11:34:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3462, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3614, PETRI_PLACES=209, PETRI_TRANSITIONS=284} [2024-06-14 11:34:01,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 11:34:01,350 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 284 transitions, 3614 flow [2024-06-14 11:34:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:01,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:01,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:34:01,350 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:01,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1233007795, now seen corresponding path program 1 times [2024-06-14 11:34:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678622203] [2024-06-14 11:34:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678622203] [2024-06-14 11:34:01,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678622203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:01,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:01,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259562949] [2024-06-14 11:34:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:01,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:01,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:01,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 284 transitions, 3614 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:01,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:01,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:01,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:02,310 INFO L124 PetriNetUnfolderBase]: 3683/6423 cut-off events. [2024-06-14 11:34:02,310 INFO L125 PetriNetUnfolderBase]: For 304900/304900 co-relation queries the response was YES. [2024-06-14 11:34:02,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37960 conditions, 6423 events. 3683/6423 cut-off events. For 304900/304900 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45213 event pairs, 1206 based on Foata normal form. 2/6421 useless extension candidates. Maximal degree in co-relation 37858. Up to 5648 conditions per place. [2024-06-14 11:34:02,372 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 61 changer transitions 0/312 dead transitions. [2024-06-14 11:34:02,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 312 transitions, 4725 flow [2024-06-14 11:34:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:34:02,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 11:34:02,374 INFO L175 Difference]: Start difference. First operand has 209 places, 284 transitions, 3614 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:34:02,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 312 transitions, 4725 flow [2024-06-14 11:34:02,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 312 transitions, 4595 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:02,982 INFO L231 Difference]: Finished difference. Result has 213 places, 292 transitions, 3736 flow [2024-06-14 11:34:02,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3736, PETRI_PLACES=213, PETRI_TRANSITIONS=292} [2024-06-14 11:34:02,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 11:34:02,983 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 292 transitions, 3736 flow [2024-06-14 11:34:02,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:02,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:02,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:02,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:34:02,983 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:02,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:02,983 INFO L85 PathProgramCache]: Analyzing trace with hash -811985237, now seen corresponding path program 2 times [2024-06-14 11:34:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112728510] [2024-06-14 11:34:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:03,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112728510] [2024-06-14 11:34:03,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112728510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:03,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:03,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:03,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132019116] [2024-06-14 11:34:03,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:03,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:03,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:03,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 292 transitions, 3736 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:03,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:03,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:03,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:03,890 INFO L124 PetriNetUnfolderBase]: 3693/6415 cut-off events. [2024-06-14 11:34:03,890 INFO L125 PetriNetUnfolderBase]: For 315477/315477 co-relation queries the response was YES. [2024-06-14 11:34:03,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38244 conditions, 6415 events. 3693/6415 cut-off events. For 315477/315477 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45067 event pairs, 1235 based on Foata normal form. 2/6401 useless extension candidates. Maximal degree in co-relation 38140. Up to 5658 conditions per place. [2024-06-14 11:34:03,953 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 233 selfloop transitions, 68 changer transitions 0/309 dead transitions. [2024-06-14 11:34:03,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 309 transitions, 4788 flow [2024-06-14 11:34:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:34:03,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 11:34:03,954 INFO L175 Difference]: Start difference. First operand has 213 places, 292 transitions, 3736 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:34:03,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 309 transitions, 4788 flow [2024-06-14 11:34:04,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 309 transitions, 4673 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:04,763 INFO L231 Difference]: Finished difference. Result has 216 places, 296 transitions, 3830 flow [2024-06-14 11:34:04,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3830, PETRI_PLACES=216, PETRI_TRANSITIONS=296} [2024-06-14 11:34:04,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 11:34:04,764 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 296 transitions, 3830 flow [2024-06-14 11:34:04,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:04,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:04,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:04,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:34:04,765 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:04,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1236726865, now seen corresponding path program 3 times [2024-06-14 11:34:04,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:04,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965887017] [2024-06-14 11:34:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:04,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:04,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965887017] [2024-06-14 11:34:04,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965887017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:04,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:04,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:04,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204750749] [2024-06-14 11:34:04,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:04,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:04,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:04,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:04,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:04,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 296 transitions, 3830 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:04,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:04,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:04,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:05,619 INFO L124 PetriNetUnfolderBase]: 3689/6411 cut-off events. [2024-06-14 11:34:05,619 INFO L125 PetriNetUnfolderBase]: For 321720/321720 co-relation queries the response was YES. [2024-06-14 11:34:05,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38224 conditions, 6411 events. 3689/6411 cut-off events. For 321720/321720 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45109 event pairs, 1235 based on Foata normal form. 2/6397 useless extension candidates. Maximal degree in co-relation 38118. Up to 5656 conditions per place. [2024-06-14 11:34:05,684 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 238 selfloop transitions, 63 changer transitions 0/309 dead transitions. [2024-06-14 11:34:05,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 309 transitions, 4822 flow [2024-06-14 11:34:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:34:05,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 11:34:05,685 INFO L175 Difference]: Start difference. First operand has 216 places, 296 transitions, 3830 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:34:05,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 309 transitions, 4822 flow [2024-06-14 11:34:06,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 309 transitions, 4646 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:06,373 INFO L231 Difference]: Finished difference. Result has 218 places, 296 transitions, 3788 flow [2024-06-14 11:34:06,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3788, PETRI_PLACES=218, PETRI_TRANSITIONS=296} [2024-06-14 11:34:06,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 11:34:06,374 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 296 transitions, 3788 flow [2024-06-14 11:34:06,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:06,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:06,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:06,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:34:06,374 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:06,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:06,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1743362405, now seen corresponding path program 4 times [2024-06-14 11:34:06,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:06,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983412312] [2024-06-14 11:34:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:06,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:06,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:06,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983412312] [2024-06-14 11:34:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983412312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:06,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:06,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:06,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717423983] [2024-06-14 11:34:06,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:06,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:06,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:06,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:06,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:06,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:06,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 296 transitions, 3788 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:06,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:06,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:06,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:07,308 INFO L124 PetriNetUnfolderBase]: 3699/6451 cut-off events. [2024-06-14 11:34:07,308 INFO L125 PetriNetUnfolderBase]: For 330365/330365 co-relation queries the response was YES. [2024-06-14 11:34:07,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38428 conditions, 6451 events. 3699/6451 cut-off events. For 330365/330365 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45469 event pairs, 1215 based on Foata normal form. 2/6449 useless extension candidates. Maximal degree in co-relation 38323. Up to 5666 conditions per place. [2024-06-14 11:34:07,372 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 241 selfloop transitions, 68 changer transitions 1/318 dead transitions. [2024-06-14 11:34:07,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 318 transitions, 4761 flow [2024-06-14 11:34:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:34:07,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2024-06-14 11:34:07,373 INFO L175 Difference]: Start difference. First operand has 218 places, 296 transitions, 3788 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:34:07,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 318 transitions, 4761 flow [2024-06-14 11:34:08,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 318 transitions, 4548 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 11:34:08,031 INFO L231 Difference]: Finished difference. Result has 217 places, 299 transitions, 3770 flow [2024-06-14 11:34:08,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3770, PETRI_PLACES=217, PETRI_TRANSITIONS=299} [2024-06-14 11:34:08,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 11:34:08,032 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 299 transitions, 3770 flow [2024-06-14 11:34:08,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:08,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:08,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:08,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:34:08,032 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:08,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1633048259, now seen corresponding path program 5 times [2024-06-14 11:34:08,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:08,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641195366] [2024-06-14 11:34:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:08,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:08,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641195366] [2024-06-14 11:34:08,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641195366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:08,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:08,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750580691] [2024-06-14 11:34:08,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:08,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:08,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 299 transitions, 3770 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:08,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:08,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:08,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:08,913 INFO L124 PetriNetUnfolderBase]: 3707/6454 cut-off events. [2024-06-14 11:34:08,913 INFO L125 PetriNetUnfolderBase]: For 340377/340377 co-relation queries the response was YES. [2024-06-14 11:34:08,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38578 conditions, 6454 events. 3707/6454 cut-off events. For 340377/340377 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45599 event pairs, 1245 based on Foata normal form. 2/6443 useless extension candidates. Maximal degree in co-relation 38475. Up to 5676 conditions per place. [2024-06-14 11:34:08,978 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 234 selfloop transitions, 72 changer transitions 1/315 dead transitions. [2024-06-14 11:34:08,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 315 transitions, 4727 flow [2024-06-14 11:34:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:34:08,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 11:34:08,979 INFO L175 Difference]: Start difference. First operand has 217 places, 299 transitions, 3770 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:34:08,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 315 transitions, 4727 flow [2024-06-14 11:34:09,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 315 transitions, 4617 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:09,736 INFO L231 Difference]: Finished difference. Result has 220 places, 302 transitions, 3858 flow [2024-06-14 11:34:09,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3858, PETRI_PLACES=220, PETRI_TRANSITIONS=302} [2024-06-14 11:34:09,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 11:34:09,737 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 302 transitions, 3858 flow [2024-06-14 11:34:09,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:09,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:09,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:09,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:34:09,737 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:09,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:09,738 INFO L85 PathProgramCache]: Analyzing trace with hash -346553125, now seen corresponding path program 6 times [2024-06-14 11:34:09,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540788960] [2024-06-14 11:34:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540788960] [2024-06-14 11:34:09,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540788960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:09,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:09,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:09,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85199894] [2024-06-14 11:34:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:09,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:09,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 302 transitions, 3858 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:09,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:09,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:09,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:10,596 INFO L124 PetriNetUnfolderBase]: 3638/6331 cut-off events. [2024-06-14 11:34:10,601 INFO L125 PetriNetUnfolderBase]: For 345408/345408 co-relation queries the response was YES. [2024-06-14 11:34:10,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38083 conditions, 6331 events. 3638/6331 cut-off events. For 345408/345408 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44350 event pairs, 1171 based on Foata normal form. 2/6329 useless extension candidates. Maximal degree in co-relation 37979. Up to 5550 conditions per place. [2024-06-14 11:34:10,666 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 235 selfloop transitions, 70 changer transitions 3/316 dead transitions. [2024-06-14 11:34:10,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 316 transitions, 4634 flow [2024-06-14 11:34:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:34:10,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 11:34:10,668 INFO L175 Difference]: Start difference. First operand has 220 places, 302 transitions, 3858 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:34:10,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 316 transitions, 4634 flow [2024-06-14 11:34:11,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 316 transitions, 4476 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:11,438 INFO L231 Difference]: Finished difference. Result has 222 places, 299 transitions, 3805 flow [2024-06-14 11:34:11,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3805, PETRI_PLACES=222, PETRI_TRANSITIONS=299} [2024-06-14 11:34:11,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 11:34:11,439 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 299 transitions, 3805 flow [2024-06-14 11:34:11,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:11,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:11,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:11,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:34:11,439 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:11,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash -346545189, now seen corresponding path program 1 times [2024-06-14 11:34:11,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:11,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986776185] [2024-06-14 11:34:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:11,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:11,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986776185] [2024-06-14 11:34:11,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986776185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:11,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:11,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942859532] [2024-06-14 11:34:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:11,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:11,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:11,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:11,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:11,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 299 transitions, 3805 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:11,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:11,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:11,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:12,260 INFO L124 PetriNetUnfolderBase]: 3470/6041 cut-off events. [2024-06-14 11:34:12,260 INFO L125 PetriNetUnfolderBase]: For 358818/358818 co-relation queries the response was YES. [2024-06-14 11:34:12,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37314 conditions, 6041 events. 3470/6041 cut-off events. For 358818/358818 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 41854 event pairs, 1073 based on Foata normal form. 4/6041 useless extension candidates. Maximal degree in co-relation 37210. Up to 5393 conditions per place. [2024-06-14 11:34:12,321 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 268 selfloop transitions, 40 changer transitions 0/316 dead transitions. [2024-06-14 11:34:12,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 316 transitions, 4511 flow [2024-06-14 11:34:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:34:12,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 11:34:12,322 INFO L175 Difference]: Start difference. First operand has 222 places, 299 transitions, 3805 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:34:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 316 transitions, 4511 flow [2024-06-14 11:34:12,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 316 transitions, 4229 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 11:34:12,908 INFO L231 Difference]: Finished difference. Result has 220 places, 302 transitions, 3671 flow [2024-06-14 11:34:12,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3671, PETRI_PLACES=220, PETRI_TRANSITIONS=302} [2024-06-14 11:34:12,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 11:34:12,908 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 302 transitions, 3671 flow [2024-06-14 11:34:12,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:12,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:12,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:12,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:34:12,909 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:12,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1633056195, now seen corresponding path program 2 times [2024-06-14 11:34:12,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:12,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540545] [2024-06-14 11:34:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:12,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:12,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:12,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540545] [2024-06-14 11:34:12,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:12,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:12,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:12,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221242943] [2024-06-14 11:34:12,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:12,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:12,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:13,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:13,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 302 transitions, 3671 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:13,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:13,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:13,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:13,805 INFO L124 PetriNetUnfolderBase]: 3486/6062 cut-off events. [2024-06-14 11:34:13,805 INFO L125 PetriNetUnfolderBase]: For 368743/368743 co-relation queries the response was YES. [2024-06-14 11:34:13,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37455 conditions, 6062 events. 3486/6062 cut-off events. For 368743/368743 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42071 event pairs, 1090 based on Foata normal form. 4/6057 useless extension candidates. Maximal degree in co-relation 37350. Up to 5417 conditions per place. [2024-06-14 11:34:13,857 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 271 selfloop transitions, 37 changer transitions 0/316 dead transitions. [2024-06-14 11:34:13,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 316 transitions, 4375 flow [2024-06-14 11:34:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:34:13,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562015503875969 [2024-06-14 11:34:13,859 INFO L175 Difference]: Start difference. First operand has 220 places, 302 transitions, 3671 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:34:13,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 316 transitions, 4375 flow [2024-06-14 11:34:14,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 316 transitions, 4249 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:14,477 INFO L231 Difference]: Finished difference. Result has 222 places, 305 transitions, 3693 flow [2024-06-14 11:34:14,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3545, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3693, PETRI_PLACES=222, PETRI_TRANSITIONS=305} [2024-06-14 11:34:14,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 11:34:14,478 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 305 transitions, 3693 flow [2024-06-14 11:34:14,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:14,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:14,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:14,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:34:14,478 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:14,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1642579395, now seen corresponding path program 3 times [2024-06-14 11:34:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507932122] [2024-06-14 11:34:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:14,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507932122] [2024-06-14 11:34:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507932122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:14,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257238368] [2024-06-14 11:34:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:14,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:14,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 305 transitions, 3693 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:14,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:14,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:14,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:15,319 INFO L124 PetriNetUnfolderBase]: 3489/6075 cut-off events. [2024-06-14 11:34:15,320 INFO L125 PetriNetUnfolderBase]: For 375295/375295 co-relation queries the response was YES. [2024-06-14 11:34:15,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37539 conditions, 6075 events. 3489/6075 cut-off events. For 375295/375295 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42280 event pairs, 1081 based on Foata normal form. 4/6070 useless extension candidates. Maximal degree in co-relation 37433. Up to 5370 conditions per place. [2024-06-14 11:34:15,381 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 266 selfloop transitions, 46 changer transitions 0/320 dead transitions. [2024-06-14 11:34:15,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 320 transitions, 4413 flow [2024-06-14 11:34:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:34:15,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658914728682171 [2024-06-14 11:34:15,382 INFO L175 Difference]: Start difference. First operand has 222 places, 305 transitions, 3693 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:34:15,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 320 transitions, 4413 flow [2024-06-14 11:34:16,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 320 transitions, 4287 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:16,192 INFO L231 Difference]: Finished difference. Result has 224 places, 308 transitions, 3739 flow [2024-06-14 11:34:16,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3739, PETRI_PLACES=224, PETRI_TRANSITIONS=308} [2024-06-14 11:34:16,193 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-14 11:34:16,193 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 308 transitions, 3739 flow [2024-06-14 11:34:16,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:16,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:16,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:34:16,194 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:16,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1213040302, now seen corresponding path program 1 times [2024-06-14 11:34:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:16,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103764426] [2024-06-14 11:34:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:16,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103764426] [2024-06-14 11:34:16,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103764426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:16,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:16,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:16,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031347828] [2024-06-14 11:34:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:16,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:16,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:16,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 308 transitions, 3739 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:16,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:16,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:16,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:17,114 INFO L124 PetriNetUnfolderBase]: 3494/6080 cut-off events. [2024-06-14 11:34:17,115 INFO L125 PetriNetUnfolderBase]: For 379126/379126 co-relation queries the response was YES. [2024-06-14 11:34:17,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37779 conditions, 6080 events. 3494/6080 cut-off events. For 379126/379126 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42182 event pairs, 1044 based on Foata normal form. 1/6068 useless extension candidates. Maximal degree in co-relation 37672. Up to 5291 conditions per place. [2024-06-14 11:34:17,172 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 244 selfloop transitions, 85 changer transitions 0/337 dead transitions. [2024-06-14 11:34:17,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 337 transitions, 4905 flow [2024-06-14 11:34:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:34:17,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112956810631229 [2024-06-14 11:34:17,173 INFO L175 Difference]: Start difference. First operand has 224 places, 308 transitions, 3739 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:34:17,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 337 transitions, 4905 flow [2024-06-14 11:34:17,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 337 transitions, 4755 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:17,798 INFO L231 Difference]: Finished difference. Result has 227 places, 311 transitions, 3807 flow [2024-06-14 11:34:17,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3807, PETRI_PLACES=227, PETRI_TRANSITIONS=311} [2024-06-14 11:34:17,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 11:34:17,799 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 311 transitions, 3807 flow [2024-06-14 11:34:17,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:17,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:17,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:17,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:34:17,800 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:17,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash 170419404, now seen corresponding path program 2 times [2024-06-14 11:34:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:17,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977767814] [2024-06-14 11:34:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977767814] [2024-06-14 11:34:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977767814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:17,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:17,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786689166] [2024-06-14 11:34:17,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:17,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:17,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:17,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:17,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 311 transitions, 3807 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:17,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:17,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:17,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:18,726 INFO L124 PetriNetUnfolderBase]: 3499/6083 cut-off events. [2024-06-14 11:34:18,727 INFO L125 PetriNetUnfolderBase]: For 389014/389014 co-relation queries the response was YES. [2024-06-14 11:34:18,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37949 conditions, 6083 events. 3499/6083 cut-off events. For 389014/389014 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42200 event pairs, 1078 based on Foata normal form. 1/6071 useless extension candidates. Maximal degree in co-relation 37841. Up to 5295 conditions per place. [2024-06-14 11:34:18,787 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 238 selfloop transitions, 88 changer transitions 0/334 dead transitions. [2024-06-14 11:34:18,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 334 transitions, 4957 flow [2024-06-14 11:34:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:34:18,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 11:34:18,789 INFO L175 Difference]: Start difference. First operand has 227 places, 311 transitions, 3807 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:34:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 334 transitions, 4957 flow [2024-06-14 11:34:19,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 334 transitions, 4811 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:19,501 INFO L231 Difference]: Finished difference. Result has 230 places, 314 transitions, 3885 flow [2024-06-14 11:34:19,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3667, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3885, PETRI_PLACES=230, PETRI_TRANSITIONS=314} [2024-06-14 11:34:19,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-14 11:34:19,502 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 314 transitions, 3885 flow [2024-06-14 11:34:19,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:19,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:19,502 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] [2024-06-14 11:34:19,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:34:19,503 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:19,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:19,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2063640876, now seen corresponding path program 1 times [2024-06-14 11:34:19,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:19,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400577954] [2024-06-14 11:34:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:19,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:19,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:19,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400577954] [2024-06-14 11:34:19,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400577954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:19,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:19,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766836287] [2024-06-14 11:34:19,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:19,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:19,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:19,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:19,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 314 transitions, 3885 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:19,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:19,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:19,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:20,471 INFO L124 PetriNetUnfolderBase]: 3515/6110 cut-off events. [2024-06-14 11:34:20,471 INFO L125 PetriNetUnfolderBase]: For 406763/406763 co-relation queries the response was YES. [2024-06-14 11:34:20,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38238 conditions, 6110 events. 3515/6110 cut-off events. For 406763/406763 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42292 event pairs, 948 based on Foata normal form. 4/6112 useless extension candidates. Maximal degree in co-relation 38129. Up to 5411 conditions per place. [2024-06-14 11:34:20,530 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 314 selfloop transitions, 28 changer transitions 0/350 dead transitions. [2024-06-14 11:34:20,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 350 transitions, 4820 flow [2024-06-14 11:34:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:34:20,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-14 11:34:20,531 INFO L175 Difference]: Start difference. First operand has 230 places, 314 transitions, 3885 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:34:20,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 350 transitions, 4820 flow [2024-06-14 11:34:21,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 350 transitions, 4678 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:21,340 INFO L231 Difference]: Finished difference. Result has 234 places, 317 transitions, 3840 flow [2024-06-14 11:34:21,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3743, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3840, PETRI_PLACES=234, PETRI_TRANSITIONS=317} [2024-06-14 11:34:21,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-14 11:34:21,341 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 317 transitions, 3840 flow [2024-06-14 11:34:21,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:21,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:21,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:21,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:34:21,342 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:21,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:21,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2073164076, now seen corresponding path program 2 times [2024-06-14 11:34:21,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:21,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765813091] [2024-06-14 11:34:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:21,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:21,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:21,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765813091] [2024-06-14 11:34:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765813091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:21,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:21,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451335899] [2024-06-14 11:34:21,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:21,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:21,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 317 transitions, 3840 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:21,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:21,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:21,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:22,273 INFO L124 PetriNetUnfolderBase]: 3495/6083 cut-off events. [2024-06-14 11:34:22,273 INFO L125 PetriNetUnfolderBase]: For 407372/407372 co-relation queries the response was YES. [2024-06-14 11:34:22,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37827 conditions, 6083 events. 3495/6083 cut-off events. For 407372/407372 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42173 event pairs, 1045 based on Foata normal form. 4/6085 useless extension candidates. Maximal degree in co-relation 37717. Up to 5497 conditions per place. [2024-06-14 11:34:22,333 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 316 selfloop transitions, 21 changer transitions 0/345 dead transitions. [2024-06-14 11:34:22,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 345 transitions, 4584 flow [2024-06-14 11:34:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 11:34:22,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.561046511627907 [2024-06-14 11:34:22,334 INFO L175 Difference]: Start difference. First operand has 234 places, 317 transitions, 3840 flow. Second operand 8 states and 193 transitions. [2024-06-14 11:34:22,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 345 transitions, 4584 flow [2024-06-14 11:34:23,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 345 transitions, 4529 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:23,232 INFO L231 Difference]: Finished difference. Result has 237 places, 317 transitions, 3833 flow [2024-06-14 11:34:23,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3785, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3833, PETRI_PLACES=237, PETRI_TRANSITIONS=317} [2024-06-14 11:34:23,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 11:34:23,240 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 317 transitions, 3833 flow [2024-06-14 11:34:23,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:23,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:23,240 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] [2024-06-14 11:34:23,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:34:23,240 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:23,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1825358058, now seen corresponding path program 3 times [2024-06-14 11:34:23,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:23,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234084360] [2024-06-14 11:34:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:23,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:23,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234084360] [2024-06-14 11:34:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234084360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:23,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:23,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:23,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500859860] [2024-06-14 11:34:23,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:23,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:23,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:23,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:23,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:23,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 317 transitions, 3833 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:23,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:23,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:23,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:24,169 INFO L124 PetriNetUnfolderBase]: 3511/6095 cut-off events. [2024-06-14 11:34:24,169 INFO L125 PetriNetUnfolderBase]: For 421425/421425 co-relation queries the response was YES. [2024-06-14 11:34:24,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38238 conditions, 6095 events. 3511/6095 cut-off events. For 421425/421425 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42159 event pairs, 1068 based on Foata normal form. 4/6086 useless extension candidates. Maximal degree in co-relation 38127. Up to 5299 conditions per place. [2024-06-14 11:34:24,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 242 selfloop transitions, 91 changer transitions 0/341 dead transitions. [2024-06-14 11:34:24,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 341 transitions, 5071 flow [2024-06-14 11:34:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:34:24,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-14 11:34:24,231 INFO L175 Difference]: Start difference. First operand has 237 places, 317 transitions, 3833 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:34:24,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 341 transitions, 5071 flow [2024-06-14 11:34:25,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 341 transitions, 4999 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:34:25,206 INFO L231 Difference]: Finished difference. Result has 236 places, 320 transitions, 4051 flow [2024-06-14 11:34:25,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3761, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4051, PETRI_PLACES=236, PETRI_TRANSITIONS=320} [2024-06-14 11:34:25,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 11:34:25,207 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 320 transitions, 4051 flow [2024-06-14 11:34:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:25,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:25,207 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] [2024-06-14 11:34:25,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:34:25,207 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:25,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:25,207 INFO L85 PathProgramCache]: Analyzing trace with hash 358329814, now seen corresponding path program 1 times [2024-06-14 11:34:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:25,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830427903] [2024-06-14 11:34:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:25,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:25,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830427903] [2024-06-14 11:34:25,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830427903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:25,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:25,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:25,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352601532] [2024-06-14 11:34:25,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:25,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:25,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:25,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:25,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:25,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:25,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 320 transitions, 4051 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:25,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:25,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:25,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:26,127 INFO L124 PetriNetUnfolderBase]: 3516/6103 cut-off events. [2024-06-14 11:34:26,127 INFO L125 PetriNetUnfolderBase]: For 426453/426453 co-relation queries the response was YES. [2024-06-14 11:34:26,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38750 conditions, 6103 events. 3516/6103 cut-off events. For 426453/426453 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42251 event pairs, 1077 based on Foata normal form. 1/6092 useless extension candidates. Maximal degree in co-relation 38638. Up to 5336 conditions per place. [2024-06-14 11:34:26,188 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 261 selfloop transitions, 78 changer transitions 0/347 dead transitions. [2024-06-14 11:34:26,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 347 transitions, 4963 flow [2024-06-14 11:34:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:34:26,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-14 11:34:26,189 INFO L175 Difference]: Start difference. First operand has 236 places, 320 transitions, 4051 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:34:26,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 347 transitions, 4963 flow [2024-06-14 11:34:27,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 347 transitions, 4695 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:27,421 INFO L231 Difference]: Finished difference. Result has 238 places, 323 transitions, 3975 flow [2024-06-14 11:34:27,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3975, PETRI_PLACES=238, PETRI_TRANSITIONS=323} [2024-06-14 11:34:27,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 11:34:27,422 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 323 transitions, 3975 flow [2024-06-14 11:34:27,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:27,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:27,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:27,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:34:27,423 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:27,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:27,423 INFO L85 PathProgramCache]: Analyzing trace with hash -52713202, now seen corresponding path program 2 times [2024-06-14 11:34:27,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:27,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086089591] [2024-06-14 11:34:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:27,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:27,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:27,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086089591] [2024-06-14 11:34:27,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086089591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:27,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:27,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:27,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551665958] [2024-06-14 11:34:27,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:27,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:27,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:27,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:27,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 323 transitions, 3975 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:27,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:27,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:27,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:28,279 INFO L124 PetriNetUnfolderBase]: 3529/6124 cut-off events. [2024-06-14 11:34:28,280 INFO L125 PetriNetUnfolderBase]: For 437591/437591 co-relation queries the response was YES. [2024-06-14 11:34:28,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38790 conditions, 6124 events. 3529/6124 cut-off events. For 437591/437591 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42481 event pairs, 1077 based on Foata normal form. 1/6113 useless extension candidates. Maximal degree in co-relation 38677. Up to 5346 conditions per place. [2024-06-14 11:34:28,340 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 253 selfloop transitions, 86 changer transitions 0/347 dead transitions. [2024-06-14 11:34:28,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 347 transitions, 5061 flow [2024-06-14 11:34:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 11:34:28,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 11:34:28,341 INFO L175 Difference]: Start difference. First operand has 238 places, 323 transitions, 3975 flow. Second operand 6 states and 156 transitions. [2024-06-14 11:34:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 347 transitions, 5061 flow [2024-06-14 11:34:29,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 347 transitions, 4893 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:29,414 INFO L231 Difference]: Finished difference. Result has 239 places, 329 transitions, 4057 flow [2024-06-14 11:34:29,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3819, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4057, PETRI_PLACES=239, PETRI_TRANSITIONS=329} [2024-06-14 11:34:29,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 11:34:29,415 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 329 transitions, 4057 flow [2024-06-14 11:34:29,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:29,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:29,415 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] [2024-06-14 11:34:29,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:34:29,415 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:29,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1707873726, now seen corresponding path program 3 times [2024-06-14 11:34:29,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:29,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031230672] [2024-06-14 11:34:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:29,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:29,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031230672] [2024-06-14 11:34:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031230672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:29,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:29,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029465810] [2024-06-14 11:34:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:29,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:29,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 329 transitions, 4057 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:29,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:29,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:29,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:30,423 INFO L124 PetriNetUnfolderBase]: 3526/6123 cut-off events. [2024-06-14 11:34:30,424 INFO L125 PetriNetUnfolderBase]: For 446010/446010 co-relation queries the response was YES. [2024-06-14 11:34:30,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38841 conditions, 6123 events. 3526/6123 cut-off events. For 446010/446010 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42506 event pairs, 1059 based on Foata normal form. 1/6118 useless extension candidates. Maximal degree in co-relation 38727. Up to 5334 conditions per place. [2024-06-14 11:34:30,485 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 260 selfloop transitions, 83 changer transitions 0/351 dead transitions. [2024-06-14 11:34:30,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 351 transitions, 5093 flow [2024-06-14 11:34:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:34:30,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 11:34:30,487 INFO L175 Difference]: Start difference. First operand has 239 places, 329 transitions, 4057 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:34:30,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 351 transitions, 5093 flow [2024-06-14 11:34:31,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 351 transitions, 4983 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:31,470 INFO L231 Difference]: Finished difference. Result has 244 places, 329 transitions, 4119 flow [2024-06-14 11:34:31,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4119, PETRI_PLACES=244, PETRI_TRANSITIONS=329} [2024-06-14 11:34:31,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 11:34:31,471 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 329 transitions, 4119 flow [2024-06-14 11:34:31,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:31,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:31,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:31,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:34:31,472 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:31,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:31,472 INFO L85 PathProgramCache]: Analyzing trace with hash -905576010, now seen corresponding path program 4 times [2024-06-14 11:34:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:31,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773299585] [2024-06-14 11:34:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:31,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:31,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773299585] [2024-06-14 11:34:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773299585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:31,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:31,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:31,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533464459] [2024-06-14 11:34:31,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:31,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:31,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:31,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 329 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:31,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:31,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:31,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:32,404 INFO L124 PetriNetUnfolderBase]: 3520/6093 cut-off events. [2024-06-14 11:34:32,404 INFO L125 PetriNetUnfolderBase]: For 455997/455997 co-relation queries the response was YES. [2024-06-14 11:34:32,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38814 conditions, 6093 events. 3520/6093 cut-off events. For 455997/455997 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42251 event pairs, 1098 based on Foata normal form. 2/6081 useless extension candidates. Maximal degree in co-relation 38699. Up to 5329 conditions per place. [2024-06-14 11:34:32,465 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 252 selfloop transitions, 82 changer transitions 0/342 dead transitions. [2024-06-14 11:34:32,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 342 transitions, 5117 flow [2024-06-14 11:34:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:34:32,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:34:32,467 INFO L175 Difference]: Start difference. First operand has 244 places, 329 transitions, 4119 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:34:32,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 342 transitions, 5117 flow [2024-06-14 11:34:33,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 342 transitions, 4882 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:34:33,399 INFO L231 Difference]: Finished difference. Result has 244 places, 329 transitions, 4055 flow [2024-06-14 11:34:33,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4055, PETRI_PLACES=244, PETRI_TRANSITIONS=329} [2024-06-14 11:34:33,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 11:34:33,399 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 329 transitions, 4055 flow [2024-06-14 11:34:33,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:33,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:33,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:33,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:34:33,400 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:33,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash -675559124, now seen corresponding path program 4 times [2024-06-14 11:34:33,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:33,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471076745] [2024-06-14 11:34:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:33,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:33,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471076745] [2024-06-14 11:34:33,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471076745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:33,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:33,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:33,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101785313] [2024-06-14 11:34:33,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:33,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:33,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:33,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:33,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:33,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:33,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 329 transitions, 4055 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:33,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:33,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:33,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:34,439 INFO L124 PetriNetUnfolderBase]: 3579/6188 cut-off events. [2024-06-14 11:34:34,439 INFO L125 PetriNetUnfolderBase]: For 516629/516629 co-relation queries the response was YES. [2024-06-14 11:34:34,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39452 conditions, 6188 events. 3579/6188 cut-off events. For 516629/516629 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 42965 event pairs, 1109 based on Foata normal form. 20/6194 useless extension candidates. Maximal degree in co-relation 39336. Up to 5346 conditions per place. [2024-06-14 11:34:34,501 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 257 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-14 11:34:34,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 349 transitions, 5195 flow [2024-06-14 11:34:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:34:34,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:34:34,503 INFO L175 Difference]: Start difference. First operand has 244 places, 329 transitions, 4055 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:34:34,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 349 transitions, 5195 flow [2024-06-14 11:34:35,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 349 transitions, 5003 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:35,741 INFO L231 Difference]: Finished difference. Result has 245 places, 332 transitions, 4146 flow [2024-06-14 11:34:35,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3863, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4146, PETRI_PLACES=245, PETRI_TRANSITIONS=332} [2024-06-14 11:34:35,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 11:34:35,741 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 332 transitions, 4146 flow [2024-06-14 11:34:35,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:35,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:35,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:35,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:34:35,742 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:35,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash 959862780, now seen corresponding path program 3 times [2024-06-14 11:34:35,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:35,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040942356] [2024-06-14 11:34:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:35,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:35,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040942356] [2024-06-14 11:34:35,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040942356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:35,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:35,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980014596] [2024-06-14 11:34:35,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:35,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:35,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:35,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 332 transitions, 4146 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:35,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:35,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:35,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:36,730 INFO L124 PetriNetUnfolderBase]: 3584/6220 cut-off events. [2024-06-14 11:34:36,730 INFO L125 PetriNetUnfolderBase]: For 473139/473139 co-relation queries the response was YES. [2024-06-14 11:34:36,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39811 conditions, 6220 events. 3584/6220 cut-off events. For 473139/473139 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43319 event pairs, 1083 based on Foata normal form. 1/6217 useless extension candidates. Maximal degree in co-relation 39693. Up to 5431 conditions per place. [2024-06-14 11:34:36,801 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 270 selfloop transitions, 78 changer transitions 0/356 dead transitions. [2024-06-14 11:34:36,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 356 transitions, 5081 flow [2024-06-14 11:34:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:34:36,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 11:34:36,802 INFO L175 Difference]: Start difference. First operand has 245 places, 332 transitions, 4146 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:34:36,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 356 transitions, 5081 flow [2024-06-14 11:34:37,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 356 transitions, 4836 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:37,848 INFO L231 Difference]: Finished difference. Result has 247 places, 335 transitions, 4098 flow [2024-06-14 11:34:37,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4098, PETRI_PLACES=247, PETRI_TRANSITIONS=335} [2024-06-14 11:34:37,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-14 11:34:37,848 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 335 transitions, 4098 flow [2024-06-14 11:34:37,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:37,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:37,849 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] [2024-06-14 11:34:37,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:34:37,849 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:37,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash 108046068, now seen corresponding path program 4 times [2024-06-14 11:34:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:37,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029611373] [2024-06-14 11:34:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:37,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:37,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:37,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029611373] [2024-06-14 11:34:37,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029611373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:37,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:37,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:37,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367364867] [2024-06-14 11:34:37,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:37,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:37,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:38,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:38,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 335 transitions, 4098 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:38,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:38,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:38,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:39,049 INFO L124 PetriNetUnfolderBase]: 3581/6216 cut-off events. [2024-06-14 11:34:39,049 INFO L125 PetriNetUnfolderBase]: For 476264/476264 co-relation queries the response was YES. [2024-06-14 11:34:39,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39279 conditions, 6216 events. 3581/6216 cut-off events. For 476264/476264 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43283 event pairs, 1076 based on Foata normal form. 1/6213 useless extension candidates. Maximal degree in co-relation 39160. Up to 5429 conditions per place. [2024-06-14 11:34:39,104 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 80 changer transitions 0/359 dead transitions. [2024-06-14 11:34:39,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 359 transitions, 5170 flow [2024-06-14 11:34:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:34:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:34:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 11:34:39,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684754521963824 [2024-06-14 11:34:39,105 INFO L175 Difference]: Start difference. First operand has 247 places, 335 transitions, 4098 flow. Second operand 9 states and 220 transitions. [2024-06-14 11:34:39,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 359 transitions, 5170 flow [2024-06-14 11:34:39,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 359 transitions, 5061 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:39,998 INFO L231 Difference]: Finished difference. Result has 252 places, 335 transitions, 4155 flow [2024-06-14 11:34:39,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4155, PETRI_PLACES=252, PETRI_TRANSITIONS=335} [2024-06-14 11:34:39,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 11:34:39,998 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 335 transitions, 4155 flow [2024-06-14 11:34:39,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:39,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:39,999 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] [2024-06-14 11:34:39,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:34:39,999 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:39,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash -556353556, now seen corresponding path program 5 times [2024-06-14 11:34:39,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266300954] [2024-06-14 11:34:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:40,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:40,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:40,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266300954] [2024-06-14 11:34:40,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266300954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:40,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:40,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:40,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278768968] [2024-06-14 11:34:40,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:40,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:40,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:40,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:40,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:40,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 335 transitions, 4155 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:40,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:40,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:40,937 INFO L124 PetriNetUnfolderBase]: 3573/6203 cut-off events. [2024-06-14 11:34:40,937 INFO L125 PetriNetUnfolderBase]: For 485234/485234 co-relation queries the response was YES. [2024-06-14 11:34:40,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39230 conditions, 6203 events. 3573/6203 cut-off events. For 485234/485234 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43166 event pairs, 1076 based on Foata normal form. 2/6201 useless extension candidates. Maximal degree in co-relation 39109. Up to 5421 conditions per place. [2024-06-14 11:34:41,012 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 268 selfloop transitions, 77 changer transitions 0/353 dead transitions. [2024-06-14 11:34:41,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 353 transitions, 5047 flow [2024-06-14 11:34:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:34:41,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 11:34:41,013 INFO L175 Difference]: Start difference. First operand has 252 places, 335 transitions, 4155 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:34:41,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 353 transitions, 5047 flow [2024-06-14 11:34:42,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 353 transitions, 4813 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 11:34:42,013 INFO L231 Difference]: Finished difference. Result has 250 places, 335 transitions, 4083 flow [2024-06-14 11:34:42,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3921, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4083, PETRI_PLACES=250, PETRI_TRANSITIONS=335} [2024-06-14 11:34:42,013 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 11:34:42,013 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 335 transitions, 4083 flow [2024-06-14 11:34:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:42,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:42,014 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] [2024-06-14 11:34:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:34:42,014 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:42,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash -242068618, now seen corresponding path program 6 times [2024-06-14 11:34:42,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:42,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328116002] [2024-06-14 11:34:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:42,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:42,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328116002] [2024-06-14 11:34:42,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328116002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:42,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:42,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:42,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430828931] [2024-06-14 11:34:42,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:42,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:42,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:42,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:42,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 335 transitions, 4083 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:42,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:42,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:42,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:43,038 INFO L124 PetriNetUnfolderBase]: 3583/6201 cut-off events. [2024-06-14 11:34:43,039 INFO L125 PetriNetUnfolderBase]: For 496777/496777 co-relation queries the response was YES. [2024-06-14 11:34:43,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39413 conditions, 6201 events. 3583/6201 cut-off events. For 496777/496777 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43145 event pairs, 1107 based on Foata normal form. 2/6185 useless extension candidates. Maximal degree in co-relation 39292. Up to 5431 conditions per place. [2024-06-14 11:34:43,095 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 258 selfloop transitions, 84 changer transitions 0/350 dead transitions. [2024-06-14 11:34:43,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 350 transitions, 5006 flow [2024-06-14 11:34:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 11:34:43,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852713178294574 [2024-06-14 11:34:43,096 INFO L175 Difference]: Start difference. First operand has 250 places, 335 transitions, 4083 flow. Second operand 6 states and 151 transitions. [2024-06-14 11:34:43,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 350 transitions, 5006 flow [2024-06-14 11:34:44,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 350 transitions, 4846 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:44,158 INFO L231 Difference]: Finished difference. Result has 250 places, 339 transitions, 4151 flow [2024-06-14 11:34:44,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3929, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4151, PETRI_PLACES=250, PETRI_TRANSITIONS=339} [2024-06-14 11:34:44,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 11:34:44,164 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 339 transitions, 4151 flow [2024-06-14 11:34:44,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:44,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:44,165 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] [2024-06-14 11:34:44,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:34:44,165 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:44,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1224758868, now seen corresponding path program 7 times [2024-06-14 11:34:44,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:44,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140104023] [2024-06-14 11:34:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:44,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140104023] [2024-06-14 11:34:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140104023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:44,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:44,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:44,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175430466] [2024-06-14 11:34:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:44,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:44,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:44,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:44,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:44,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 339 transitions, 4151 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:44,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:44,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:44,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:45,069 INFO L124 PetriNetUnfolderBase]: 3575/6185 cut-off events. [2024-06-14 11:34:45,070 INFO L125 PetriNetUnfolderBase]: For 501583/501583 co-relation queries the response was YES. [2024-06-14 11:34:45,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39316 conditions, 6185 events. 3575/6185 cut-off events. For 501583/501583 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 42972 event pairs, 1105 based on Foata normal form. 2/6169 useless extension candidates. Maximal degree in co-relation 39194. Up to 5423 conditions per place. [2024-06-14 11:34:45,139 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 261 selfloop transitions, 80 changer transitions 0/349 dead transitions. [2024-06-14 11:34:45,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 349 transitions, 4857 flow [2024-06-14 11:34:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:34:45,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 11:34:45,142 INFO L175 Difference]: Start difference. First operand has 250 places, 339 transitions, 4151 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:34:45,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 349 transitions, 4857 flow [2024-06-14 11:34:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 349 transitions, 4562 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:46,115 INFO L231 Difference]: Finished difference. Result has 250 places, 339 transitions, 4025 flow [2024-06-14 11:34:46,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4025, PETRI_PLACES=250, PETRI_TRANSITIONS=339} [2024-06-14 11:34:46,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 11:34:46,115 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 339 transitions, 4025 flow [2024-06-14 11:34:46,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:46,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:46,116 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] [2024-06-14 11:34:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:34:46,116 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:46,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:46,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2010288628, now seen corresponding path program 1 times [2024-06-14 11:34:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:46,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420740159] [2024-06-14 11:34:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:46,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:46,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:46,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420740159] [2024-06-14 11:34:46,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420740159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:46,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:46,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244888879] [2024-06-14 11:34:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:46,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:46,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 339 transitions, 4025 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:46,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:46,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:47,152 INFO L124 PetriNetUnfolderBase]: 3596/6245 cut-off events. [2024-06-14 11:34:47,152 INFO L125 PetriNetUnfolderBase]: For 520877/520877 co-relation queries the response was YES. [2024-06-14 11:34:47,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39976 conditions, 6245 events. 3596/6245 cut-off events. For 520877/520877 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43445 event pairs, 967 based on Foata normal form. 2/6245 useless extension candidates. Maximal degree in co-relation 39853. Up to 5636 conditions per place. [2024-06-14 11:34:47,209 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 332 selfloop transitions, 27 changer transitions 0/367 dead transitions. [2024-06-14 11:34:47,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 367 transitions, 5117 flow [2024-06-14 11:34:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:34:47,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552325581395349 [2024-06-14 11:34:47,210 INFO L175 Difference]: Start difference. First operand has 250 places, 339 transitions, 4025 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:34:47,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 367 transitions, 5117 flow [2024-06-14 11:34:47,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 367 transitions, 4923 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:47,946 INFO L231 Difference]: Finished difference. Result has 252 places, 343 transitions, 4046 flow [2024-06-14 11:34:47,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3831, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4046, PETRI_PLACES=252, PETRI_TRANSITIONS=343} [2024-06-14 11:34:47,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 11:34:47,947 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 343 transitions, 4046 flow [2024-06-14 11:34:47,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:47,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:47,947 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] [2024-06-14 11:34:47,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:34:47,948 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:47,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -446114770, now seen corresponding path program 2 times [2024-06-14 11:34:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895620626] [2024-06-14 11:34:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:48,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:48,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895620626] [2024-06-14 11:34:48,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895620626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:48,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:48,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:48,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551127873] [2024-06-14 11:34:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:48,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:48,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 343 transitions, 4046 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:48,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:48,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:48,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:49,039 INFO L124 PetriNetUnfolderBase]: 3591/6238 cut-off events. [2024-06-14 11:34:49,039 INFO L125 PetriNetUnfolderBase]: For 526004/526004 co-relation queries the response was YES. [2024-06-14 11:34:49,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39745 conditions, 6238 events. 3591/6238 cut-off events. For 526004/526004 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43454 event pairs, 1050 based on Foata normal form. 2/6238 useless extension candidates. Maximal degree in co-relation 39621. Up to 5664 conditions per place. [2024-06-14 11:34:49,113 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 331 selfloop transitions, 22 changer transitions 0/361 dead transitions. [2024-06-14 11:34:49,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 361 transitions, 4796 flow [2024-06-14 11:34:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:34:49,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548172757475083 [2024-06-14 11:34:49,114 INFO L175 Difference]: Start difference. First operand has 252 places, 343 transitions, 4046 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:34:49,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 361 transitions, 4796 flow [2024-06-14 11:34:50,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 361 transitions, 4633 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:50,167 INFO L231 Difference]: Finished difference. Result has 255 places, 343 transitions, 3932 flow [2024-06-14 11:34:50,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3883, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3932, PETRI_PLACES=255, PETRI_TRANSITIONS=343} [2024-06-14 11:34:50,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-14 11:34:50,168 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 343 transitions, 3932 flow [2024-06-14 11:34:50,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 11:34:50,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:50,169 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] [2024-06-14 11:34:50,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:34:50,169 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:50,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash -648668528, now seen corresponding path program 3 times [2024-06-14 11:34:50,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:50,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438081694] [2024-06-14 11:34:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:50,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:50,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:50,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438081694] [2024-06-14 11:34:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438081694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:50,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:50,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:50,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314358055] [2024-06-14 11:34:50,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:50,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:50,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 343 transitions, 3932 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:50,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:50,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:50,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:51,306 INFO L124 PetriNetUnfolderBase]: 3586/6224 cut-off events. [2024-06-14 11:34:51,307 INFO L125 PetriNetUnfolderBase]: For 530966/530966 co-relation queries the response was YES. [2024-06-14 11:34:51,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39417 conditions, 6224 events. 3586/6224 cut-off events. For 530966/530966 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43349 event pairs, 1056 based on Foata normal form. 2/6219 useless extension candidates. Maximal degree in co-relation 39291. Up to 5657 conditions per place. [2024-06-14 11:34:51,371 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 326 selfloop transitions, 22 changer transitions 0/356 dead transitions. [2024-06-14 11:34:51,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 356 transitions, 4734 flow [2024-06-14 11:34:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:34:51,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-06-14 11:34:51,374 INFO L175 Difference]: Start difference. First operand has 255 places, 343 transitions, 3932 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:34:51,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 356 transitions, 4734 flow [2024-06-14 11:34:52,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 356 transitions, 4680 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:52,693 INFO L231 Difference]: Finished difference. Result has 255 places, 345 transitions, 4011 flow [2024-06-14 11:34:52,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4011, PETRI_PLACES=255, PETRI_TRANSITIONS=345} [2024-06-14 11:34:52,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-14 11:34:52,694 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 345 transitions, 4011 flow [2024-06-14 11:34:52,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:52,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:52,694 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] [2024-06-14 11:34:52,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:34:52,695 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:52,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:52,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1895529538, now seen corresponding path program 1 times [2024-06-14 11:34:52,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:52,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517389433] [2024-06-14 11:34:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:52,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517389433] [2024-06-14 11:34:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517389433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:52,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:52,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854327003] [2024-06-14 11:34:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:52,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:52,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:52,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:52,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 345 transitions, 4011 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) [2024-06-14 11:34:52,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:52,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:52,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:53,744 INFO L124 PetriNetUnfolderBase]: 3591/6229 cut-off events. [2024-06-14 11:34:53,744 INFO L125 PetriNetUnfolderBase]: For 538994/538994 co-relation queries the response was YES. [2024-06-14 11:34:53,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39653 conditions, 6229 events. 3591/6229 cut-off events. For 538994/538994 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43355 event pairs, 1060 based on Foata normal form. 1/6224 useless extension candidates. Maximal degree in co-relation 39526. Up to 5543 conditions per place. [2024-06-14 11:34:53,813 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 298 selfloop transitions, 56 changer transitions 0/362 dead transitions. [2024-06-14 11:34:53,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 362 transitions, 4972 flow [2024-06-14 11:34:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:34:53,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 11:34:53,814 INFO L175 Difference]: Start difference. First operand has 255 places, 345 transitions, 4011 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:34:53,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 362 transitions, 4972 flow [2024-06-14 11:34:55,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 362 transitions, 4855 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:55,175 INFO L231 Difference]: Finished difference. Result has 257 places, 348 transitions, 4066 flow [2024-06-14 11:34:55,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4066, PETRI_PLACES=257, PETRI_TRANSITIONS=348} [2024-06-14 11:34:55,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 11:34:55,176 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 348 transitions, 4066 flow [2024-06-14 11:34:55,176 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) [2024-06-14 11:34:55,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:55,176 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] [2024-06-14 11:34:55,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:34:55,176 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:55,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1071711994, now seen corresponding path program 2 times [2024-06-14 11:34:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:55,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700529760] [2024-06-14 11:34:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:55,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:55,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700529760] [2024-06-14 11:34:55,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700529760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:55,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:55,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:55,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828591683] [2024-06-14 11:34:55,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:55,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:55,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:55,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:55,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:55,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:55,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 348 transitions, 4066 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) [2024-06-14 11:34:55,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:55,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:55,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:56,185 INFO L124 PetriNetUnfolderBase]: 3588/6225 cut-off events. [2024-06-14 11:34:56,185 INFO L125 PetriNetUnfolderBase]: For 546299/546299 co-relation queries the response was YES. [2024-06-14 11:34:56,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39692 conditions, 6225 events. 3588/6225 cut-off events. For 546299/546299 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43388 event pairs, 1060 based on Foata normal form. 1/6220 useless extension candidates. Maximal degree in co-relation 39564. Up to 5540 conditions per place. [2024-06-14 11:34:56,259 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 295 selfloop transitions, 58 changer transitions 0/361 dead transitions. [2024-06-14 11:34:56,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 361 transitions, 4804 flow [2024-06-14 11:34:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:34:56,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 11:34:56,260 INFO L175 Difference]: Start difference. First operand has 257 places, 348 transitions, 4066 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:34:56,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 361 transitions, 4804 flow [2024-06-14 11:34:58,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 361 transitions, 4702 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:58,151 INFO L231 Difference]: Finished difference. Result has 259 places, 348 transitions, 4093 flow [2024-06-14 11:34:58,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4093, PETRI_PLACES=259, PETRI_TRANSITIONS=348} [2024-06-14 11:34:58,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 11:34:58,152 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 348 transitions, 4093 flow [2024-06-14 11:34:58,152 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) [2024-06-14 11:34:58,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:58,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:58,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:34:58,153 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:58,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:58,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1612568040, now seen corresponding path program 3 times [2024-06-14 11:34:58,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:58,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206812659] [2024-06-14 11:34:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206812659] [2024-06-14 11:34:58,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206812659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:58,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546916405] [2024-06-14 11:34:58,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:58,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:58,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:58,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:58,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:34:58,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 348 transitions, 4093 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:58,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:58,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:34:58,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:59,140 INFO L124 PetriNetUnfolderBase]: 3593/6238 cut-off events. [2024-06-14 11:34:59,141 INFO L125 PetriNetUnfolderBase]: For 546852/546852 co-relation queries the response was YES. [2024-06-14 11:34:59,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39771 conditions, 6238 events. 3593/6238 cut-off events. For 546852/546852 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43497 event pairs, 1088 based on Foata normal form. 1/6233 useless extension candidates. Maximal degree in co-relation 39643. Up to 5443 conditions per place. [2024-06-14 11:34:59,215 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 274 selfloop transitions, 88 changer transitions 0/370 dead transitions. [2024-06-14 11:34:59,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 370 transitions, 5256 flow [2024-06-14 11:34:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:34:59,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:34:59,216 INFO L175 Difference]: Start difference. First operand has 259 places, 348 transitions, 4093 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:34:59,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 370 transitions, 5256 flow [2024-06-14 11:35:00,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 370 transitions, 5078 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:35:00,548 INFO L231 Difference]: Finished difference. Result has 259 places, 351 transitions, 4151 flow [2024-06-14 11:35:00,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4151, PETRI_PLACES=259, PETRI_TRANSITIONS=351} [2024-06-14 11:35:00,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 11:35:00,549 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 351 transitions, 4151 flow [2024-06-14 11:35:00,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:00,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:00,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:00,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:35:00,549 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:00,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash 520576060, now seen corresponding path program 4 times [2024-06-14 11:35:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:00,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183575130] [2024-06-14 11:35:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:00,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:00,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183575130] [2024-06-14 11:35:00,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183575130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:00,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:00,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:00,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554271562] [2024-06-14 11:35:00,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:00,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:00,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:00,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:00,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:00,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:00,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 351 transitions, 4151 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) [2024-06-14 11:35:00,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:00,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:00,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:01,509 INFO L124 PetriNetUnfolderBase]: 3598/6243 cut-off events. [2024-06-14 11:35:01,509 INFO L125 PetriNetUnfolderBase]: For 547005/547005 co-relation queries the response was YES. [2024-06-14 11:35:01,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39886 conditions, 6243 events. 3598/6243 cut-off events. For 547005/547005 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 43545 event pairs, 1089 based on Foata normal form. 1/6238 useless extension candidates. Maximal degree in co-relation 39758. Up to 5449 conditions per place. [2024-06-14 11:35:01,583 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 273 selfloop transitions, 91 changer transitions 0/372 dead transitions. [2024-06-14 11:35:01,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 372 transitions, 5322 flow [2024-06-14 11:35:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 11:35:01,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 11:35:01,585 INFO L175 Difference]: Start difference. First operand has 259 places, 351 transitions, 4151 flow. Second operand 6 states and 156 transitions. [2024-06-14 11:35:01,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 372 transitions, 5322 flow [2024-06-14 11:35:02,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 372 transitions, 5105 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:02,675 INFO L231 Difference]: Finished difference. Result has 260 places, 354 transitions, 4178 flow [2024-06-14 11:35:02,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4178, PETRI_PLACES=260, PETRI_TRANSITIONS=354} [2024-06-14 11:35:02,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-14 11:35:02,675 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 354 transitions, 4178 flow [2024-06-14 11:35:02,675 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) [2024-06-14 11:35:02,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:02,676 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] [2024-06-14 11:35:02,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:35:02,676 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:02,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1794374142, now seen corresponding path program 5 times [2024-06-14 11:35:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:02,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61014760] [2024-06-14 11:35:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:02,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:02,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:02,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61014760] [2024-06-14 11:35:02,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61014760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:02,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:02,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:02,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470012314] [2024-06-14 11:35:02,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:02,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:02,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:02,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:02,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:02,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 354 transitions, 4178 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) [2024-06-14 11:35:02,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:02,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:02,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:03,639 INFO L124 PetriNetUnfolderBase]: 3611/6254 cut-off events. [2024-06-14 11:35:03,639 INFO L125 PetriNetUnfolderBase]: For 563819/563819 co-relation queries the response was YES. [2024-06-14 11:35:03,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40223 conditions, 6254 events. 3611/6254 cut-off events. For 563819/563819 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 43569 event pairs, 1115 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 40094. Up to 5464 conditions per place. [2024-06-14 11:35:03,712 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 268 selfloop transitions, 96 changer transitions 0/372 dead transitions. [2024-06-14 11:35:03,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 372 transitions, 5382 flow [2024-06-14 11:35:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:35:03,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 11:35:03,713 INFO L175 Difference]: Start difference. First operand has 260 places, 354 transitions, 4178 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:35:03,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 372 transitions, 5382 flow [2024-06-14 11:35:05,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 372 transitions, 5190 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 11:35:05,289 INFO L231 Difference]: Finished difference. Result has 262 places, 360 transitions, 4284 flow [2024-06-14 11:35:05,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3998, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4284, PETRI_PLACES=262, PETRI_TRANSITIONS=360} [2024-06-14 11:35:05,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 11:35:05,289 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 360 transitions, 4284 flow [2024-06-14 11:35:05,289 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) [2024-06-14 11:35:05,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:05,290 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] [2024-06-14 11:35:05,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:35:05,291 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:05,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2096334244, now seen corresponding path program 6 times [2024-06-14 11:35:05,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:05,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110905185] [2024-06-14 11:35:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:05,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:05,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:05,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110905185] [2024-06-14 11:35:05,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110905185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:05,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:05,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:05,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689783240] [2024-06-14 11:35:05,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:05,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:05,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:05,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:05,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:05,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 360 transitions, 4284 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:05,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:05,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:05,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:06,324 INFO L124 PetriNetUnfolderBase]: 3616/6254 cut-off events. [2024-06-14 11:35:06,324 INFO L125 PetriNetUnfolderBase]: For 576161/576161 co-relation queries the response was YES. [2024-06-14 11:35:06,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40412 conditions, 6254 events. 3616/6254 cut-off events. For 576161/576161 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43548 event pairs, 1103 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 40282. Up to 5470 conditions per place. [2024-06-14 11:35:06,404 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 270 selfloop transitions, 101 changer transitions 0/379 dead transitions. [2024-06-14 11:35:06,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 379 transitions, 5648 flow [2024-06-14 11:35:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:35:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:35:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 11:35:06,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-14 11:35:06,406 INFO L175 Difference]: Start difference. First operand has 262 places, 360 transitions, 4284 flow. Second operand 9 states and 210 transitions. [2024-06-14 11:35:06,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 379 transitions, 5648 flow [2024-06-14 11:35:07,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 379 transitions, 5424 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:35:07,855 INFO L231 Difference]: Finished difference. Result has 267 places, 363 transitions, 4326 flow [2024-06-14 11:35:07,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4326, PETRI_PLACES=267, PETRI_TRANSITIONS=363} [2024-06-14 11:35:07,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 11:35:07,856 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 363 transitions, 4326 flow [2024-06-14 11:35:07,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:07,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:07,856 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] [2024-06-14 11:35:07,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:35:07,856 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:07,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:07,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1450285592, now seen corresponding path program 7 times [2024-06-14 11:35:07,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:07,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264917397] [2024-06-14 11:35:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:07,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264917397] [2024-06-14 11:35:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264917397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:07,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529312524] [2024-06-14 11:35:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:07,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:07,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:07,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 363 transitions, 4326 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:07,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:07,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:07,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:09,021 INFO L124 PetriNetUnfolderBase]: 3613/6250 cut-off events. [2024-06-14 11:35:09,022 INFO L125 PetriNetUnfolderBase]: For 584205/584205 co-relation queries the response was YES. [2024-06-14 11:35:09,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40391 conditions, 6250 events. 3613/6250 cut-off events. For 584205/584205 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43579 event pairs, 1103 based on Foata normal form. 1/6237 useless extension candidates. Maximal degree in co-relation 40262. Up to 5467 conditions per place. [2024-06-14 11:35:09,087 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 269 selfloop transitions, 99 changer transitions 0/376 dead transitions. [2024-06-14 11:35:09,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 376 transitions, 5448 flow [2024-06-14 11:35:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:35:09,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5647840531561462 [2024-06-14 11:35:09,088 INFO L175 Difference]: Start difference. First operand has 267 places, 363 transitions, 4326 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:35:09,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 376 transitions, 5448 flow [2024-06-14 11:35:10,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 376 transitions, 5086 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 11:35:10,792 INFO L231 Difference]: Finished difference. Result has 266 places, 363 transitions, 4169 flow [2024-06-14 11:35:10,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4169, PETRI_PLACES=266, PETRI_TRANSITIONS=363} [2024-06-14 11:35:10,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-14 11:35:10,792 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 363 transitions, 4169 flow [2024-06-14 11:35:10,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:10,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:10,793 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] [2024-06-14 11:35:10,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:35:10,793 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:10,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 102137788, now seen corresponding path program 8 times [2024-06-14 11:35:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:10,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460178092] [2024-06-14 11:35:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:10,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460178092] [2024-06-14 11:35:10,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460178092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:10,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:10,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637674800] [2024-06-14 11:35:10,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:10,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:10,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 363 transitions, 4169 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) [2024-06-14 11:35:10,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:10,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:10,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:11,751 INFO L124 PetriNetUnfolderBase]: 3610/6266 cut-off events. [2024-06-14 11:35:11,751 INFO L125 PetriNetUnfolderBase]: For 590292/590292 co-relation queries the response was YES. [2024-06-14 11:35:11,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40242 conditions, 6266 events. 3610/6266 cut-off events. For 590292/590292 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43727 event pairs, 1089 based on Foata normal form. 1/6261 useless extension candidates. Maximal degree in co-relation 40114. Up to 5464 conditions per place. [2024-06-14 11:35:11,825 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 265 selfloop transitions, 104 changer transitions 0/377 dead transitions. [2024-06-14 11:35:11,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 377 transitions, 5121 flow [2024-06-14 11:35:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:35:11,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 11:35:11,826 INFO L175 Difference]: Start difference. First operand has 266 places, 363 transitions, 4169 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:35:11,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 377 transitions, 5121 flow [2024-06-14 11:35:13,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 377 transitions, 4921 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:13,637 INFO L231 Difference]: Finished difference. Result has 266 places, 363 transitions, 4183 flow [2024-06-14 11:35:13,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4183, PETRI_PLACES=266, PETRI_TRANSITIONS=363} [2024-06-14 11:35:13,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-14 11:35:13,638 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 363 transitions, 4183 flow [2024-06-14 11:35:13,638 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) [2024-06-14 11:35:13,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:13,638 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] [2024-06-14 11:35:13,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:35:13,638 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:13,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1794551772, now seen corresponding path program 9 times [2024-06-14 11:35:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:13,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7756931] [2024-06-14 11:35:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:13,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7756931] [2024-06-14 11:35:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7756931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201447908] [2024-06-14 11:35:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:13,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:13,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:13,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:13,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:13,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 363 transitions, 4183 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:13,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:13,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:13,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:14,721 INFO L124 PetriNetUnfolderBase]: 3607/6238 cut-off events. [2024-06-14 11:35:14,721 INFO L125 PetriNetUnfolderBase]: For 599411/599411 co-relation queries the response was YES. [2024-06-14 11:35:14,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40255 conditions, 6238 events. 3607/6238 cut-off events. For 599411/599411 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43407 event pairs, 1108 based on Foata normal form. 1/6225 useless extension candidates. Maximal degree in co-relation 40126. Up to 5461 conditions per place. [2024-06-14 11:35:14,792 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 262 selfloop transitions, 104 changer transitions 0/374 dead transitions. [2024-06-14 11:35:14,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 374 transitions, 4941 flow [2024-06-14 11:35:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:35:14,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614617940199336 [2024-06-14 11:35:14,794 INFO L175 Difference]: Start difference. First operand has 266 places, 363 transitions, 4183 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:35:14,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 374 transitions, 4941 flow [2024-06-14 11:35:16,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 374 transitions, 4605 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:35:16,436 INFO L231 Difference]: Finished difference. Result has 266 places, 363 transitions, 4061 flow [2024-06-14 11:35:16,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=266, PETRI_TRANSITIONS=363} [2024-06-14 11:35:16,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-14 11:35:16,437 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 363 transitions, 4061 flow [2024-06-14 11:35:16,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:16,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:16,437 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] [2024-06-14 11:35:16,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:35:16,438 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash 35424900, now seen corresponding path program 1 times [2024-06-14 11:35:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:16,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113290003] [2024-06-14 11:35:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:16,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:16,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:16,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113290003] [2024-06-14 11:35:16,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113290003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:16,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603927994] [2024-06-14 11:35:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:16,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:16,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:16,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:16,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:16,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 363 transitions, 4061 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:16,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:16,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:16,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:17,556 INFO L124 PetriNetUnfolderBase]: 3739/6473 cut-off events. [2024-06-14 11:35:17,556 INFO L125 PetriNetUnfolderBase]: For 724702/724702 co-relation queries the response was YES. [2024-06-14 11:35:17,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43222 conditions, 6473 events. 3739/6473 cut-off events. For 724702/724702 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 45441 event pairs, 1004 based on Foata normal form. 12/6479 useless extension candidates. Maximal degree in co-relation 43092. Up to 5319 conditions per place. [2024-06-14 11:35:17,638 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 68 changer transitions 0/394 dead transitions. [2024-06-14 11:35:17,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 394 transitions, 5233 flow [2024-06-14 11:35:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:35:17,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-14 11:35:17,641 INFO L175 Difference]: Start difference. First operand has 266 places, 363 transitions, 4061 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:35:17,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 394 transitions, 5233 flow [2024-06-14 11:35:19,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 394 transitions, 4999 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:35:19,376 INFO L231 Difference]: Finished difference. Result has 267 places, 367 transitions, 4121 flow [2024-06-14 11:35:19,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3827, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4121, PETRI_PLACES=267, PETRI_TRANSITIONS=367} [2024-06-14 11:35:19,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 11:35:19,376 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 367 transitions, 4121 flow [2024-06-14 11:35:19,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:19,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:19,377 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] [2024-06-14 11:35:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:35:19,377 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:19,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1071804250, now seen corresponding path program 2 times [2024-06-14 11:35:19,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:19,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332702841] [2024-06-14 11:35:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:19,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:19,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332702841] [2024-06-14 11:35:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332702841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:19,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:19,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:19,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517098318] [2024-06-14 11:35:19,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:19,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:19,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:19,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 367 transitions, 4121 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:19,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:19,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:20,509 INFO L124 PetriNetUnfolderBase]: 3825/6631 cut-off events. [2024-06-14 11:35:20,509 INFO L125 PetriNetUnfolderBase]: For 777897/777897 co-relation queries the response was YES. [2024-06-14 11:35:20,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45512 conditions, 6631 events. 3825/6631 cut-off events. For 777897/777897 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 46855 event pairs, 1113 based on Foata normal form. 12/6637 useless extension candidates. Maximal degree in co-relation 45380. Up to 5693 conditions per place. [2024-06-14 11:35:20,590 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 316 selfloop transitions, 69 changer transitions 0/393 dead transitions. [2024-06-14 11:35:20,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 393 transitions, 5267 flow [2024-06-14 11:35:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:35:20,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-14 11:35:20,592 INFO L175 Difference]: Start difference. First operand has 267 places, 367 transitions, 4121 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:35:20,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 393 transitions, 5267 flow [2024-06-14 11:35:22,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 393 transitions, 5158 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 11:35:22,653 INFO L231 Difference]: Finished difference. Result has 271 places, 371 transitions, 4277 flow [2024-06-14 11:35:22,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=271, PETRI_TRANSITIONS=371} [2024-06-14 11:35:22,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 11:35:22,654 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 371 transitions, 4277 flow [2024-06-14 11:35:22,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:22,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:22,654 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] [2024-06-14 11:35:22,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:35:22,654 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:22,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:22,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1071448060, now seen corresponding path program 3 times [2024-06-14 11:35:22,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:22,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170388195] [2024-06-14 11:35:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:22,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:22,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:22,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170388195] [2024-06-14 11:35:22,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170388195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:22,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:22,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:22,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48163498] [2024-06-14 11:35:22,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:22,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:22,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:22,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:22,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:22,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 371 transitions, 4277 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:22,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:22,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:22,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:23,798 INFO L124 PetriNetUnfolderBase]: 3789/6582 cut-off events. [2024-06-14 11:35:23,798 INFO L125 PetriNetUnfolderBase]: For 742949/742949 co-relation queries the response was YES. [2024-06-14 11:35:23,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43853 conditions, 6582 events. 3789/6582 cut-off events. For 742949/742949 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 46472 event pairs, 1105 based on Foata normal form. 16/6592 useless extension candidates. Maximal degree in co-relation 43719. Up to 5765 conditions per place. [2024-06-14 11:35:23,883 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 317 selfloop transitions, 64 changer transitions 0/389 dead transitions. [2024-06-14 11:35:23,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 389 transitions, 5095 flow [2024-06-14 11:35:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:35:23,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 11:35:23,884 INFO L175 Difference]: Start difference. First operand has 271 places, 371 transitions, 4277 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:35:23,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 389 transitions, 5095 flow [2024-06-14 11:35:26,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 389 transitions, 4952 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 11:35:26,428 INFO L231 Difference]: Finished difference. Result has 275 places, 371 transitions, 4273 flow [2024-06-14 11:35:26,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4273, PETRI_PLACES=275, PETRI_TRANSITIONS=371} [2024-06-14 11:35:26,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 11:35:26,429 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 371 transitions, 4273 flow [2024-06-14 11:35:26,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:26,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:26,429 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] [2024-06-14 11:35:26,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:35:26,429 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:26,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1450021658, now seen corresponding path program 4 times [2024-06-14 11:35:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:26,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346399925] [2024-06-14 11:35:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:26,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:26,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346399925] [2024-06-14 11:35:26,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346399925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:26,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:26,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605245790] [2024-06-14 11:35:26,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:26,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:26,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 371 transitions, 4273 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:26,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:26,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:26,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:27,510 INFO L124 PetriNetUnfolderBase]: 3845/6643 cut-off events. [2024-06-14 11:35:27,510 INFO L125 PetriNetUnfolderBase]: For 757850/757850 co-relation queries the response was YES. [2024-06-14 11:35:27,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44458 conditions, 6643 events. 3845/6643 cut-off events. For 757850/757850 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 46889 event pairs, 1173 based on Foata normal form. 16/6645 useless extension candidates. Maximal degree in co-relation 44322. Up to 5771 conditions per place. [2024-06-14 11:35:27,589 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 101 changer transitions 0/388 dead transitions. [2024-06-14 11:35:27,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 388 transitions, 5141 flow [2024-06-14 11:35:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:35:27,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681063122923588 [2024-06-14 11:35:27,590 INFO L175 Difference]: Start difference. First operand has 275 places, 371 transitions, 4273 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:35:27,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 388 transitions, 5141 flow [2024-06-14 11:35:30,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 388 transitions, 4991 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:30,495 INFO L231 Difference]: Finished difference. Result has 276 places, 373 transitions, 4395 flow [2024-06-14 11:35:30,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4123, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4395, PETRI_PLACES=276, PETRI_TRANSITIONS=373} [2024-06-14 11:35:30,496 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 11:35:30,496 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 373 transitions, 4395 flow [2024-06-14 11:35:30,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:30,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:30,496 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] [2024-06-14 11:35:30,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:35:30,496 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:30,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1050524348, now seen corresponding path program 5 times [2024-06-14 11:35:30,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:30,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352351824] [2024-06-14 11:35:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352351824] [2024-06-14 11:35:30,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352351824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:30,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:30,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138834956] [2024-06-14 11:35:30,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:30,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:30,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:30,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 373 transitions, 4395 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:30,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:30,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:30,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:31,653 INFO L124 PetriNetUnfolderBase]: 3901/6743 cut-off events. [2024-06-14 11:35:31,653 INFO L125 PetriNetUnfolderBase]: For 776919/776919 co-relation queries the response was YES. [2024-06-14 11:35:31,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45385 conditions, 6743 events. 3901/6743 cut-off events. For 776919/776919 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 47788 event pairs, 1185 based on Foata normal form. 16/6745 useless extension candidates. Maximal degree in co-relation 45248. Up to 5859 conditions per place. [2024-06-14 11:35:31,743 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 106 changer transitions 0/390 dead transitions. [2024-06-14 11:35:31,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 390 transitions, 5271 flow [2024-06-14 11:35:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:35:31,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:35:31,744 INFO L175 Difference]: Start difference. First operand has 276 places, 373 transitions, 4395 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:35:31,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 390 transitions, 5271 flow [2024-06-14 11:35:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 390 transitions, 5023 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:34,254 INFO L231 Difference]: Finished difference. Result has 278 places, 375 transitions, 4433 flow [2024-06-14 11:35:34,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4433, PETRI_PLACES=278, PETRI_TRANSITIONS=375} [2024-06-14 11:35:34,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 11:35:34,256 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 375 transitions, 4433 flow [2024-06-14 11:35:34,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:34,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:34,257 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] [2024-06-14 11:35:34,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:35:34,257 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:34,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:34,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1450377848, now seen corresponding path program 6 times [2024-06-14 11:35:34,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:34,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181509719] [2024-06-14 11:35:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:34,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:34,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:34,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181509719] [2024-06-14 11:35:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181509719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:34,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:34,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746498232] [2024-06-14 11:35:34,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:34,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:34,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:34,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:34,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 375 transitions, 4433 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:34,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:34,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:34,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:35,481 INFO L124 PetriNetUnfolderBase]: 3928/6788 cut-off events. [2024-06-14 11:35:35,481 INFO L125 PetriNetUnfolderBase]: For 764214/764214 co-relation queries the response was YES. [2024-06-14 11:35:35,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45435 conditions, 6788 events. 3928/6788 cut-off events. For 764214/764214 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48103 event pairs, 1180 based on Foata normal form. 12/6786 useless extension candidates. Maximal degree in co-relation 45297. Up to 5696 conditions per place. [2024-06-14 11:35:35,556 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 278 selfloop transitions, 109 changer transitions 0/395 dead transitions. [2024-06-14 11:35:35,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 395 transitions, 5337 flow [2024-06-14 11:35:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:35:35,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574750830564784 [2024-06-14 11:35:35,557 INFO L175 Difference]: Start difference. First operand has 278 places, 375 transitions, 4433 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:35:35,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 395 transitions, 5337 flow [2024-06-14 11:35:38,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 395 transitions, 5075 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:38,076 INFO L231 Difference]: Finished difference. Result has 280 places, 377 transitions, 4467 flow [2024-06-14 11:35:38,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4171, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=280, PETRI_TRANSITIONS=377} [2024-06-14 11:35:38,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 11:35:38,077 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 377 transitions, 4467 flow [2024-06-14 11:35:38,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:38,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:38,077 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] [2024-06-14 11:35:38,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:35:38,078 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:38,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1036226652, now seen corresponding path program 1 times [2024-06-14 11:35:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:38,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36528852] [2024-06-14 11:35:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:38,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:38,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:38,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36528852] [2024-06-14 11:35:38,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36528852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:38,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:38,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:38,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444025239] [2024-06-14 11:35:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:38,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:38,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:38,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 377 transitions, 4467 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:38,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:38,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:39,224 INFO L124 PetriNetUnfolderBase]: 4014/6932 cut-off events. [2024-06-14 11:35:39,224 INFO L125 PetriNetUnfolderBase]: For 820557/820557 co-relation queries the response was YES. [2024-06-14 11:35:39,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47295 conditions, 6932 events. 4014/6932 cut-off events. For 820557/820557 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49341 event pairs, 1195 based on Foata normal form. 12/6930 useless extension candidates. Maximal degree in co-relation 47156. Up to 5788 conditions per place. [2024-06-14 11:35:39,312 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 275 selfloop transitions, 116 changer transitions 0/399 dead transitions. [2024-06-14 11:35:39,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 399 transitions, 5617 flow [2024-06-14 11:35:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:35:39,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 11:35:39,313 INFO L175 Difference]: Start difference. First operand has 280 places, 377 transitions, 4467 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:35:39,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 399 transitions, 5617 flow [2024-06-14 11:35:42,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 399 transitions, 5343 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:42,038 INFO L231 Difference]: Finished difference. Result has 282 places, 380 transitions, 4544 flow [2024-06-14 11:35:42,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4544, PETRI_PLACES=282, PETRI_TRANSITIONS=380} [2024-06-14 11:35:42,039 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 11:35:42,039 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 380 transitions, 4544 flow [2024-06-14 11:35:42,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:42,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:42,039 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] [2024-06-14 11:35:42,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:35:42,040 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:42,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1744876772, now seen corresponding path program 2 times [2024-06-14 11:35:42,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:42,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370294940] [2024-06-14 11:35:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:42,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:42,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370294940] [2024-06-14 11:35:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370294940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:42,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:42,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371321660] [2024-06-14 11:35:42,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:42,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:42,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:42,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:42,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:42,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 380 transitions, 4544 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:42,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:42,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:42,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:43,243 INFO L124 PetriNetUnfolderBase]: 4054/6996 cut-off events. [2024-06-14 11:35:43,243 INFO L125 PetriNetUnfolderBase]: For 838675/838675 co-relation queries the response was YES. [2024-06-14 11:35:43,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47799 conditions, 6996 events. 4054/6996 cut-off events. For 838675/838675 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49818 event pairs, 1216 based on Foata normal form. 12/6994 useless extension candidates. Maximal degree in co-relation 47659. Up to 6030 conditions per place. [2024-06-14 11:35:43,323 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 286 selfloop transitions, 106 changer transitions 0/400 dead transitions. [2024-06-14 11:35:43,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 400 transitions, 5464 flow [2024-06-14 11:35:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:35:43,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:35:43,325 INFO L175 Difference]: Start difference. First operand has 282 places, 380 transitions, 4544 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:35:43,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 400 transitions, 5464 flow [2024-06-14 11:35:46,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 400 transitions, 5265 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 11:35:46,534 INFO L231 Difference]: Finished difference. Result has 286 places, 382 transitions, 4642 flow [2024-06-14 11:35:46,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4642, PETRI_PLACES=286, PETRI_TRANSITIONS=382} [2024-06-14 11:35:46,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 11:35:46,534 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 382 transitions, 4642 flow [2024-06-14 11:35:46,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:46,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:46,535 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] [2024-06-14 11:35:46,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:35:46,535 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:46,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash 123059428, now seen corresponding path program 3 times [2024-06-14 11:35:46,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:46,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526133808] [2024-06-14 11:35:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:46,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:46,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:46,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526133808] [2024-06-14 11:35:46,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526133808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:46,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:46,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465240368] [2024-06-14 11:35:46,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:46,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:46,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:46,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:46,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 382 transitions, 4642 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:46,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:46,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:46,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:47,706 INFO L124 PetriNetUnfolderBase]: 4107/7091 cut-off events. [2024-06-14 11:35:47,706 INFO L125 PetriNetUnfolderBase]: For 865562/865562 co-relation queries the response was YES. [2024-06-14 11:35:47,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49113 conditions, 7091 events. 4107/7091 cut-off events. For 865562/865562 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50625 event pairs, 1222 based on Foata normal form. 12/7089 useless extension candidates. Maximal degree in co-relation 48971. Up to 5557 conditions per place. [2024-06-14 11:35:47,799 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 271 selfloop transitions, 126 changer transitions 0/405 dead transitions. [2024-06-14 11:35:47,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 405 transitions, 5842 flow [2024-06-14 11:35:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:35:47,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:35:47,800 INFO L175 Difference]: Start difference. First operand has 286 places, 382 transitions, 4642 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:35:47,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 405 transitions, 5842 flow [2024-06-14 11:35:50,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 405 transitions, 5565 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:50,831 INFO L231 Difference]: Finished difference. Result has 288 places, 384 transitions, 4708 flow [2024-06-14 11:35:50,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4708, PETRI_PLACES=288, PETRI_TRANSITIONS=384} [2024-06-14 11:35:50,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 11:35:50,832 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 384 transitions, 4708 flow [2024-06-14 11:35:50,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:50,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:50,832 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] [2024-06-14 11:35:50,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:35:50,833 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:50,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1794972752, now seen corresponding path program 1 times [2024-06-14 11:35:50,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:50,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269796022] [2024-06-14 11:35:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:50,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:50,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:50,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269796022] [2024-06-14 11:35:50,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269796022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:50,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:50,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:50,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669774095] [2024-06-14 11:35:50,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:50,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:50,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:50,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:50,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:50,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:50,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 384 transitions, 4708 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) [2024-06-14 11:35:50,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:50,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:50,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:52,093 INFO L124 PetriNetUnfolderBase]: 4115/7130 cut-off events. [2024-06-14 11:35:52,093 INFO L125 PetriNetUnfolderBase]: For 829478/829478 co-relation queries the response was YES. [2024-06-14 11:35:52,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49352 conditions, 7130 events. 4115/7130 cut-off events. For 829478/829478 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 50988 event pairs, 1197 based on Foata normal form. 2/7125 useless extension candidates. Maximal degree in co-relation 49209. Up to 6406 conditions per place. [2024-06-14 11:35:52,224 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 358 selfloop transitions, 40 changer transitions 0/406 dead transitions. [2024-06-14 11:35:52,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 406 transitions, 5614 flow [2024-06-14 11:35:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:35:52,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007751937984496 [2024-06-14 11:35:52,225 INFO L175 Difference]: Start difference. First operand has 288 places, 384 transitions, 4708 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:35:52,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 406 transitions, 5614 flow [2024-06-14 11:35:55,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 406 transitions, 5316 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:55,884 INFO L231 Difference]: Finished difference. Result has 288 places, 386 transitions, 4559 flow [2024-06-14 11:35:55,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4410, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4559, PETRI_PLACES=288, PETRI_TRANSITIONS=386} [2024-06-14 11:35:55,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 11:35:55,885 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 386 transitions, 4559 flow [2024-06-14 11:35:55,885 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) [2024-06-14 11:35:55,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:55,885 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] [2024-06-14 11:35:55,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:35:55,885 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:55,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:55,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1703966178, now seen corresponding path program 2 times [2024-06-14 11:35:55,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:55,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453485588] [2024-06-14 11:35:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:55,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:55,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:55,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453485588] [2024-06-14 11:35:55,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453485588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:55,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:55,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:55,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958512262] [2024-06-14 11:35:55,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:55,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:55,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:55,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:35:55,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 386 transitions, 4559 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) [2024-06-14 11:35:55,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:55,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:35:55,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:57,023 INFO L124 PetriNetUnfolderBase]: 4136/7166 cut-off events. [2024-06-14 11:35:57,023 INFO L125 PetriNetUnfolderBase]: For 851561/851561 co-relation queries the response was YES. [2024-06-14 11:35:57,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49450 conditions, 7166 events. 4136/7166 cut-off events. For 851561/851561 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51264 event pairs, 1202 based on Foata normal form. 2/7164 useless extension candidates. Maximal degree in co-relation 49308. Up to 6392 conditions per place. [2024-06-14 11:35:57,116 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 353 selfloop transitions, 45 changer transitions 0/406 dead transitions. [2024-06-14 11:35:57,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 406 transitions, 5725 flow [2024-06-14 11:35:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:35:57,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 11:35:57,117 INFO L175 Difference]: Start difference. First operand has 288 places, 386 transitions, 4559 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:35:57,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 406 transitions, 5725 flow [2024-06-14 11:36:00,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 406 transitions, 5598 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:00,655 INFO L231 Difference]: Finished difference. Result has 290 places, 390 transitions, 4660 flow [2024-06-14 11:36:00,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4432, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4660, PETRI_PLACES=290, PETRI_TRANSITIONS=390} [2024-06-14 11:36:00,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-14 11:36:00,655 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 390 transitions, 4660 flow [2024-06-14 11:36:00,656 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) [2024-06-14 11:36:00,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:00,656 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] [2024-06-14 11:36:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:36:00,656 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:00,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1687776738, now seen corresponding path program 3 times [2024-06-14 11:36:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261889670] [2024-06-14 11:36:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:00,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261889670] [2024-06-14 11:36:00,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261889670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:00,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:00,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:00,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111699361] [2024-06-14 11:36:00,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:00,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:00,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:00,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:00,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 390 transitions, 4660 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) [2024-06-14 11:36:00,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:00,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:00,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:01,811 INFO L124 PetriNetUnfolderBase]: 4131/7159 cut-off events. [2024-06-14 11:36:01,812 INFO L125 PetriNetUnfolderBase]: For 856932/856932 co-relation queries the response was YES. [2024-06-14 11:36:01,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49294 conditions, 7159 events. 4131/7159 cut-off events. For 856932/856932 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51292 event pairs, 1203 based on Foata normal form. 2/7157 useless extension candidates. Maximal degree in co-relation 49151. Up to 6430 conditions per place. [2024-06-14 11:36:01,904 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 360 selfloop transitions, 39 changer transitions 0/407 dead transitions. [2024-06-14 11:36:01,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 407 transitions, 5500 flow [2024-06-14 11:36:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:36:01,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 11:36:01,906 INFO L175 Difference]: Start difference. First operand has 290 places, 390 transitions, 4660 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:36:01,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 407 transitions, 5500 flow [2024-06-14 11:36:04,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 407 transitions, 5362 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:04,969 INFO L231 Difference]: Finished difference. Result has 294 places, 390 transitions, 4605 flow [2024-06-14 11:36:04,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4605, PETRI_PLACES=294, PETRI_TRANSITIONS=390} [2024-06-14 11:36:04,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 11:36:04,969 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 390 transitions, 4605 flow [2024-06-14 11:36:04,969 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) [2024-06-14 11:36:04,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:04,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:04,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:36:04,970 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:04,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1745265796, now seen corresponding path program 4 times [2024-06-14 11:36:04,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:04,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773604522] [2024-06-14 11:36:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:05,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:05,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773604522] [2024-06-14 11:36:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773604522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:05,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:05,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645209169] [2024-06-14 11:36:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:05,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:05,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 390 transitions, 4605 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) [2024-06-14 11:36:05,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:05,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:05,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:06,140 INFO L124 PetriNetUnfolderBase]: 4139/7170 cut-off events. [2024-06-14 11:36:06,140 INFO L125 PetriNetUnfolderBase]: For 872188/872188 co-relation queries the response was YES. [2024-06-14 11:36:06,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49556 conditions, 7170 events. 4139/7170 cut-off events. For 872188/872188 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 51315 event pairs, 1195 based on Foata normal form. 2/7165 useless extension candidates. Maximal degree in co-relation 49411. Up to 6416 conditions per place. [2024-06-14 11:36:06,233 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 359 selfloop transitions, 43 changer transitions 0/410 dead transitions. [2024-06-14 11:36:06,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 410 transitions, 5521 flow [2024-06-14 11:36:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 11:36:06,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852713178294574 [2024-06-14 11:36:06,234 INFO L175 Difference]: Start difference. First operand has 294 places, 390 transitions, 4605 flow. Second operand 6 states and 151 transitions. [2024-06-14 11:36:06,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 410 transitions, 5521 flow [2024-06-14 11:36:09,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 410 transitions, 5420 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:09,647 INFO L231 Difference]: Finished difference. Result has 295 places, 392 transitions, 4667 flow [2024-06-14 11:36:09,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4667, PETRI_PLACES=295, PETRI_TRANSITIONS=392} [2024-06-14 11:36:09,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 11:36:09,647 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 392 transitions, 4667 flow [2024-06-14 11:36:09,647 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) [2024-06-14 11:36:09,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:09,648 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] [2024-06-14 11:36:09,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:36:09,648 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:09,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2035806750, now seen corresponding path program 5 times [2024-06-14 11:36:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:09,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405058032] [2024-06-14 11:36:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:09,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:09,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:09,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405058032] [2024-06-14 11:36:09,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405058032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:09,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:09,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:09,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245120097] [2024-06-14 11:36:09,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:09,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:09,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:09,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:09,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:09,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:09,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 392 transitions, 4667 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) [2024-06-14 11:36:09,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:09,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:09,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:10,823 INFO L124 PetriNetUnfolderBase]: 4147/7188 cut-off events. [2024-06-14 11:36:10,824 INFO L125 PetriNetUnfolderBase]: For 890547/890547 co-relation queries the response was YES. [2024-06-14 11:36:10,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49920 conditions, 7188 events. 4147/7188 cut-off events. For 890547/890547 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51635 event pairs, 1181 based on Foata normal form. 2/7181 useless extension candidates. Maximal degree in co-relation 49774. Up to 6317 conditions per place. [2024-06-14 11:36:10,923 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 348 selfloop transitions, 53 changer transitions 0/409 dead transitions. [2024-06-14 11:36:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 409 transitions, 5822 flow [2024-06-14 11:36:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:36:10,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562015503875969 [2024-06-14 11:36:10,925 INFO L175 Difference]: Start difference. First operand has 295 places, 392 transitions, 4667 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:36:10,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 409 transitions, 5822 flow [2024-06-14 11:36:14,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 409 transitions, 5681 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:14,779 INFO L231 Difference]: Finished difference. Result has 297 places, 395 transitions, 4750 flow [2024-06-14 11:36:14,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4750, PETRI_PLACES=297, PETRI_TRANSITIONS=395} [2024-06-14 11:36:14,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 11:36:14,780 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 395 transitions, 4750 flow [2024-06-14 11:36:14,780 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) [2024-06-14 11:36:14,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:14,780 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] [2024-06-14 11:36:14,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:36:14,780 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:14,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2029140510, now seen corresponding path program 6 times [2024-06-14 11:36:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:14,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835327318] [2024-06-14 11:36:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:14,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:14,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835327318] [2024-06-14 11:36:14,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835327318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:14,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:14,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:14,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705271614] [2024-06-14 11:36:14,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:14,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:14,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:14,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:14,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 395 transitions, 4750 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) [2024-06-14 11:36:14,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:14,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:14,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:16,058 INFO L124 PetriNetUnfolderBase]: 4142/7177 cut-off events. [2024-06-14 11:36:16,058 INFO L125 PetriNetUnfolderBase]: For 895205/895205 co-relation queries the response was YES. [2024-06-14 11:36:16,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49763 conditions, 7177 events. 4142/7177 cut-off events. For 895205/895205 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51494 event pairs, 1181 based on Foata normal form. 2/7170 useless extension candidates. Maximal degree in co-relation 49616. Up to 6313 conditions per place. [2024-06-14 11:36:16,144 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 348 selfloop transitions, 52 changer transitions 0/408 dead transitions. [2024-06-14 11:36:16,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 408 transitions, 5580 flow [2024-06-14 11:36:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:36:16,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 11:36:16,146 INFO L175 Difference]: Start difference. First operand has 297 places, 395 transitions, 4750 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:36:16,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 408 transitions, 5580 flow [2024-06-14 11:36:19,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 408 transitions, 5414 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:19,139 INFO L231 Difference]: Finished difference. Result has 301 places, 395 transitions, 4693 flow [2024-06-14 11:36:19,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4584, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4693, PETRI_PLACES=301, PETRI_TRANSITIONS=395} [2024-06-14 11:36:19,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 11:36:19,139 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 395 transitions, 4693 flow [2024-06-14 11:36:19,139 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) [2024-06-14 11:36:19,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:19,140 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] [2024-06-14 11:36:19,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:36:19,140 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:19,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -579159596, now seen corresponding path program 1 times [2024-06-14 11:36:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:19,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735772054] [2024-06-14 11:36:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:19,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735772054] [2024-06-14 11:36:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735772054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:19,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:19,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:19,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893180396] [2024-06-14 11:36:19,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:19,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:19,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:19,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:19,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:19,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:19,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 395 transitions, 4693 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:19,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:19,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:19,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:20,474 INFO L124 PetriNetUnfolderBase]: 4340/7493 cut-off events. [2024-06-14 11:36:20,474 INFO L125 PetriNetUnfolderBase]: For 1120346/1120346 co-relation queries the response was YES. [2024-06-14 11:36:20,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55163 conditions, 7493 events. 4340/7493 cut-off events. For 1120346/1120346 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 53954 event pairs, 1057 based on Foata normal form. 12/7501 useless extension candidates. Maximal degree in co-relation 55014. Up to 5948 conditions per place. [2024-06-14 11:36:20,573 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 335 selfloop transitions, 93 changer transitions 0/436 dead transitions. [2024-06-14 11:36:20,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 436 transitions, 6337 flow [2024-06-14 11:36:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:36:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:36:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-14 11:36:20,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 11:36:20,574 INFO L175 Difference]: Start difference. First operand has 301 places, 395 transitions, 4693 flow. Second operand 9 states and 228 transitions. [2024-06-14 11:36:20,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 436 transitions, 6337 flow [2024-06-14 11:36:23,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 436 transitions, 6185 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:23,941 INFO L231 Difference]: Finished difference. Result has 305 places, 400 transitions, 4916 flow [2024-06-14 11:36:23,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4916, PETRI_PLACES=305, PETRI_TRANSITIONS=400} [2024-06-14 11:36:23,941 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 11:36:23,941 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 400 transitions, 4916 flow [2024-06-14 11:36:23,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:23,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:23,942 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] [2024-06-14 11:36:23,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:36:23,942 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:23,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash -66603608, now seen corresponding path program 2 times [2024-06-14 11:36:23,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:23,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197754058] [2024-06-14 11:36:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:23,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:24,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197754058] [2024-06-14 11:36:24,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197754058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:24,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:24,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:24,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044968646] [2024-06-14 11:36:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:24,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:24,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:24,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 400 transitions, 4916 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:24,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:24,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:24,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:25,369 INFO L124 PetriNetUnfolderBase]: 4383/7589 cut-off events. [2024-06-14 11:36:25,369 INFO L125 PetriNetUnfolderBase]: For 1157203/1157203 co-relation queries the response was YES. [2024-06-14 11:36:25,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55974 conditions, 7589 events. 4383/7589 cut-off events. For 1157203/1157203 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 54998 event pairs, 1289 based on Foata normal form. 16/7601 useless extension candidates. Maximal degree in co-relation 55824. Up to 6622 conditions per place. [2024-06-14 11:36:25,470 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 85 changer transitions 0/424 dead transitions. [2024-06-14 11:36:25,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 424 transitions, 5872 flow [2024-06-14 11:36:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:36:25,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 11:36:25,471 INFO L175 Difference]: Start difference. First operand has 305 places, 400 transitions, 4916 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:36:25,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 424 transitions, 5872 flow [2024-06-14 11:36:28,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 424 transitions, 5707 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:28,920 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 4989 flow [2024-06-14 11:36:28,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4989, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-14 11:36:28,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-14 11:36:28,920 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 4989 flow [2024-06-14 11:36:28,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:28,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:28,921 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] [2024-06-14 11:36:28,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:36:28,921 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:28,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash -66751478, now seen corresponding path program 3 times [2024-06-14 11:36:28,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:28,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960103629] [2024-06-14 11:36:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:28,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:29,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:29,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960103629] [2024-06-14 11:36:29,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960103629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:29,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:29,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908145223] [2024-06-14 11:36:29,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:29,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:29,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:29,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:29,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 4989 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:29,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:29,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:29,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:30,319 INFO L124 PetriNetUnfolderBase]: 4397/7621 cut-off events. [2024-06-14 11:36:30,319 INFO L125 PetriNetUnfolderBase]: For 1119011/1119011 co-relation queries the response was YES. [2024-06-14 11:36:30,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 7621 events. 4397/7621 cut-off events. For 1119011/1119011 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 55263 event pairs, 1274 based on Foata normal form. 12/7629 useless extension candidates. Maximal degree in co-relation 55464. Up to 6488 conditions per place. [2024-06-14 11:36:30,430 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 340 selfloop transitions, 83 changer transitions 0/431 dead transitions. [2024-06-14 11:36:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 431 transitions, 6255 flow [2024-06-14 11:36:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:36:30,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843023255813954 [2024-06-14 11:36:30,431 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 4989 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:36:30,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 431 transitions, 6255 flow [2024-06-14 11:36:34,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 431 transitions, 6045 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:34,452 INFO L231 Difference]: Finished difference. Result has 312 places, 405 transitions, 5088 flow [2024-06-14 11:36:34,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4779, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5088, PETRI_PLACES=312, PETRI_TRANSITIONS=405} [2024-06-14 11:36:34,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 11:36:34,453 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 405 transitions, 5088 flow [2024-06-14 11:36:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:34,453 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] [2024-06-14 11:36:34,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:36:34,453 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:34,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:34,453 INFO L85 PathProgramCache]: Analyzing trace with hash -2004883818, now seen corresponding path program 4 times [2024-06-14 11:36:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:34,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512584630] [2024-06-14 11:36:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:34,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512584630] [2024-06-14 11:36:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512584630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:34,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:34,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485074696] [2024-06-14 11:36:34,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:34,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:34,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:34,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 405 transitions, 5088 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:34,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:34,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:35,830 INFO L124 PetriNetUnfolderBase]: 4453/7685 cut-off events. [2024-06-14 11:36:35,830 INFO L125 PetriNetUnfolderBase]: For 1170957/1170957 co-relation queries the response was YES. [2024-06-14 11:36:35,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 7685 events. 4453/7685 cut-off events. For 1170957/1170957 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55693 event pairs, 1324 based on Foata normal form. 16/7683 useless extension candidates. Maximal degree in co-relation 56139. Up to 6736 conditions per place. [2024-06-14 11:36:35,939 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 323 selfloop transitions, 91 changer transitions 0/422 dead transitions. [2024-06-14 11:36:35,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 6024 flow [2024-06-14 11:36:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:36:35,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:36:35,940 INFO L175 Difference]: Start difference. First operand has 312 places, 405 transitions, 5088 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:36:35,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 6024 flow [2024-06-14 11:36:39,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 422 transitions, 5719 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:39,407 INFO L231 Difference]: Finished difference. Result has 312 places, 407 transitions, 5035 flow [2024-06-14 11:36:39,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5035, PETRI_PLACES=312, PETRI_TRANSITIONS=407} [2024-06-14 11:36:39,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 11:36:39,407 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 407 transitions, 5035 flow [2024-06-14 11:36:39,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:39,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:39,408 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] [2024-06-14 11:36:39,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:36:39,408 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:39,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1211386992, now seen corresponding path program 5 times [2024-06-14 11:36:39,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:39,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642910717] [2024-06-14 11:36:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:39,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:39,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642910717] [2024-06-14 11:36:39,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642910717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:39,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:39,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691166887] [2024-06-14 11:36:39,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:39,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:39,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:39,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:39,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 407 transitions, 5035 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:39,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:39,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:39,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:40,803 INFO L124 PetriNetUnfolderBase]: 4509/7789 cut-off events. [2024-06-14 11:36:40,803 INFO L125 PetriNetUnfolderBase]: For 1186944/1186944 co-relation queries the response was YES. [2024-06-14 11:36:40,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56426 conditions, 7789 events. 4509/7789 cut-off events. For 1186944/1186944 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 56630 event pairs, 1346 based on Foata normal form. 16/7787 useless extension candidates. Maximal degree in co-relation 56272. Up to 6824 conditions per place. [2024-06-14 11:36:40,906 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 333 selfloop transitions, 83 changer transitions 0/424 dead transitions. [2024-06-14 11:36:40,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 424 transitions, 5979 flow [2024-06-14 11:36:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:36:40,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681063122923588 [2024-06-14 11:36:40,908 INFO L175 Difference]: Start difference. First operand has 312 places, 407 transitions, 5035 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:36:40,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 424 transitions, 5979 flow [2024-06-14 11:36:45,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 424 transitions, 5751 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:45,378 INFO L231 Difference]: Finished difference. Result has 314 places, 409 transitions, 5047 flow [2024-06-14 11:36:45,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5047, PETRI_PLACES=314, PETRI_TRANSITIONS=409} [2024-06-14 11:36:45,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 11:36:45,380 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 409 transitions, 5047 flow [2024-06-14 11:36:45,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:45,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:45,380 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] [2024-06-14 11:36:45,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:36:45,380 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:45,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash 687520330, now seen corresponding path program 6 times [2024-06-14 11:36:45,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:45,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339523252] [2024-06-14 11:36:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:45,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:45,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339523252] [2024-06-14 11:36:45,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339523252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:45,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:45,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:45,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764767938] [2024-06-14 11:36:45,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:45,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:45,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:45,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 409 transitions, 5047 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:45,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:45,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:45,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:46,757 INFO L124 PetriNetUnfolderBase]: 4576/7892 cut-off events. [2024-06-14 11:36:46,757 INFO L125 PetriNetUnfolderBase]: For 1210033/1210033 co-relation queries the response was YES. [2024-06-14 11:36:46,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57604 conditions, 7892 events. 4576/7892 cut-off events. For 1210033/1210033 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 57377 event pairs, 1342 based on Foata normal form. 12/7886 useless extension candidates. Maximal degree in co-relation 57449. Up to 6691 conditions per place. [2024-06-14 11:36:46,870 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 341 selfloop transitions, 83 changer transitions 0/432 dead transitions. [2024-06-14 11:36:46,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 432 transitions, 6345 flow [2024-06-14 11:36:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:36:46,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-14 11:36:46,871 INFO L175 Difference]: Start difference. First operand has 314 places, 409 transitions, 5047 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:36:46,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 432 transitions, 6345 flow [2024-06-14 11:36:51,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 432 transitions, 6129 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:51,067 INFO L231 Difference]: Finished difference. Result has 317 places, 413 transitions, 5187 flow [2024-06-14 11:36:51,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5187, PETRI_PLACES=317, PETRI_TRANSITIONS=413} [2024-06-14 11:36:51,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 11:36:51,067 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 413 transitions, 5187 flow [2024-06-14 11:36:51,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:51,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:51,068 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] [2024-06-14 11:36:51,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:36:51,068 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:51,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:51,069 INFO L85 PathProgramCache]: Analyzing trace with hash 894594502, now seen corresponding path program 1 times [2024-06-14 11:36:51,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:51,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162147884] [2024-06-14 11:36:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:51,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162147884] [2024-06-14 11:36:51,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162147884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:51,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:51,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:51,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165564204] [2024-06-14 11:36:51,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:51,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:51,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:51,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:51,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 413 transitions, 5187 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:51,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:51,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:51,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:52,488 INFO L124 PetriNetUnfolderBase]: 4616/7970 cut-off events. [2024-06-14 11:36:52,489 INFO L125 PetriNetUnfolderBase]: For 1236497/1236497 co-relation queries the response was YES. [2024-06-14 11:36:52,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58163 conditions, 7970 events. 4616/7970 cut-off events. For 1236497/1236497 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 58135 event pairs, 1312 based on Foata normal form. 12/7964 useless extension candidates. Maximal degree in co-relation 58006. Up to 6797 conditions per place. [2024-06-14 11:36:52,599 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 325 selfloop transitions, 100 changer transitions 0/433 dead transitions. [2024-06-14 11:36:52,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 433 transitions, 6169 flow [2024-06-14 11:36:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:36:52,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:36:52,600 INFO L175 Difference]: Start difference. First operand has 317 places, 413 transitions, 5187 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:36:52,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 433 transitions, 6169 flow [2024-06-14 11:36:56,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 433 transitions, 5994 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:56,756 INFO L231 Difference]: Finished difference. Result has 321 places, 415 transitions, 5293 flow [2024-06-14 11:36:56,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5293, PETRI_PLACES=321, PETRI_TRANSITIONS=415} [2024-06-14 11:36:56,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 11:36:56,757 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 415 transitions, 5293 flow [2024-06-14 11:36:56,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:56,758 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] [2024-06-14 11:36:56,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:36:56,758 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:56,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2018377316, now seen corresponding path program 7 times [2024-06-14 11:36:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:56,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241762180] [2024-06-14 11:36:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:56,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:56,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241762180] [2024-06-14 11:36:56,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241762180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:56,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:56,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:56,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705040876] [2024-06-14 11:36:56,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:56,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:56,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:56,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:36:56,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 415 transitions, 5293 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:56,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:36:56,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:58,226 INFO L124 PetriNetUnfolderBase]: 4656/8031 cut-off events. [2024-06-14 11:36:58,226 INFO L125 PetriNetUnfolderBase]: For 1253306/1253306 co-relation queries the response was YES. [2024-06-14 11:36:58,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58564 conditions, 8031 events. 4656/8031 cut-off events. For 1253306/1253306 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 58477 event pairs, 1132 based on Foata normal form. 12/8039 useless extension candidates. Maximal degree in co-relation 58405. Up to 6704 conditions per place. [2024-06-14 11:36:58,338 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 343 selfloop transitions, 92 changer transitions 2/445 dead transitions. [2024-06-14 11:36:58,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 445 transitions, 6510 flow [2024-06-14 11:36:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:36:58,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112956810631229 [2024-06-14 11:36:58,340 INFO L175 Difference]: Start difference. First operand has 321 places, 415 transitions, 5293 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:36:58,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 445 transitions, 6510 flow [2024-06-14 11:37:01,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 445 transitions, 6249 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:01,946 INFO L231 Difference]: Finished difference. Result has 323 places, 415 transitions, 5235 flow [2024-06-14 11:37:01,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5235, PETRI_PLACES=323, PETRI_TRANSITIONS=415} [2024-06-14 11:37:01,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-14 11:37:01,947 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 415 transitions, 5235 flow [2024-06-14 11:37:01,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:01,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:01,947 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] [2024-06-14 11:37:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:37:01,948 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:01,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -186805434, now seen corresponding path program 8 times [2024-06-14 11:37:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:01,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679246836] [2024-06-14 11:37:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:01,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:02,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:02,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679246836] [2024-06-14 11:37:02,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679246836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:02,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:02,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645358780] [2024-06-14 11:37:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:02,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:02,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:02,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:02,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 415 transitions, 5235 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:02,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:02,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:02,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:03,591 INFO L124 PetriNetUnfolderBase]: 4688/8084 cut-off events. [2024-06-14 11:37:03,592 INFO L125 PetriNetUnfolderBase]: For 1298123/1298123 co-relation queries the response was YES. [2024-06-14 11:37:03,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58722 conditions, 8084 events. 4688/8084 cut-off events. For 1298123/1298123 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 59006 event pairs, 1356 based on Foata normal form. 16/8096 useless extension candidates. Maximal degree in co-relation 58562. Up to 7113 conditions per place. [2024-06-14 11:37:03,690 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 81 changer transitions 2/438 dead transitions. [2024-06-14 11:37:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 438 transitions, 6190 flow [2024-06-14 11:37:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:37:03,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 11:37:03,691 INFO L175 Difference]: Start difference. First operand has 323 places, 415 transitions, 5235 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:37:03,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 438 transitions, 6190 flow [2024-06-14 11:37:07,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 438 transitions, 6028 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:07,300 INFO L231 Difference]: Finished difference. Result has 326 places, 415 transitions, 5253 flow [2024-06-14 11:37:07,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5253, PETRI_PLACES=326, PETRI_TRANSITIONS=415} [2024-06-14 11:37:07,300 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 11:37:07,300 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 415 transitions, 5253 flow [2024-06-14 11:37:07,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:07,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:07,301 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] [2024-06-14 11:37:07,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:37:07,301 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:07,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1696350594, now seen corresponding path program 9 times [2024-06-14 11:37:07,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:07,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486690508] [2024-06-14 11:37:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:07,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:07,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:07,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486690508] [2024-06-14 11:37:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486690508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:07,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:07,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138836068] [2024-06-14 11:37:07,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:07,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:07,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:07,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:07,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 415 transitions, 5253 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:07,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:07,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:07,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:08,744 INFO L124 PetriNetUnfolderBase]: 4711/8106 cut-off events. [2024-06-14 11:37:08,745 INFO L125 PetriNetUnfolderBase]: For 1320808/1320808 co-relation queries the response was YES. [2024-06-14 11:37:08,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59005 conditions, 8106 events. 4711/8106 cut-off events. For 1320808/1320808 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 59167 event pairs, 1389 based on Foata normal form. 16/8109 useless extension candidates. Maximal degree in co-relation 58844. Up to 7153 conditions per place. [2024-06-14 11:37:08,866 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 337 selfloop transitions, 86 changer transitions 1/432 dead transitions. [2024-06-14 11:37:08,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 432 transitions, 6183 flow [2024-06-14 11:37:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 11:37:08,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 11:37:08,868 INFO L175 Difference]: Start difference. First operand has 326 places, 415 transitions, 5253 flow. Second operand 7 states and 168 transitions. [2024-06-14 11:37:08,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 432 transitions, 6183 flow [2024-06-14 11:37:12,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 432 transitions, 6018 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:12,459 INFO L231 Difference]: Finished difference. Result has 328 places, 416 transitions, 5287 flow [2024-06-14 11:37:12,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5088, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5287, PETRI_PLACES=328, PETRI_TRANSITIONS=416} [2024-06-14 11:37:12,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-14 11:37:12,459 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 416 transitions, 5287 flow [2024-06-14 11:37:12,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:12,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:12,460 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] [2024-06-14 11:37:12,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:37:12,460 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:12,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:12,460 INFO L85 PathProgramCache]: Analyzing trace with hash 12496356, now seen corresponding path program 10 times [2024-06-14 11:37:12,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127983573] [2024-06-14 11:37:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:12,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127983573] [2024-06-14 11:37:12,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127983573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:12,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:12,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641809873] [2024-06-14 11:37:12,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:12,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:12,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:12,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:12,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:12,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 416 transitions, 5287 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:12,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:12,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:12,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:13,896 INFO L124 PetriNetUnfolderBase]: 4627/7963 cut-off events. [2024-06-14 11:37:13,896 INFO L125 PetriNetUnfolderBase]: For 1232165/1232165 co-relation queries the response was YES. [2024-06-14 11:37:13,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56645 conditions, 7963 events. 4627/7963 cut-off events. For 1232165/1232165 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 57951 event pairs, 1304 based on Foata normal form. 16/7975 useless extension candidates. Maximal degree in co-relation 56483. Up to 7021 conditions per place. [2024-06-14 11:37:14,013 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 81 changer transitions 1/434 dead transitions. [2024-06-14 11:37:14,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 434 transitions, 6195 flow [2024-06-14 11:37:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:14,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574750830564784 [2024-06-14 11:37:14,015 INFO L175 Difference]: Start difference. First operand has 328 places, 416 transitions, 5287 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:14,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 434 transitions, 6195 flow [2024-06-14 11:37:17,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 434 transitions, 6016 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:17,686 INFO L231 Difference]: Finished difference. Result has 330 places, 415 transitions, 5259 flow [2024-06-14 11:37:17,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5108, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5259, PETRI_PLACES=330, PETRI_TRANSITIONS=415} [2024-06-14 11:37:17,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 11:37:17,687 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 415 transitions, 5259 flow [2024-06-14 11:37:17,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:17,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:17,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:37:17,687 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:17,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1703975106, now seen corresponding path program 2 times [2024-06-14 11:37:17,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:17,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280201126] [2024-06-14 11:37:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:17,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:17,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280201126] [2024-06-14 11:37:17,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280201126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:17,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:17,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:17,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771441760] [2024-06-14 11:37:17,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:17,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:17,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:17,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:17,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 415 transitions, 5259 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:17,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:17,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:17,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:19,236 INFO L124 PetriNetUnfolderBase]: 4555/7836 cut-off events. [2024-06-14 11:37:19,236 INFO L125 PetriNetUnfolderBase]: For 1227124/1227124 co-relation queries the response was YES. [2024-06-14 11:37:19,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56602 conditions, 7836 events. 4555/7836 cut-off events. For 1227124/1227124 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 56900 event pairs, 1279 based on Foata normal form. 12/7835 useless extension candidates. Maximal degree in co-relation 56439. Up to 6849 conditions per place. [2024-06-14 11:37:19,331 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 337 selfloop transitions, 90 changer transitions 0/435 dead transitions. [2024-06-14 11:37:19,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 435 transitions, 6249 flow [2024-06-14 11:37:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:37:19,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:37:19,332 INFO L175 Difference]: Start difference. First operand has 330 places, 415 transitions, 5259 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:37:19,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 435 transitions, 6249 flow [2024-06-14 11:37:23,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 435 transitions, 6011 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:23,412 INFO L231 Difference]: Finished difference. Result has 330 places, 417 transitions, 5286 flow [2024-06-14 11:37:23,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5286, PETRI_PLACES=330, PETRI_TRANSITIONS=417} [2024-06-14 11:37:23,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 11:37:23,413 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 417 transitions, 5286 flow [2024-06-14 11:37:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:23,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:23,413 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] [2024-06-14 11:37:23,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:37:23,413 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:23,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2029131582, now seen corresponding path program 3 times [2024-06-14 11:37:23,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:23,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781825453] [2024-06-14 11:37:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:23,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781825453] [2024-06-14 11:37:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781825453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:23,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:23,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753445498] [2024-06-14 11:37:23,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:23,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:23,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:23,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 417 transitions, 5286 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:23,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:23,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:23,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:24,834 INFO L124 PetriNetUnfolderBase]: 4628/7977 cut-off events. [2024-06-14 11:37:24,834 INFO L125 PetriNetUnfolderBase]: For 1295041/1295041 co-relation queries the response was YES. [2024-06-14 11:37:24,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58394 conditions, 7977 events. 4628/7977 cut-off events. For 1295041/1295041 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 58149 event pairs, 1270 based on Foata normal form. 12/7976 useless extension candidates. Maximal degree in co-relation 58230. Up to 6454 conditions per place. [2024-06-14 11:37:24,950 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 322 selfloop transitions, 110 changer transitions 0/440 dead transitions. [2024-06-14 11:37:24,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 440 transitions, 6570 flow [2024-06-14 11:37:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:24,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574750830564784 [2024-06-14 11:37:24,951 INFO L175 Difference]: Start difference. First operand has 330 places, 417 transitions, 5286 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:24,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 440 transitions, 6570 flow [2024-06-14 11:37:29,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 440 transitions, 6325 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:29,703 INFO L231 Difference]: Finished difference. Result has 332 places, 420 transitions, 5386 flow [2024-06-14 11:37:29,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5041, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5386, PETRI_PLACES=332, PETRI_TRANSITIONS=420} [2024-06-14 11:37:29,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 11:37:29,703 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 420 transitions, 5386 flow [2024-06-14 11:37:29,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:29,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:29,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:29,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:37:29,704 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:29,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash 20120868, now seen corresponding path program 4 times [2024-06-14 11:37:29,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170570198] [2024-06-14 11:37:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:29,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170570198] [2024-06-14 11:37:29,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170570198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:29,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:29,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433442095] [2024-06-14 11:37:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:29,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:29,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 420 transitions, 5386 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:29,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:29,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:29,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:31,183 INFO L124 PetriNetUnfolderBase]: 4602/7946 cut-off events. [2024-06-14 11:37:31,183 INFO L125 PetriNetUnfolderBase]: For 1225997/1225997 co-relation queries the response was YES. [2024-06-14 11:37:31,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56687 conditions, 7946 events. 4602/7946 cut-off events. For 1225997/1225997 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57911 event pairs, 1269 based on Foata normal form. 12/7954 useless extension candidates. Maximal degree in co-relation 56522. Up to 6894 conditions per place. [2024-06-14 11:37:31,328 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 86 changer transitions 0/441 dead transitions. [2024-06-14 11:37:31,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 441 transitions, 6320 flow [2024-06-14 11:37:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:37:31,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 11:37:31,329 INFO L175 Difference]: Start difference. First operand has 332 places, 420 transitions, 5386 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:37:31,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 441 transitions, 6320 flow [2024-06-14 11:37:37,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 441 transitions, 6051 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:37,016 INFO L231 Difference]: Finished difference. Result has 335 places, 420 transitions, 5294 flow [2024-06-14 11:37:37,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5294, PETRI_PLACES=335, PETRI_TRANSITIONS=420} [2024-06-14 11:37:37,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-14 11:37:37,016 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 420 transitions, 5294 flow [2024-06-14 11:37:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:37,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:37,017 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] [2024-06-14 11:37:37,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:37:37,017 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:37,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2047019279, now seen corresponding path program 1 times [2024-06-14 11:37:37,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:37,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870307159] [2024-06-14 11:37:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:37,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870307159] [2024-06-14 11:37:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870307159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298451010] [2024-06-14 11:37:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:37,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:37,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:37,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 420 transitions, 5294 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:37,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:37,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:37,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:38,523 INFO L124 PetriNetUnfolderBase]: 4607/7954 cut-off events. [2024-06-14 11:37:38,523 INFO L125 PetriNetUnfolderBase]: For 1157544/1157544 co-relation queries the response was YES. [2024-06-14 11:37:38,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56456 conditions, 7954 events. 4607/7954 cut-off events. For 1157544/1157544 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57943 event pairs, 1237 based on Foata normal form. 1/7953 useless extension candidates. Maximal degree in co-relation 56290. Up to 7246 conditions per place. [2024-06-14 11:37:38,632 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 420 selfloop transitions, 27 changer transitions 0/455 dead transitions. [2024-06-14 11:37:38,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 455 transitions, 6552 flow [2024-06-14 11:37:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:37:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:37:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 11:37:38,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607235142118863 [2024-06-14 11:37:38,633 INFO L175 Difference]: Start difference. First operand has 335 places, 420 transitions, 5294 flow. Second operand 9 states and 217 transitions. [2024-06-14 11:37:38,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 455 transitions, 6552 flow [2024-06-14 11:37:43,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 455 transitions, 6269 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 11:37:43,832 INFO L231 Difference]: Finished difference. Result has 336 places, 423 transitions, 5113 flow [2024-06-14 11:37:43,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5113, PETRI_PLACES=336, PETRI_TRANSITIONS=423} [2024-06-14 11:37:43,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 11:37:43,833 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 423 transitions, 5113 flow [2024-06-14 11:37:43,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:43,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:43,833 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] [2024-06-14 11:37:43,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:37:43,833 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:43,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash -751442699, now seen corresponding path program 2 times [2024-06-14 11:37:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:43,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231570509] [2024-06-14 11:37:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:43,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:43,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:43,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231570509] [2024-06-14 11:37:43,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231570509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:43,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:43,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:43,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412411529] [2024-06-14 11:37:43,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:43,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:43,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:43,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:43,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 423 transitions, 5113 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:43,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:43,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:43,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:45,448 INFO L124 PetriNetUnfolderBase]: 4604/7958 cut-off events. [2024-06-14 11:37:45,448 INFO L125 PetriNetUnfolderBase]: For 1162916/1162916 co-relation queries the response was YES. [2024-06-14 11:37:45,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55643 conditions, 7958 events. 4604/7958 cut-off events. For 1162916/1162916 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 58076 event pairs, 1245 based on Foata normal form. 1/7957 useless extension candidates. Maximal degree in co-relation 55478. Up to 7243 conditions per place. [2024-06-14 11:37:45,542 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 415 selfloop transitions, 27 changer transitions 0/450 dead transitions. [2024-06-14 11:37:45,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 450 transitions, 6065 flow [2024-06-14 11:37:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:37:45,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563953488372093 [2024-06-14 11:37:45,543 INFO L175 Difference]: Start difference. First operand has 336 places, 423 transitions, 5113 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:37:45,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 450 transitions, 6065 flow [2024-06-14 11:37:50,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 450 transitions, 5997 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:50,883 INFO L231 Difference]: Finished difference. Result has 337 places, 423 transitions, 5105 flow [2024-06-14 11:37:50,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5105, PETRI_PLACES=337, PETRI_TRANSITIONS=423} [2024-06-14 11:37:50,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-14 11:37:50,884 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 423 transitions, 5105 flow [2024-06-14 11:37:50,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:50,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:50,884 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] [2024-06-14 11:37:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:37:50,885 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:50,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1369888363, now seen corresponding path program 1 times [2024-06-14 11:37:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:50,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797664100] [2024-06-14 11:37:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:50,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797664100] [2024-06-14 11:37:50,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797664100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:50,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:50,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443418750] [2024-06-14 11:37:50,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:50,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:50,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:51,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:51,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 423 transitions, 5105 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:51,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:51,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:52,411 INFO L124 PetriNetUnfolderBase]: 4625/7963 cut-off events. [2024-06-14 11:37:52,412 INFO L125 PetriNetUnfolderBase]: For 1214515/1214515 co-relation queries the response was YES. [2024-06-14 11:37:52,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56559 conditions, 7963 events. 4625/7963 cut-off events. For 1214515/1214515 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57947 event pairs, 1244 based on Foata normal form. 2/7936 useless extension candidates. Maximal degree in co-relation 56393. Up to 7009 conditions per place. [2024-06-14 11:37:52,525 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 337 selfloop transitions, 113 changer transitions 2/460 dead transitions. [2024-06-14 11:37:52,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 460 transitions, 6549 flow [2024-06-14 11:37:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:37:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:37:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 11:37:52,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5839793281653747 [2024-06-14 11:37:52,527 INFO L175 Difference]: Start difference. First operand has 337 places, 423 transitions, 5105 flow. Second operand 9 states and 226 transitions. [2024-06-14 11:37:52,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 460 transitions, 6549 flow [2024-06-14 11:37:58,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 460 transitions, 6485 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:58,040 INFO L231 Difference]: Finished difference. Result has 340 places, 427 transitions, 5491 flow [2024-06-14 11:37:58,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5041, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5491, PETRI_PLACES=340, PETRI_TRANSITIONS=427} [2024-06-14 11:37:58,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-14 11:37:58,040 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 427 transitions, 5491 flow [2024-06-14 11:37:58,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:58,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:58,041 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] [2024-06-14 11:37:58,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:37:58,041 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:58,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1023501867, now seen corresponding path program 2 times [2024-06-14 11:37:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:58,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758973414] [2024-06-14 11:37:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:58,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:58,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758973414] [2024-06-14 11:37:58,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758973414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:58,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:58,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223815484] [2024-06-14 11:37:58,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:58,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:58,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:37:58,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 427 transitions, 5491 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:58,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:58,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:37:58,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:59,589 INFO L124 PetriNetUnfolderBase]: 4620/7966 cut-off events. [2024-06-14 11:37:59,589 INFO L125 PetriNetUnfolderBase]: For 1216814/1216814 co-relation queries the response was YES. [2024-06-14 11:37:59,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56810 conditions, 7966 events. 4620/7966 cut-off events. For 1216814/1216814 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 58010 event pairs, 1269 based on Foata normal form. 2/7951 useless extension candidates. Maximal degree in co-relation 56642. Up to 7059 conditions per place. [2024-06-14 11:37:59,702 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 336 selfloop transitions, 108 changer transitions 0/452 dead transitions. [2024-06-14 11:37:59,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 452 transitions, 6441 flow [2024-06-14 11:37:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:37:59,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:37:59,704 INFO L175 Difference]: Start difference. First operand has 340 places, 427 transitions, 5491 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:37:59,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 452 transitions, 6441 flow [2024-06-14 11:38:04,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 452 transitions, 6126 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:04,816 INFO L231 Difference]: Finished difference. Result has 343 places, 427 transitions, 5397 flow [2024-06-14 11:38:04,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5397, PETRI_PLACES=343, PETRI_TRANSITIONS=427} [2024-06-14 11:38:04,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 11:38:04,817 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 427 transitions, 5397 flow [2024-06-14 11:38:04,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:04,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:04,817 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] [2024-06-14 11:38:04,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:38:04,818 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:04,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash 912845673, now seen corresponding path program 3 times [2024-06-14 11:38:04,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:04,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133625769] [2024-06-14 11:38:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:04,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:04,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133625769] [2024-06-14 11:38:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133625769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:04,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695370947] [2024-06-14 11:38:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:04,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:04,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:04,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:04,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 427 transitions, 5397 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:04,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:04,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:04,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:06,353 INFO L124 PetriNetUnfolderBase]: 4628/7984 cut-off events. [2024-06-14 11:38:06,354 INFO L125 PetriNetUnfolderBase]: For 1239181/1239181 co-relation queries the response was YES. [2024-06-14 11:38:06,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57117 conditions, 7984 events. 4628/7984 cut-off events. For 1239181/1239181 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 58190 event pairs, 1273 based on Foata normal form. 2/7971 useless extension candidates. Maximal degree in co-relation 56947. Up to 7071 conditions per place. [2024-06-14 11:38:06,473 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 332 selfloop transitions, 108 changer transitions 0/448 dead transitions. [2024-06-14 11:38:06,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 448 transitions, 6429 flow [2024-06-14 11:38:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 11:38:06,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.561046511627907 [2024-06-14 11:38:06,474 INFO L175 Difference]: Start difference. First operand has 343 places, 427 transitions, 5397 flow. Second operand 8 states and 193 transitions. [2024-06-14 11:38:06,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 448 transitions, 6429 flow [2024-06-14 11:38:11,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 448 transitions, 6191 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:38:11,687 INFO L231 Difference]: Finished difference. Result has 344 places, 429 transitions, 5490 flow [2024-06-14 11:38:11,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5490, PETRI_PLACES=344, PETRI_TRANSITIONS=429} [2024-06-14 11:38:11,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 11:38:11,688 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 429 transitions, 5490 flow [2024-06-14 11:38:11,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:11,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:11,688 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] [2024-06-14 11:38:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:38:11,688 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:11,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash 909988713, now seen corresponding path program 4 times [2024-06-14 11:38:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520798812] [2024-06-14 11:38:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:11,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520798812] [2024-06-14 11:38:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520798812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:11,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48674920] [2024-06-14 11:38:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:11,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:11,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 429 transitions, 5490 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:11,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:11,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:11,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:13,279 INFO L124 PetriNetUnfolderBase]: 4636/7992 cut-off events. [2024-06-14 11:38:13,280 INFO L125 PetriNetUnfolderBase]: For 1262108/1262108 co-relation queries the response was YES. [2024-06-14 11:38:13,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57514 conditions, 7992 events. 4636/7992 cut-off events. For 1262108/1262108 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58221 event pairs, 1269 based on Foata normal form. 2/7975 useless extension candidates. Maximal degree in co-relation 57343. Up to 7063 conditions per place. [2024-06-14 11:38:13,381 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 113 changer transitions 0/452 dead transitions. [2024-06-14 11:38:13,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 452 transitions, 6538 flow [2024-06-14 11:38:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:38:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:38:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 11:38:13,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-06-14 11:38:13,382 INFO L175 Difference]: Start difference. First operand has 344 places, 429 transitions, 5490 flow. Second operand 9 states and 213 transitions. [2024-06-14 11:38:13,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 452 transitions, 6538 flow [2024-06-14 11:38:18,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 452 transitions, 6223 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:18,466 INFO L231 Difference]: Finished difference. Result has 347 places, 431 transitions, 5520 flow [2024-06-14 11:38:18,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5175, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5520, PETRI_PLACES=347, PETRI_TRANSITIONS=431} [2024-06-14 11:38:18,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 11:38:18,467 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 431 transitions, 5520 flow [2024-06-14 11:38:18,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:18,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:18,467 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] [2024-06-14 11:38:18,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:38:18,468 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:18,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1681708771, now seen corresponding path program 3 times [2024-06-14 11:38:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:18,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646916769] [2024-06-14 11:38:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:18,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:18,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646916769] [2024-06-14 11:38:18,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646916769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:18,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:18,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:18,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924421447] [2024-06-14 11:38:18,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:18,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:18,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:18,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:18,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:18,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 431 transitions, 5520 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:18,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:18,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:18,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:20,005 INFO L124 PetriNetUnfolderBase]: 4641/7997 cut-off events. [2024-06-14 11:38:20,005 INFO L125 PetriNetUnfolderBase]: For 1272822/1272822 co-relation queries the response was YES. [2024-06-14 11:38:20,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57617 conditions, 7997 events. 4641/7997 cut-off events. For 1272822/1272822 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 58331 event pairs, 1260 based on Foata normal form. 1/7976 useless extension candidates. Maximal degree in co-relation 57445. Up to 6748 conditions per place. [2024-06-14 11:38:20,137 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 290 selfloop transitions, 166 changer transitions 0/464 dead transitions. [2024-06-14 11:38:20,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 464 transitions, 7314 flow [2024-06-14 11:38:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 11:38:20,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133720930232558 [2024-06-14 11:38:20,138 INFO L175 Difference]: Start difference. First operand has 347 places, 431 transitions, 5520 flow. Second operand 8 states and 211 transitions. [2024-06-14 11:38:20,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 464 transitions, 7314 flow [2024-06-14 11:38:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 464 transitions, 6985 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 11:38:25,309 INFO L231 Difference]: Finished difference. Result has 348 places, 434 transitions, 5575 flow [2024-06-14 11:38:25,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5575, PETRI_PLACES=348, PETRI_TRANSITIONS=434} [2024-06-14 11:38:25,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 11:38:25,310 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 434 transitions, 5575 flow [2024-06-14 11:38:25,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:25,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:25,310 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] [2024-06-14 11:38:25,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:38:25,311 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:25,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash 758089005, now seen corresponding path program 4 times [2024-06-14 11:38:25,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:25,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309063051] [2024-06-14 11:38:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:25,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:25,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309063051] [2024-06-14 11:38:25,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309063051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:25,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:25,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:25,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106557258] [2024-06-14 11:38:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:25,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:25,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:25,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:25,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:25,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:25,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 434 transitions, 5575 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:25,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:25,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:25,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:26,887 INFO L124 PetriNetUnfolderBase]: 4654/8005 cut-off events. [2024-06-14 11:38:26,887 INFO L125 PetriNetUnfolderBase]: For 1299056/1299056 co-relation queries the response was YES. [2024-06-14 11:38:26,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58069 conditions, 8005 events. 4654/8005 cut-off events. For 1299056/1299056 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58200 event pairs, 1250 based on Foata normal form. 1/7984 useless extension candidates. Maximal degree in co-relation 57896. Up to 6758 conditions per place. [2024-06-14 11:38:27,008 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 172 changer transitions 0/468 dead transitions. [2024-06-14 11:38:27,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 468 transitions, 7691 flow [2024-06-14 11:38:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 11:38:27,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075581395348837 [2024-06-14 11:38:27,010 INFO L175 Difference]: Start difference. First operand has 348 places, 434 transitions, 5575 flow. Second operand 8 states and 209 transitions. [2024-06-14 11:38:27,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 468 transitions, 7691 flow [2024-06-14 11:38:31,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 468 transitions, 7321 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:31,864 INFO L231 Difference]: Finished difference. Result has 350 places, 440 transitions, 5659 flow [2024-06-14 11:38:31,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5217, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5659, PETRI_PLACES=350, PETRI_TRANSITIONS=440} [2024-06-14 11:38:31,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-14 11:38:31,865 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 440 transitions, 5659 flow [2024-06-14 11:38:31,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:31,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:31,865 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] [2024-06-14 11:38:31,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:38:31,865 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:31,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:31,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1164932725, now seen corresponding path program 5 times [2024-06-14 11:38:31,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:31,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702443852] [2024-06-14 11:38:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:31,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:31,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:31,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702443852] [2024-06-14 11:38:31,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702443852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:31,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:31,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:31,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010359434] [2024-06-14 11:38:31,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:31,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:31,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:31,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:31,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 440 transitions, 5659 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:31,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:31,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:31,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:33,443 INFO L124 PetriNetUnfolderBase]: 4651/8001 cut-off events. [2024-06-14 11:38:33,443 INFO L125 PetriNetUnfolderBase]: For 1310158/1310158 co-relation queries the response was YES. [2024-06-14 11:38:33,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58032 conditions, 8001 events. 4651/8001 cut-off events. For 1310158/1310158 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58235 event pairs, 1250 based on Foata normal form. 1/7980 useless extension candidates. Maximal degree in co-relation 57858. Up to 6756 conditions per place. [2024-06-14 11:38:33,563 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 175 changer transitions 0/470 dead transitions. [2024-06-14 11:38:33,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 470 transitions, 7431 flow [2024-06-14 11:38:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 11:38:33,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133720930232558 [2024-06-14 11:38:33,564 INFO L175 Difference]: Start difference. First operand has 350 places, 440 transitions, 5659 flow. Second operand 8 states and 211 transitions. [2024-06-14 11:38:33,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 470 transitions, 7431 flow [2024-06-14 11:38:38,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 470 transitions, 7135 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:38,432 INFO L231 Difference]: Finished difference. Result has 354 places, 440 transitions, 5719 flow [2024-06-14 11:38:38,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5719, PETRI_PLACES=354, PETRI_TRANSITIONS=440} [2024-06-14 11:38:38,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 11:38:38,432 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 440 transitions, 5719 flow [2024-06-14 11:38:38,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:38,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:38,433 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] [2024-06-14 11:38:38,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:38:38,433 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:38,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 757595381, now seen corresponding path program 6 times [2024-06-14 11:38:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:38,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969873323] [2024-06-14 11:38:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:38,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969873323] [2024-06-14 11:38:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969873323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:38,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235119778] [2024-06-14 11:38:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:38,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:38,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 440 transitions, 5719 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:38,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:38,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:38,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:40,046 INFO L124 PetriNetUnfolderBase]: 4656/8014 cut-off events. [2024-06-14 11:38:40,046 INFO L125 PetriNetUnfolderBase]: For 1330490/1330490 co-relation queries the response was YES. [2024-06-14 11:38:40,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58291 conditions, 8014 events. 4656/8014 cut-off events. For 1330490/1330490 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58287 event pairs, 1252 based on Foata normal form. 1/7993 useless extension candidates. Maximal degree in co-relation 58116. Up to 6760 conditions per place. [2024-06-14 11:38:40,156 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 284 selfloop transitions, 178 changer transitions 0/470 dead transitions. [2024-06-14 11:38:40,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 470 transitions, 7544 flow [2024-06-14 11:38:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 11:38:40,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 11:38:40,157 INFO L175 Difference]: Start difference. First operand has 354 places, 440 transitions, 5719 flow. Second operand 8 states and 208 transitions. [2024-06-14 11:38:40,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 470 transitions, 7544 flow [2024-06-14 11:38:44,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 470 transitions, 7083 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:38:44,820 INFO L231 Difference]: Finished difference. Result has 354 places, 443 transitions, 5675 flow [2024-06-14 11:38:44,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5267, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=354, PETRI_TRANSITIONS=443} [2024-06-14 11:38:44,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 11:38:44,820 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 443 transitions, 5675 flow [2024-06-14 11:38:44,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:44,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:44,821 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] [2024-06-14 11:38:44,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 11:38:44,821 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:44,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1031859445, now seen corresponding path program 7 times [2024-06-14 11:38:44,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:44,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142075648] [2024-06-14 11:38:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:44,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:44,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142075648] [2024-06-14 11:38:44,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142075648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:44,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:44,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:44,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917517620] [2024-06-14 11:38:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:44,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:44,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:44,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:44,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 443 transitions, 5675 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:44,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:44,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:44,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:46,309 INFO L124 PetriNetUnfolderBase]: 4677/8043 cut-off events. [2024-06-14 11:38:46,309 INFO L125 PetriNetUnfolderBase]: For 1366841/1366841 co-relation queries the response was YES. [2024-06-14 11:38:46,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58897 conditions, 8043 events. 4677/8043 cut-off events. For 1366841/1366841 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58549 event pairs, 1250 based on Foata normal form. 1/8022 useless extension candidates. Maximal degree in co-relation 58721. Up to 6776 conditions per place. [2024-06-14 11:38:46,440 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 192 changer transitions 0/473 dead transitions. [2024-06-14 11:38:46,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 473 transitions, 7859 flow [2024-06-14 11:38:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:38:46,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 11:38:46,441 INFO L175 Difference]: Start difference. First operand has 354 places, 443 transitions, 5675 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:38:46,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 473 transitions, 7859 flow [2024-06-14 11:38:51,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 473 transitions, 7551 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:51,587 INFO L231 Difference]: Finished difference. Result has 356 places, 452 transitions, 5913 flow [2024-06-14 11:38:51,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5913, PETRI_PLACES=356, PETRI_TRANSITIONS=452} [2024-06-14 11:38:51,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-14 11:38:51,587 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 452 transitions, 5913 flow [2024-06-14 11:38:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:51,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:51,588 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] [2024-06-14 11:38:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 11:38:51,588 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:51,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash -872574581, now seen corresponding path program 8 times [2024-06-14 11:38:51,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:51,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667975743] [2024-06-14 11:38:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:51,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:51,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667975743] [2024-06-14 11:38:51,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667975743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:51,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:51,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:51,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326929510] [2024-06-14 11:38:51,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:51,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:51,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:51,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:51,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:51,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:51,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 452 transitions, 5913 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:51,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:51,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:51,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:53,077 INFO L124 PetriNetUnfolderBase]: 4690/8069 cut-off events. [2024-06-14 11:38:53,078 INFO L125 PetriNetUnfolderBase]: For 1396785/1396785 co-relation queries the response was YES. [2024-06-14 11:38:53,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59364 conditions, 8069 events. 4690/8069 cut-off events. For 1396785/1396785 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58741 event pairs, 1252 based on Foata normal form. 1/8048 useless extension candidates. Maximal degree in co-relation 59187. Up to 6786 conditions per place. [2024-06-14 11:38:53,215 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 198 changer transitions 0/479 dead transitions. [2024-06-14 11:38:53,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 479 transitions, 8071 flow [2024-06-14 11:38:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:38:53,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-14 11:38:53,217 INFO L175 Difference]: Start difference. First operand has 356 places, 452 transitions, 5913 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:38:53,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 479 transitions, 8071 flow [2024-06-14 11:38:59,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 479 transitions, 7787 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-14 11:38:59,139 INFO L231 Difference]: Finished difference. Result has 361 places, 458 transitions, 6141 flow [2024-06-14 11:38:59,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6141, PETRI_PLACES=361, PETRI_TRANSITIONS=458} [2024-06-14 11:38:59,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-14 11:38:59,140 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 458 transitions, 6141 flow [2024-06-14 11:38:59,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:59,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:59,140 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] [2024-06-14 11:38:59,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 11:38:59,141 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:59,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash -400122281, now seen corresponding path program 9 times [2024-06-14 11:38:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:59,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75969219] [2024-06-14 11:38:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:59,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75969219] [2024-06-14 11:38:59,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75969219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:59,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:59,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:59,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733915696] [2024-06-14 11:38:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:59,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:59,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:59,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:38:59,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 458 transitions, 6141 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:59,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:59,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:38:59,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:00,627 INFO L124 PetriNetUnfolderBase]: 4695/8078 cut-off events. [2024-06-14 11:39:00,627 INFO L125 PetriNetUnfolderBase]: For 1418112/1418112 co-relation queries the response was YES. [2024-06-14 11:39:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59602 conditions, 8078 events. 4695/8078 cut-off events. For 1418112/1418112 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 58838 event pairs, 1281 based on Foata normal form. 1/8057 useless extension candidates. Maximal degree in co-relation 59424. Up to 6790 conditions per place. [2024-06-14 11:39:00,747 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 274 selfloop transitions, 201 changer transitions 0/483 dead transitions. [2024-06-14 11:39:00,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 483 transitions, 8257 flow [2024-06-14 11:39:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:39:00,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843023255813954 [2024-06-14 11:39:00,748 INFO L175 Difference]: Start difference. First operand has 361 places, 458 transitions, 6141 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:39:00,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 483 transitions, 8257 flow [2024-06-14 11:39:07,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 483 transitions, 8014 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 11:39:07,429 INFO L231 Difference]: Finished difference. Result has 367 places, 461 transitions, 6356 flow [2024-06-14 11:39:07,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6356, PETRI_PLACES=367, PETRI_TRANSITIONS=461} [2024-06-14 11:39:07,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-14 11:39:07,430 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 461 transitions, 6356 flow [2024-06-14 11:39:07,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:07,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:07,430 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] [2024-06-14 11:39:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 11:39:07,430 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:07,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1059962511, now seen corresponding path program 1 times [2024-06-14 11:39:07,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:07,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392165252] [2024-06-14 11:39:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:07,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:07,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392165252] [2024-06-14 11:39:07,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392165252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:07,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:07,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:07,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809317493] [2024-06-14 11:39:07,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:07,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:07,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:07,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:07,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:07,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:39:07,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 461 transitions, 6356 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:07,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:07,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:39:07,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:09,458 INFO L124 PetriNetUnfolderBase]: 4716/8099 cut-off events. [2024-06-14 11:39:09,458 INFO L125 PetriNetUnfolderBase]: For 1469764/1469764 co-relation queries the response was YES. [2024-06-14 11:39:09,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60528 conditions, 8099 events. 4716/8099 cut-off events. For 1469764/1469764 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 58935 event pairs, 1243 based on Foata normal form. 2/8082 useless extension candidates. Maximal degree in co-relation 60349. Up to 7151 conditions per place. [2024-06-14 11:39:09,572 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 390 selfloop transitions, 98 changer transitions 2/498 dead transitions. [2024-06-14 11:39:09,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 498 transitions, 7846 flow [2024-06-14 11:39:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:39:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:39:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 11:39:09,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:39:09,574 INFO L175 Difference]: Start difference. First operand has 367 places, 461 transitions, 6356 flow. Second operand 9 states and 225 transitions. [2024-06-14 11:39:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 498 transitions, 7846 flow [2024-06-14 11:39:16,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 498 transitions, 7330 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:39:16,575 INFO L231 Difference]: Finished difference. Result has 370 places, 465 transitions, 6210 flow [2024-06-14 11:39:16,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6210, PETRI_PLACES=370, PETRI_TRANSITIONS=465} [2024-06-14 11:39:16,575 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 11:39:16,576 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 465 transitions, 6210 flow [2024-06-14 11:39:16,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:16,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:16,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:16,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 11:39:16,576 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:16,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash 754807799, now seen corresponding path program 2 times [2024-06-14 11:39:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:16,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861826331] [2024-06-14 11:39:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:16,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:16,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861826331] [2024-06-14 11:39:16,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861826331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:16,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:16,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:16,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578853431] [2024-06-14 11:39:16,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:16,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:16,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:16,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:39:16,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 465 transitions, 6210 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:16,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:16,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:39:16,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:18,548 INFO L124 PetriNetUnfolderBase]: 4711/8110 cut-off events. [2024-06-14 11:39:18,548 INFO L125 PetriNetUnfolderBase]: For 1470085/1470085 co-relation queries the response was YES. [2024-06-14 11:39:18,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60120 conditions, 8110 events. 4711/8110 cut-off events. For 1470085/1470085 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59201 event pairs, 1268 based on Foata normal form. 2/8098 useless extension candidates. Maximal degree in co-relation 59939. Up to 7201 conditions per place. [2024-06-14 11:39:18,667 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 389 selfloop transitions, 93 changer transitions 0/490 dead transitions. [2024-06-14 11:39:18,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 490 transitions, 7236 flow [2024-06-14 11:39:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:39:18,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-14 11:39:18,668 INFO L175 Difference]: Start difference. First operand has 370 places, 465 transitions, 6210 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:39:18,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 490 transitions, 7236 flow [2024-06-14 11:39:25,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 490 transitions, 6934 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:25,697 INFO L231 Difference]: Finished difference. Result has 372 places, 465 transitions, 6099 flow [2024-06-14 11:39:25,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5908, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6099, PETRI_PLACES=372, PETRI_TRANSITIONS=465} [2024-06-14 11:39:25,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-14 11:39:25,698 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 465 transitions, 6099 flow [2024-06-14 11:39:25,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:25,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:25,698 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] [2024-06-14 11:39:25,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 11:39:25,698 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:25,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1038204787, now seen corresponding path program 3 times [2024-06-14 11:39:25,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:25,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730745054] [2024-06-14 11:39:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:25,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:25,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:25,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730745054] [2024-06-14 11:39:25,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730745054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:25,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:25,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64913982] [2024-06-14 11:39:25,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:25,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:39:25,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 465 transitions, 6099 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:25,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:25,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:39:25,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:27,657 INFO L124 PetriNetUnfolderBase]: 4719/8118 cut-off events. [2024-06-14 11:39:27,657 INFO L125 PetriNetUnfolderBase]: For 1490096/1490096 co-relation queries the response was YES. [2024-06-14 11:39:27,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60195 conditions, 8118 events. 4719/8118 cut-off events. For 1490096/1490096 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 59201 event pairs, 1266 based on Foata normal form. 2/8106 useless extension candidates. Maximal degree in co-relation 60013. Up to 7213 conditions per place. [2024-06-14 11:39:27,775 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 382 selfloop transitions, 95 changer transitions 0/485 dead transitions. [2024-06-14 11:39:27,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 485 transitions, 7176 flow [2024-06-14 11:39:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:39:27,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574750830564784 [2024-06-14 11:39:27,776 INFO L175 Difference]: Start difference. First operand has 372 places, 465 transitions, 6099 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:39:27,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 485 transitions, 7176 flow [2024-06-14 11:39:34,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 485 transitions, 6970 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:39:34,692 INFO L231 Difference]: Finished difference. Result has 372 places, 467 transitions, 6171 flow [2024-06-14 11:39:34,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6171, PETRI_PLACES=372, PETRI_TRANSITIONS=467} [2024-06-14 11:39:34,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-14 11:39:34,692 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 467 transitions, 6171 flow [2024-06-14 11:39:34,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:34,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:34,693 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] [2024-06-14 11:39:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 11:39:34,693 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:34,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1381324821, now seen corresponding path program 5 times [2024-06-14 11:39:34,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:34,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166022171] [2024-06-14 11:39:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:34,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:34,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166022171] [2024-06-14 11:39:34,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166022171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:34,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:34,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:34,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327337395] [2024-06-14 11:39:34,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:34,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:34,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:34,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:39:34,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 467 transitions, 6171 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:34,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:34,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:39:34,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:36,539 INFO L124 PetriNetUnfolderBase]: 4727/8125 cut-off events. [2024-06-14 11:39:36,540 INFO L125 PetriNetUnfolderBase]: For 1514364/1514364 co-relation queries the response was YES. [2024-06-14 11:39:36,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60583 conditions, 8125 events. 4727/8125 cut-off events. For 1514364/1514364 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59344 event pairs, 1258 based on Foata normal form. 2/8112 useless extension candidates. Maximal degree in co-relation 60400. Up to 7156 conditions per place. [2024-06-14 11:39:36,654 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 383 selfloop transitions, 108 changer transitions 2/501 dead transitions. [2024-06-14 11:39:36,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 501 transitions, 7737 flow [2024-06-14 11:39:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:39:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:39:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 11:39:36,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-14 11:39:36,655 INFO L175 Difference]: Start difference. First operand has 372 places, 467 transitions, 6171 flow. Second operand 9 states and 222 transitions. [2024-06-14 11:39:36,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 501 transitions, 7737 flow [2024-06-14 11:39:43,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 501 transitions, 7482 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:43,086 INFO L231 Difference]: Finished difference. Result has 377 places, 471 transitions, 6376 flow [2024-06-14 11:39:43,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5916, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6376, PETRI_PLACES=377, PETRI_TRANSITIONS=471} [2024-06-14 11:39:43,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-14 11:39:43,087 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 471 transitions, 6376 flow [2024-06-14 11:39:43,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:43,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:43,087 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] [2024-06-14 11:39:43,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 11:39:43,088 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:43,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash 406658603, now seen corresponding path program 6 times [2024-06-14 11:39:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:43,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435303251] [2024-06-14 11:39:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435303251] [2024-06-14 11:39:43,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435303251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:43,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:43,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227546738] [2024-06-14 11:39:43,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:43,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:43,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:43,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:39:43,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 471 transitions, 6376 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:43,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:43,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:39:43,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:45,097 INFO L124 PetriNetUnfolderBase]: 4722/8127 cut-off events. [2024-06-14 11:39:45,097 INFO L125 PetriNetUnfolderBase]: For 1516707/1516707 co-relation queries the response was YES. [2024-06-14 11:39:45,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60400 conditions, 8127 events. 4722/8127 cut-off events. For 1516707/1516707 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59338 event pairs, 1276 based on Foata normal form. 2/8123 useless extension candidates. Maximal degree in co-relation 60215. Up to 7206 conditions per place. [2024-06-14 11:39:45,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 382 selfloop transitions, 103 changer transitions 0/493 dead transitions. [2024-06-14 11:39:45,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 493 transitions, 7400 flow [2024-06-14 11:39:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:39:45,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 11:39:45,230 INFO L175 Difference]: Start difference. First operand has 377 places, 471 transitions, 6376 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:39:45,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 493 transitions, 7400 flow [2024-06-14 11:39:52,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 493 transitions, 7075 flow, removed 99 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:52,514 INFO L231 Difference]: Finished difference. Result has 380 places, 471 transitions, 6262 flow [2024-06-14 11:39:52,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6262, PETRI_PLACES=380, PETRI_TRANSITIONS=471} [2024-06-14 11:39:52,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 11:39:52,515 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 471 transitions, 6262 flow [2024-06-14 11:39:52,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:52,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:52,515 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] [2024-06-14 11:39:52,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 11:39:52,516 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:52,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1781775989, now seen corresponding path program 10 times [2024-06-14 11:39:52,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:52,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803651729] [2024-06-14 11:39:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:52,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:52,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803651729] [2024-06-14 11:39:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803651729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:52,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:52,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892771313] [2024-06-14 11:39:52,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:52,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:52,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:39:52,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 471 transitions, 6262 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:52,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:52,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:39:52,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:54,298 INFO L124 PetriNetUnfolderBase]: 4727/8134 cut-off events. [2024-06-14 11:39:54,298 INFO L125 PetriNetUnfolderBase]: For 1523130/1523130 co-relation queries the response was YES. [2024-06-14 11:39:54,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60490 conditions, 8134 events. 4727/8134 cut-off events. For 1523130/1523130 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59360 event pairs, 1304 based on Foata normal form. 1/8129 useless extension candidates. Maximal degree in co-relation 60303. Up to 6835 conditions per place. [2024-06-14 11:39:54,558 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 326 selfloop transitions, 166 changer transitions 0/500 dead transitions. [2024-06-14 11:39:54,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 500 transitions, 7919 flow [2024-06-14 11:39:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:39:54,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017441860465116 [2024-06-14 11:39:54,574 INFO L175 Difference]: Start difference. First operand has 380 places, 471 transitions, 6262 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:39:54,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 500 transitions, 7919 flow [2024-06-14 11:40:01,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 500 transitions, 7691 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:40:01,472 INFO L231 Difference]: Finished difference. Result has 381 places, 474 transitions, 6427 flow [2024-06-14 11:40:01,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6427, PETRI_PLACES=381, PETRI_TRANSITIONS=474} [2024-06-14 11:40:01,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-14 11:40:01,473 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 474 transitions, 6427 flow [2024-06-14 11:40:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:01,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:01,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:01,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 11:40:01,474 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:01,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1506798927, now seen corresponding path program 11 times [2024-06-14 11:40:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:01,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914812326] [2024-06-14 11:40:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:01,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:01,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:01,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914812326] [2024-06-14 11:40:01,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914812326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:01,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:01,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:01,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186226948] [2024-06-14 11:40:01,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:01,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:01,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:40:01,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 474 transitions, 6427 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:01,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:01,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:40:01,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:03,370 INFO L124 PetriNetUnfolderBase]: 4740/8154 cut-off events. [2024-06-14 11:40:03,370 INFO L125 PetriNetUnfolderBase]: For 1555648/1555648 co-relation queries the response was YES. [2024-06-14 11:40:03,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61135 conditions, 8154 events. 4740/8154 cut-off events. For 1555648/1555648 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59499 event pairs, 1303 based on Foata normal form. 1/8149 useless extension candidates. Maximal degree in co-relation 60947. Up to 6845 conditions per place. [2024-06-14 11:40:03,481 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 323 selfloop transitions, 173 changer transitions 0/504 dead transitions. [2024-06-14 11:40:03,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 504 transitions, 8419 flow [2024-06-14 11:40:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 11:40:03,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-14 11:40:03,482 INFO L175 Difference]: Start difference. First operand has 381 places, 474 transitions, 6427 flow. Second operand 8 states and 205 transitions. [2024-06-14 11:40:03,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 504 transitions, 8419 flow [2024-06-14 11:40:09,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 504 transitions, 8156 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:09,588 INFO L231 Difference]: Finished difference. Result has 385 places, 480 transitions, 6634 flow [2024-06-14 11:40:09,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6634, PETRI_PLACES=385, PETRI_TRANSITIONS=480} [2024-06-14 11:40:09,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 11:40:09,589 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 480 transitions, 6634 flow [2024-06-14 11:40:09,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:09,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:09,589 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] [2024-06-14 11:40:09,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 11:40:09,590 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:09,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1692682559, now seen corresponding path program 12 times [2024-06-14 11:40:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859222859] [2024-06-14 11:40:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:09,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:09,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:09,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859222859] [2024-06-14 11:40:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859222859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:09,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:09,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:09,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051162744] [2024-06-14 11:40:09,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:09,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:09,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:09,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:40:09,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 480 transitions, 6634 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:09,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:09,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:40:09,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:11,536 INFO L124 PetriNetUnfolderBase]: 4737/8154 cut-off events. [2024-06-14 11:40:11,536 INFO L125 PetriNetUnfolderBase]: For 1568690/1568690 co-relation queries the response was YES. [2024-06-14 11:40:11,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61160 conditions, 8154 events. 4737/8154 cut-off events. For 1568690/1568690 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59614 event pairs, 1308 based on Foata normal form. 1/8149 useless extension candidates. Maximal degree in co-relation 60969. Up to 6843 conditions per place. [2024-06-14 11:40:11,653 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 327 selfloop transitions, 171 changer transitions 0/506 dead transitions. [2024-06-14 11:40:11,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 506 transitions, 8258 flow [2024-06-14 11:40:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:40:11,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-14 11:40:11,654 INFO L175 Difference]: Start difference. First operand has 385 places, 480 transitions, 6634 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:40:11,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 506 transitions, 8258 flow [2024-06-14 11:40:18,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 506 transitions, 7991 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 11:40:18,538 INFO L231 Difference]: Finished difference. Result has 389 places, 480 transitions, 6715 flow [2024-06-14 11:40:18,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6367, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6715, PETRI_PLACES=389, PETRI_TRANSITIONS=480} [2024-06-14 11:40:18,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 11:40:18,539 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 480 transitions, 6715 flow [2024-06-14 11:40:18,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:18,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:18,539 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] [2024-06-14 11:40:18,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 11:40:18,540 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:18,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1104461207, now seen corresponding path program 13 times [2024-06-14 11:40:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:18,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363928697] [2024-06-14 11:40:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:18,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:18,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:18,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363928697] [2024-06-14 11:40:18,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363928697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:18,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:18,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:18,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018011589] [2024-06-14 11:40:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:18,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:18,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:18,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:40:18,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 480 transitions, 6715 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:18,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:18,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:40:18,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:20,315 INFO L124 PetriNetUnfolderBase]: 4734/8150 cut-off events. [2024-06-14 11:40:20,316 INFO L125 PetriNetUnfolderBase]: For 1581223/1581223 co-relation queries the response was YES. [2024-06-14 11:40:20,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61170 conditions, 8150 events. 4734/8150 cut-off events. For 1581223/1581223 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59598 event pairs, 1304 based on Foata normal form. 1/8145 useless extension candidates. Maximal degree in co-relation 60977. Up to 6841 conditions per place. [2024-06-14 11:40:20,435 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 175 changer transitions 0/504 dead transitions. [2024-06-14 11:40:20,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 504 transitions, 8617 flow [2024-06-14 11:40:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 11:40:20,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 11:40:20,592 INFO L175 Difference]: Start difference. First operand has 389 places, 480 transitions, 6715 flow. Second operand 8 states and 204 transitions. [2024-06-14 11:40:20,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 504 transitions, 8617 flow [2024-06-14 11:40:27,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 504 transitions, 8158 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:40:27,829 INFO L231 Difference]: Finished difference. Result has 389 places, 480 transitions, 6612 flow [2024-06-14 11:40:27,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6256, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6612, PETRI_PLACES=389, PETRI_TRANSITIONS=480} [2024-06-14 11:40:27,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 11:40:27,830 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 480 transitions, 6612 flow [2024-06-14 11:40:27,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:27,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:27,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:27,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 11:40:27,830 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:27,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash 181548737, now seen corresponding path program 14 times [2024-06-14 11:40:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:27,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159664819] [2024-06-14 11:40:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:27,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159664819] [2024-06-14 11:40:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159664819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796592406] [2024-06-14 11:40:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:27,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:27,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:40:27,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 480 transitions, 6612 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:27,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:27,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:40:27,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:29,740 INFO L124 PetriNetUnfolderBase]: 4731/8142 cut-off events. [2024-06-14 11:40:29,740 INFO L125 PetriNetUnfolderBase]: For 1590968/1590968 co-relation queries the response was YES. [2024-06-14 11:40:29,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61099 conditions, 8142 events. 4731/8142 cut-off events. For 1590968/1590968 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59518 event pairs, 1306 based on Foata normal form. 1/8137 useless extension candidates. Maximal degree in co-relation 60906. Up to 6839 conditions per place. [2024-06-14 11:40:29,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 320 selfloop transitions, 178 changer transitions 0/506 dead transitions. [2024-06-14 11:40:29,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 506 transitions, 8244 flow [2024-06-14 11:40:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 11:40:29,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-14 11:40:29,854 INFO L175 Difference]: Start difference. First operand has 389 places, 480 transitions, 6612 flow. Second operand 8 states and 205 transitions. [2024-06-14 11:40:29,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 506 transitions, 8244 flow [2024-06-14 11:40:37,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 506 transitions, 7890 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:37,562 INFO L231 Difference]: Finished difference. Result has 391 places, 480 transitions, 6620 flow [2024-06-14 11:40:37,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6258, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6620, PETRI_PLACES=391, PETRI_TRANSITIONS=480} [2024-06-14 11:40:37,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-14 11:40:37,563 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 480 transitions, 6620 flow [2024-06-14 11:40:37,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:37,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:37,563 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] [2024-06-14 11:40:37,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 11:40:37,564 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:37,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 410093541, now seen corresponding path program 15 times [2024-06-14 11:40:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:37,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031185102] [2024-06-14 11:40:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:37,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:37,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031185102] [2024-06-14 11:40:37,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031185102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:37,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:37,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144882810] [2024-06-14 11:40:37,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:37,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:40:37,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 480 transitions, 6620 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:37,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:37,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:40:37,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:39,472 INFO L124 PetriNetUnfolderBase]: 4752/8181 cut-off events. [2024-06-14 11:40:39,473 INFO L125 PetriNetUnfolderBase]: For 1634563/1634563 co-relation queries the response was YES. [2024-06-14 11:40:39,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61811 conditions, 8181 events. 4752/8181 cut-off events. For 1634563/1634563 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59885 event pairs, 1293 based on Foata normal form. 1/8176 useless extension candidates. Maximal degree in co-relation 61616. Up to 6861 conditions per place. [2024-06-14 11:40:39,582 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 316 selfloop transitions, 190 changer transitions 0/514 dead transitions. [2024-06-14 11:40:39,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 514 transitions, 8982 flow [2024-06-14 11:40:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:40:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:40:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-14 11:40:39,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767441860465117 [2024-06-14 11:40:39,583 INFO L175 Difference]: Start difference. First operand has 391 places, 480 transitions, 6620 flow. Second operand 10 states and 248 transitions. [2024-06-14 11:40:39,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 514 transitions, 8982 flow [2024-06-14 11:40:47,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 514 transitions, 8576 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 11:40:47,770 INFO L231 Difference]: Finished difference. Result has 394 places, 487 transitions, 6745 flow [2024-06-14 11:40:47,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6226, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6745, PETRI_PLACES=394, PETRI_TRANSITIONS=487} [2024-06-14 11:40:47,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-14 11:40:47,771 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 487 transitions, 6745 flow [2024-06-14 11:40:47,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:47,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:47,771 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] [2024-06-14 11:40:47,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 11:40:47,771 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:47,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2079794805, now seen corresponding path program 16 times [2024-06-14 11:40:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:47,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052081693] [2024-06-14 11:40:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:47,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:47,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052081693] [2024-06-14 11:40:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052081693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:47,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:47,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957224040] [2024-06-14 11:40:47,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:47,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:47,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:47,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:40:47,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 487 transitions, 6745 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:47,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:47,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:40:47,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:49,583 INFO L124 PetriNetUnfolderBase]: 4746/8181 cut-off events. [2024-06-14 11:40:49,583 INFO L125 PetriNetUnfolderBase]: For 1645172/1645172 co-relation queries the response was YES. [2024-06-14 11:40:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61616 conditions, 8181 events. 4746/8181 cut-off events. For 1645172/1645172 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59865 event pairs, 1301 based on Foata normal form. 2/8177 useless extension candidates. Maximal degree in co-relation 61420. Up to 6856 conditions per place. [2024-06-14 11:40:49,704 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 316 selfloop transitions, 184 changer transitions 0/508 dead transitions. [2024-06-14 11:40:49,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 508 transitions, 8665 flow [2024-06-14 11:40:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:40:49,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-14 11:40:49,705 INFO L175 Difference]: Start difference. First operand has 394 places, 487 transitions, 6745 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:40:49,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 508 transitions, 8665 flow [2024-06-14 11:40:58,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 508 transitions, 8273 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 11:40:58,939 INFO L231 Difference]: Finished difference. Result has 395 places, 487 transitions, 6728 flow [2024-06-14 11:40:58,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6728, PETRI_PLACES=395, PETRI_TRANSITIONS=487} [2024-06-14 11:40:58,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 11:40:58,939 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 487 transitions, 6728 flow [2024-06-14 11:40:58,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:58,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:58,939 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] [2024-06-14 11:40:58,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 11:40:58,940 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:58,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash 462265031, now seen corresponding path program 17 times [2024-06-14 11:40:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:58,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551090090] [2024-06-14 11:40:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:58,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:59,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551090090] [2024-06-14 11:40:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551090090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:59,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533308691] [2024-06-14 11:40:59,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:59,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:59,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:59,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:40:59,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 487 transitions, 6728 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:59,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:59,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:40:59,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:00,801 INFO L124 PetriNetUnfolderBase]: 4756/8156 cut-off events. [2024-06-14 11:41:00,801 INFO L125 PetriNetUnfolderBase]: For 1669752/1669752 co-relation queries the response was YES. [2024-06-14 11:41:00,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61800 conditions, 8156 events. 4756/8156 cut-off events. For 1669752/1669752 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59523 event pairs, 1368 based on Foata normal form. 2/8129 useless extension candidates. Maximal degree in co-relation 61602. Up to 6866 conditions per place. [2024-06-14 11:41:00,915 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 313 selfloop transitions, 184 changer transitions 0/505 dead transitions. [2024-06-14 11:41:00,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 505 transitions, 8715 flow [2024-06-14 11:41:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:41:00,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 11:41:00,916 INFO L175 Difference]: Start difference. First operand has 395 places, 487 transitions, 6728 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:41:00,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 505 transitions, 8715 flow [2024-06-14 11:41:10,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 505 transitions, 8331 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:41:10,142 INFO L231 Difference]: Finished difference. Result has 395 places, 491 transitions, 6804 flow [2024-06-14 11:41:10,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6804, PETRI_PLACES=395, PETRI_TRANSITIONS=491} [2024-06-14 11:41:10,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 11:41:10,143 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 491 transitions, 6804 flow [2024-06-14 11:41:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:10,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:10,143 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] [2024-06-14 11:41:10,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 11:41:10,143 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:10,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1034493403, now seen corresponding path program 18 times [2024-06-14 11:41:10,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:10,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715611075] [2024-06-14 11:41:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:10,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:10,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:10,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715611075] [2024-06-14 11:41:10,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715611075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:10,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:10,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:41:10,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595281368] [2024-06-14 11:41:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:10,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:41:10,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:41:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:41:10,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:41:10,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 491 transitions, 6804 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:10,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:10,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:41:10,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:11,945 INFO L124 PetriNetUnfolderBase]: 4766/8166 cut-off events. [2024-06-14 11:41:11,946 INFO L125 PetriNetUnfolderBase]: For 1692543/1692543 co-relation queries the response was YES. [2024-06-14 11:41:12,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62038 conditions, 8166 events. 4766/8166 cut-off events. For 1692543/1692543 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59608 event pairs, 1360 based on Foata normal form. 2/8139 useless extension candidates. Maximal degree in co-relation 61839. Up to 6876 conditions per place. [2024-06-14 11:41:12,277 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 186 changer transitions 0/509 dead transitions. [2024-06-14 11:41:12,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 509 transitions, 8807 flow [2024-06-14 11:41:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:41:12,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 11:41:12,278 INFO L175 Difference]: Start difference. First operand has 395 places, 491 transitions, 6804 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:41:12,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 509 transitions, 8807 flow [2024-06-14 11:41:20,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 509 transitions, 8140 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:20,641 INFO L231 Difference]: Finished difference. Result has 396 places, 495 transitions, 6603 flow [2024-06-14 11:41:20,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6171, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6603, PETRI_PLACES=396, PETRI_TRANSITIONS=495} [2024-06-14 11:41:20,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-14 11:41:20,642 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 495 transitions, 6603 flow [2024-06-14 11:41:20,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:20,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:20,642 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] [2024-06-14 11:41:20,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 11:41:20,643 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:20,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1086625955, now seen corresponding path program 19 times [2024-06-14 11:41:20,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:20,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131326688] [2024-06-14 11:41:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:20,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:20,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131326688] [2024-06-14 11:41:20,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131326688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:20,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:20,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:41:20,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262788287] [2024-06-14 11:41:20,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:41:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:41:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:41:20,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:41:20,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 495 transitions, 6603 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:20,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:20,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:41:20,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:22,442 INFO L124 PetriNetUnfolderBase]: 4760/8158 cut-off events. [2024-06-14 11:41:22,442 INFO L125 PetriNetUnfolderBase]: For 1688622/1688622 co-relation queries the response was YES. [2024-06-14 11:41:22,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61680 conditions, 8158 events. 4760/8158 cut-off events. For 1688622/1688622 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59545 event pairs, 1360 based on Foata normal form. 2/8131 useless extension candidates. Maximal degree in co-relation 61481. Up to 6871 conditions per place. [2024-06-14 11:41:22,560 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 186 changer transitions 0/509 dead transitions. [2024-06-14 11:41:22,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 509 transitions, 8525 flow [2024-06-14 11:41:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:41:22,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:41:22,561 INFO L175 Difference]: Start difference. First operand has 396 places, 495 transitions, 6603 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:41:22,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 509 transitions, 8525 flow [2024-06-14 11:41:30,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 509 transitions, 8168 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:41:30,510 INFO L231 Difference]: Finished difference. Result has 399 places, 495 transitions, 6625 flow [2024-06-14 11:41:30,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6246, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6625, PETRI_PLACES=399, PETRI_TRANSITIONS=495} [2024-06-14 11:41:30,510 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-14 11:41:30,510 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 495 transitions, 6625 flow [2024-06-14 11:41:30,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:30,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:30,511 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] [2024-06-14 11:41:30,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 11:41:30,511 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:30,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash -717425293, now seen corresponding path program 7 times [2024-06-14 11:41:30,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:30,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239579627] [2024-06-14 11:41:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:30,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:30,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:30,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239579627] [2024-06-14 11:41:30,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239579627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:30,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:30,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:30,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201220088] [2024-06-14 11:41:30,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:30,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:30,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:30,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:41:30,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 495 transitions, 6625 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:30,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:30,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:41:30,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:32,331 INFO L124 PetriNetUnfolderBase]: 4796/8238 cut-off events. [2024-06-14 11:41:32,332 INFO L125 PetriNetUnfolderBase]: For 1806593/1806593 co-relation queries the response was YES. [2024-06-14 11:41:32,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62590 conditions, 8238 events. 4796/8238 cut-off events. For 1806593/1806593 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60312 event pairs, 1303 based on Foata normal form. 10/8234 useless extension candidates. Maximal degree in co-relation 62390. Up to 7284 conditions per place. [2024-06-14 11:41:32,635 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 403 selfloop transitions, 102 changer transitions 0/513 dead transitions. [2024-06-14 11:41:32,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 513 transitions, 7803 flow [2024-06-14 11:41:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:41:32,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 11:41:32,637 INFO L175 Difference]: Start difference. First operand has 399 places, 495 transitions, 6625 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:41:32,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 513 transitions, 7803 flow [2024-06-14 11:41:40,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 513 transitions, 7338 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 11:41:40,869 INFO L231 Difference]: Finished difference. Result has 399 places, 497 transitions, 6492 flow [2024-06-14 11:41:40,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6492, PETRI_PLACES=399, PETRI_TRANSITIONS=497} [2024-06-14 11:41:40,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-14 11:41:40,869 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 497 transitions, 6492 flow [2024-06-14 11:41:40,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:40,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:40,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:40,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 11:41:40,870 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:40,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:40,870 INFO L85 PathProgramCache]: Analyzing trace with hash -672223701, now seen corresponding path program 8 times [2024-06-14 11:41:40,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:40,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228645503] [2024-06-14 11:41:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:40,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:40,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:40,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228645503] [2024-06-14 11:41:40,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228645503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:40,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:40,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210987019] [2024-06-14 11:41:40,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:40,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:40,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:40,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:41,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:41:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 497 transitions, 6492 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:41:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:42,848 INFO L124 PetriNetUnfolderBase]: 4819/8299 cut-off events. [2024-06-14 11:41:42,849 INFO L125 PetriNetUnfolderBase]: For 1808029/1808029 co-relation queries the response was YES. [2024-06-14 11:41:42,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62611 conditions, 8299 events. 4819/8299 cut-off events. For 1808029/1808029 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 61069 event pairs, 1308 based on Foata normal form. 10/8295 useless extension candidates. Maximal degree in co-relation 62412. Up to 7193 conditions per place. [2024-06-14 11:41:42,972 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 405 selfloop transitions, 107 changer transitions 0/520 dead transitions. [2024-06-14 11:41:42,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 520 transitions, 7712 flow [2024-06-14 11:41:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:41:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:41:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 11:41:42,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 11:41:42,974 INFO L175 Difference]: Start difference. First operand has 399 places, 497 transitions, 6492 flow. Second operand 9 states and 215 transitions. [2024-06-14 11:41:42,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 520 transitions, 7712 flow [2024-06-14 11:41:51,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 520 transitions, 7410 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:51,522 INFO L231 Difference]: Finished difference. Result has 402 places, 499 transitions, 6535 flow [2024-06-14 11:41:51,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6190, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6535, PETRI_PLACES=402, PETRI_TRANSITIONS=499} [2024-06-14 11:41:51,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 11:41:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 499 transitions, 6535 flow [2024-06-14 11:41:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:51,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:51,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 11:41:51,523 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:51,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash -669361781, now seen corresponding path program 20 times [2024-06-14 11:41:51,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587799911] [2024-06-14 11:41:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:51,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587799911] [2024-06-14 11:41:51,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587799911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:51,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:51,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:51,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655045101] [2024-06-14 11:41:51,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:51,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:51,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:51,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:51,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:51,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:41:51,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 499 transitions, 6535 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:51,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:51,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:41:51,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:53,430 INFO L124 PetriNetUnfolderBase]: 4813/8275 cut-off events. [2024-06-14 11:41:53,431 INFO L125 PetriNetUnfolderBase]: For 1714098/1714098 co-relation queries the response was YES. [2024-06-14 11:41:53,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61999 conditions, 8275 events. 4813/8275 cut-off events. For 1714098/1714098 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60794 event pairs, 1385 based on Foata normal form. 2/8250 useless extension candidates. Maximal degree in co-relation 61799. Up to 6959 conditions per place. [2024-06-14 11:41:53,547 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 190 changer transitions 0/513 dead transitions. [2024-06-14 11:41:53,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 513 transitions, 8181 flow [2024-06-14 11:41:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:41:53,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 11:41:53,549 INFO L175 Difference]: Start difference. First operand has 402 places, 499 transitions, 6535 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:41:53,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 513 transitions, 8181 flow [2024-06-14 11:42:02,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 513 transitions, 7858 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 11:42:02,970 INFO L231 Difference]: Finished difference. Result has 403 places, 499 transitions, 6599 flow [2024-06-14 11:42:02,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6599, PETRI_PLACES=403, PETRI_TRANSITIONS=499} [2024-06-14 11:42:02,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-14 11:42:02,971 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 499 transitions, 6599 flow [2024-06-14 11:42:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:02,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:02,971 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] [2024-06-14 11:42:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 11:42:02,971 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:02,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1751016367, now seen corresponding path program 4 times [2024-06-14 11:42:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349104035] [2024-06-14 11:42:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:03,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349104035] [2024-06-14 11:42:03,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349104035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:03,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:03,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:03,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621098100] [2024-06-14 11:42:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:03,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:03,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:03,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:42:03,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 499 transitions, 6599 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:03,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:03,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:42:03,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:04,909 INFO L124 PetriNetUnfolderBase]: 4834/8340 cut-off events. [2024-06-14 11:42:04,910 INFO L125 PetriNetUnfolderBase]: For 1753570/1753570 co-relation queries the response was YES. [2024-06-14 11:42:05,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62592 conditions, 8340 events. 4834/8340 cut-off events. For 1753570/1753570 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61382 event pairs, 1281 based on Foata normal form. 2/8337 useless extension candidates. Maximal degree in co-relation 62391. Up to 7331 conditions per place. [2024-06-14 11:42:05,051 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 435 selfloop transitions, 88 changer transitions 2/533 dead transitions. [2024-06-14 11:42:05,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 533 transitions, 8195 flow [2024-06-14 11:42:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:42:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:42:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 11:42:05,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2024-06-14 11:42:05,081 INFO L175 Difference]: Start difference. First operand has 403 places, 499 transitions, 6599 flow. Second operand 9 states and 223 transitions. [2024-06-14 11:42:05,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 533 transitions, 8195 flow [2024-06-14 11:42:16,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 533 transitions, 7731 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:42:16,883 INFO L231 Difference]: Finished difference. Result has 405 places, 503 transitions, 6493 flow [2024-06-14 11:42:16,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6493, PETRI_PLACES=405, PETRI_TRANSITIONS=503} [2024-06-14 11:42:16,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-14 11:42:16,884 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 503 transitions, 6493 flow [2024-06-14 11:42:16,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:16,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:16,884 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] [2024-06-14 11:42:16,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 11:42:16,885 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:16,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1089917379, now seen corresponding path program 5 times [2024-06-14 11:42:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:16,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97312196] [2024-06-14 11:42:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97312196] [2024-06-14 11:42:16,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97312196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:16,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:16,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:16,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138742818] [2024-06-14 11:42:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:16,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:16,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:17,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:42:17,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 503 transitions, 6493 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:17,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:17,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:42:17,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:18,822 INFO L124 PetriNetUnfolderBase]: 4829/8335 cut-off events. [2024-06-14 11:42:18,823 INFO L125 PetriNetUnfolderBase]: For 1752120/1752120 co-relation queries the response was YES. [2024-06-14 11:42:18,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62097 conditions, 8335 events. 4829/8335 cut-off events. For 1752120/1752120 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61363 event pairs, 1292 based on Foata normal form. 2/8333 useless extension candidates. Maximal degree in co-relation 61893. Up to 7381 conditions per place. [2024-06-14 11:42:18,943 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 83 changer transitions 0/525 dead transitions. [2024-06-14 11:42:18,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 525 transitions, 7581 flow [2024-06-14 11:42:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:42:18,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726744186046512 [2024-06-14 11:42:18,944 INFO L175 Difference]: Start difference. First operand has 405 places, 503 transitions, 6493 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:42:18,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 525 transitions, 7581 flow [2024-06-14 11:42:29,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 525 transitions, 7291 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 11:42:29,410 INFO L231 Difference]: Finished difference. Result has 407 places, 503 transitions, 6374 flow [2024-06-14 11:42:29,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6374, PETRI_PLACES=407, PETRI_TRANSITIONS=503} [2024-06-14 11:42:29,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-14 11:42:29,412 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 503 transitions, 6374 flow [2024-06-14 11:42:29,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:29,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:29,412 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] [2024-06-14 11:42:29,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 11:42:29,413 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2010254229, now seen corresponding path program 6 times [2024-06-14 11:42:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:29,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161584635] [2024-06-14 11:42:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:29,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:29,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:29,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161584635] [2024-06-14 11:42:29,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161584635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:29,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:29,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:29,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467236274] [2024-06-14 11:42:29,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:29,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:29,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:29,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:29,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:42:29,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 503 transitions, 6374 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:29,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:29,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:42:29,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:31,560 INFO L124 PetriNetUnfolderBase]: 4896/8444 cut-off events. [2024-06-14 11:42:31,560 INFO L125 PetriNetUnfolderBase]: For 1895147/1895147 co-relation queries the response was YES. [2024-06-14 11:42:31,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64562 conditions, 8444 events. 4896/8444 cut-off events. For 1895147/1895147 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 62316 event pairs, 1302 based on Foata normal form. 2/8441 useless extension candidates. Maximal degree in co-relation 64357. Up to 7395 conditions per place. [2024-06-14 11:42:31,686 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 441 selfloop transitions, 90 changer transitions 0/539 dead transitions. [2024-06-14 11:42:31,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 539 transitions, 8004 flow [2024-06-14 11:42:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:42:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:42:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 11:42:31,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 11:42:31,687 INFO L175 Difference]: Start difference. First operand has 407 places, 503 transitions, 6374 flow. Second operand 10 states and 245 transitions. [2024-06-14 11:42:31,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 539 transitions, 8004 flow [2024-06-14 11:42:43,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 539 transitions, 7818 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:42:43,496 INFO L231 Difference]: Finished difference. Result has 411 places, 507 transitions, 6560 flow [2024-06-14 11:42:43,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6560, PETRI_PLACES=411, PETRI_TRANSITIONS=507} [2024-06-14 11:42:43,496 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-14 11:42:43,497 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 507 transitions, 6560 flow [2024-06-14 11:42:43,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:43,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:43,497 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] [2024-06-14 11:42:43,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 11:42:43,497 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:43,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2007397269, now seen corresponding path program 7 times [2024-06-14 11:42:43,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:43,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784683186] [2024-06-14 11:42:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:43,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:43,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:43,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784683186] [2024-06-14 11:42:43,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784683186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:43,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:43,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:43,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489198202] [2024-06-14 11:42:43,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:43,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:43,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:43,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:43,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:42:43,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 507 transitions, 6560 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:43,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:43,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:42:43,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:45,615 INFO L124 PetriNetUnfolderBase]: 4904/8464 cut-off events. [2024-06-14 11:42:45,616 INFO L125 PetriNetUnfolderBase]: For 1921524/1921524 co-relation queries the response was YES. [2024-06-14 11:42:45,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65097 conditions, 8464 events. 4904/8464 cut-off events. For 1921524/1921524 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 62421 event pairs, 1312 based on Foata normal form. 2/8462 useless extension candidates. Maximal degree in co-relation 64890. Up to 7494 conditions per place. [2024-06-14 11:42:45,738 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 440 selfloop transitions, 85 changer transitions 0/533 dead transitions. [2024-06-14 11:42:45,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 533 transitions, 7761 flow [2024-06-14 11:42:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:42:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:42:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 11:42:45,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511627906976744 [2024-06-14 11:42:45,740 INFO L175 Difference]: Start difference. First operand has 411 places, 507 transitions, 6560 flow. Second operand 10 states and 237 transitions. [2024-06-14 11:42:45,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 533 transitions, 7761 flow [2024-06-14 11:42:56,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 533 transitions, 7499 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 11:42:56,318 INFO L231 Difference]: Finished difference. Result has 414 places, 509 transitions, 6570 flow [2024-06-14 11:42:56,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6310, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6570, PETRI_PLACES=414, PETRI_TRANSITIONS=509} [2024-06-14 11:42:56,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-14 11:42:56,318 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 509 transitions, 6570 flow [2024-06-14 11:42:56,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:56,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:56,319 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] [2024-06-14 11:42:56,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 11:42:56,319 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:56,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash -533214101, now seen corresponding path program 8 times [2024-06-14 11:42:56,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288413153] [2024-06-14 11:42:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:56,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:56,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:56,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288413153] [2024-06-14 11:42:56,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288413153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:56,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:56,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:56,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349111965] [2024-06-14 11:42:56,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:56,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:56,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:42:56,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 509 transitions, 6570 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:56,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:56,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:42:56,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:58,701 INFO L124 PetriNetUnfolderBase]: 4912/8480 cut-off events. [2024-06-14 11:42:58,701 INFO L125 PetriNetUnfolderBase]: For 1944825/1944825 co-relation queries the response was YES. [2024-06-14 11:42:58,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65202 conditions, 8480 events. 4912/8480 cut-off events. For 1944825/1944825 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62663 event pairs, 1118 based on Foata normal form. 2/8478 useless extension candidates. Maximal degree in co-relation 64994. Up to 6669 conditions per place. [2024-06-14 11:42:58,843 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 430 selfloop transitions, 109 changer transitions 0/547 dead transitions. [2024-06-14 11:42:58,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 547 transitions, 8471 flow [2024-06-14 11:42:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:42:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:42:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-14 11:42:58,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943152454780362 [2024-06-14 11:42:58,844 INFO L175 Difference]: Start difference. First operand has 414 places, 509 transitions, 6570 flow. Second operand 9 states and 230 transitions. [2024-06-14 11:42:58,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 547 transitions, 8471 flow [2024-06-14 11:43:10,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 547 transitions, 8238 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 11:43:10,108 INFO L231 Difference]: Finished difference. Result has 415 places, 511 transitions, 6647 flow [2024-06-14 11:43:10,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6647, PETRI_PLACES=415, PETRI_TRANSITIONS=511} [2024-06-14 11:43:10,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 11:43:10,108 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 511 transitions, 6647 flow [2024-06-14 11:43:10,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:10,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:10,108 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] [2024-06-14 11:43:10,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 11:43:10,109 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:10,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 333542693, now seen corresponding path program 9 times [2024-06-14 11:43:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:10,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176510131] [2024-06-14 11:43:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:10,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:10,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176510131] [2024-06-14 11:43:10,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176510131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:10,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:10,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:10,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366408981] [2024-06-14 11:43:10,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:10,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:10,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:43:10,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 511 transitions, 6647 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:10,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:10,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:43:10,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:12,237 INFO L124 PetriNetUnfolderBase]: 4887/8429 cut-off events. [2024-06-14 11:43:12,238 INFO L125 PetriNetUnfolderBase]: For 1945339/1945339 co-relation queries the response was YES. [2024-06-14 11:43:12,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64017 conditions, 8429 events. 4887/8429 cut-off events. For 1945339/1945339 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62155 event pairs, 1129 based on Foata normal form. 8/8433 useless extension candidates. Maximal degree in co-relation 63808. Up to 6655 conditions per place. [2024-06-14 11:43:12,573 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 430 selfloop transitions, 106 changer transitions 0/544 dead transitions. [2024-06-14 11:43:12,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 544 transitions, 8139 flow [2024-06-14 11:43:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:43:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:43:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 11:43:12,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58656330749354 [2024-06-14 11:43:12,575 INFO L175 Difference]: Start difference. First operand has 415 places, 511 transitions, 6647 flow. Second operand 9 states and 227 transitions. [2024-06-14 11:43:12,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 544 transitions, 8139 flow [2024-06-14 11:43:21,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 544 transitions, 7770 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-14 11:43:21,040 INFO L231 Difference]: Finished difference. Result has 415 places, 511 transitions, 6496 flow [2024-06-14 11:43:21,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6278, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6496, PETRI_PLACES=415, PETRI_TRANSITIONS=511} [2024-06-14 11:43:21,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 11:43:21,041 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 511 transitions, 6496 flow [2024-06-14 11:43:21,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:21,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:21,041 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] [2024-06-14 11:43:21,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 11:43:21,041 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:21,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:21,042 INFO L85 PathProgramCache]: Analyzing trace with hash 120596897, now seen corresponding path program 10 times [2024-06-14 11:43:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:21,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969273010] [2024-06-14 11:43:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:21,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:21,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969273010] [2024-06-14 11:43:21,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969273010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:21,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:21,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:21,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574177669] [2024-06-14 11:43:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:21,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:21,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:21,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:21,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:21,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:43:21,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 511 transitions, 6496 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:21,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:21,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:43:21,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:23,082 INFO L124 PetriNetUnfolderBase]: 4864/8406 cut-off events. [2024-06-14 11:43:23,082 INFO L125 PetriNetUnfolderBase]: For 1863714/1863714 co-relation queries the response was YES. [2024-06-14 11:43:23,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61716 conditions, 8406 events. 4864/8406 cut-off events. For 1863714/1863714 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62125 event pairs, 1294 based on Foata normal form. 10/8412 useless extension candidates. Maximal degree in co-relation 61509. Up to 7402 conditions per place. [2024-06-14 11:43:23,206 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 82 changer transitions 0/533 dead transitions. [2024-06-14 11:43:23,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 533 transitions, 7612 flow [2024-06-14 11:43:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:43:23,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 11:43:23,208 INFO L175 Difference]: Start difference. First operand has 415 places, 511 transitions, 6496 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:43:23,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 533 transitions, 7612 flow [2024-06-14 11:43:33,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 533 transitions, 7327 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 11:43:33,932 INFO L231 Difference]: Finished difference. Result has 415 places, 511 transitions, 6381 flow [2024-06-14 11:43:33,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6381, PETRI_PLACES=415, PETRI_TRANSITIONS=511} [2024-06-14 11:43:33,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 11:43:33,933 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 511 transitions, 6381 flow [2024-06-14 11:43:33,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:33,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:33,933 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] [2024-06-14 11:43:33,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 11:43:33,934 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:33,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 290066833, now seen corresponding path program 11 times [2024-06-14 11:43:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:33,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794545462] [2024-06-14 11:43:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:33,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:34,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794545462] [2024-06-14 11:43:34,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794545462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:34,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:34,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:34,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563427895] [2024-06-14 11:43:34,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:34,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:34,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:34,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:43:34,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 511 transitions, 6381 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:34,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:34,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:43:34,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:36,045 INFO L124 PetriNetUnfolderBase]: 4834/8356 cut-off events. [2024-06-14 11:43:36,045 INFO L125 PetriNetUnfolderBase]: For 1755345/1755345 co-relation queries the response was YES. [2024-06-14 11:43:36,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59352 conditions, 8356 events. 4834/8356 cut-off events. For 1755345/1755345 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61669 event pairs, 1264 based on Foata normal form. 10/8362 useless extension candidates. Maximal degree in co-relation 59144. Up to 7140 conditions per place. [2024-06-14 11:43:36,172 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 441 selfloop transitions, 88 changer transitions 0/537 dead transitions. [2024-06-14 11:43:36,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 537 transitions, 7527 flow [2024-06-14 11:43:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:43:36,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843023255813954 [2024-06-14 11:43:36,173 INFO L175 Difference]: Start difference. First operand has 415 places, 511 transitions, 6381 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:43:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 537 transitions, 7527 flow [2024-06-14 11:43:46,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 537 transitions, 7296 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 11:43:46,941 INFO L231 Difference]: Finished difference. Result has 416 places, 511 transitions, 6333 flow [2024-06-14 11:43:46,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6333, PETRI_PLACES=416, PETRI_TRANSITIONS=511} [2024-06-14 11:43:46,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 11:43:46,942 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 511 transitions, 6333 flow [2024-06-14 11:43:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:46,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:46,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 11:43:46,943 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:46,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash -672684147, now seen corresponding path program 12 times [2024-06-14 11:43:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:46,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302538248] [2024-06-14 11:43:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:47,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:47,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302538248] [2024-06-14 11:43:47,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302538248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:47,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:47,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:43:47,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901763594] [2024-06-14 11:43:47,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:47,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:43:47,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:47,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:43:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:43:47,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:43:47,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 511 transitions, 6333 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:47,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:47,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:43:47,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:49,066 INFO L124 PetriNetUnfolderBase]: 4870/8390 cut-off events. [2024-06-14 11:43:49,066 INFO L125 PetriNetUnfolderBase]: For 1778716/1778716 co-relation queries the response was YES. [2024-06-14 11:43:49,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59801 conditions, 8390 events. 4870/8390 cut-off events. For 1778716/1778716 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 61872 event pairs, 1312 based on Foata normal form. 10/8382 useless extension candidates. Maximal degree in co-relation 59592. Up to 7412 conditions per place. [2024-06-14 11:43:49,193 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 86 changer transitions 0/528 dead transitions. [2024-06-14 11:43:49,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 528 transitions, 7504 flow [2024-06-14 11:43:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:43:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:43:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:43:49,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:43:49,194 INFO L175 Difference]: Start difference. First operand has 416 places, 511 transitions, 6333 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:43:49,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 528 transitions, 7504 flow [2024-06-14 11:43:57,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 528 transitions, 7299 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:43:57,808 INFO L231 Difference]: Finished difference. Result has 415 places, 513 transitions, 6393 flow [2024-06-14 11:43:57,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6128, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6393, PETRI_PLACES=415, PETRI_TRANSITIONS=513} [2024-06-14 11:43:57,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 11:43:57,812 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 513 transitions, 6393 flow [2024-06-14 11:43:57,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:57,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:57,812 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] [2024-06-14 11:43:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 11:43:57,812 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:57,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash 410811213, now seen corresponding path program 13 times [2024-06-14 11:43:57,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:57,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628580284] [2024-06-14 11:43:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:57,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628580284] [2024-06-14 11:43:57,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628580284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:57,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:57,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:43:57,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001119274] [2024-06-14 11:43:57,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:57,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:43:57,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:43:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:43:57,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:43:57,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 513 transitions, 6393 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:57,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:57,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:43:57,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:59,872 INFO L124 PetriNetUnfolderBase]: 4906/8466 cut-off events. [2024-06-14 11:43:59,872 INFO L125 PetriNetUnfolderBase]: For 1803012/1803012 co-relation queries the response was YES. [2024-06-14 11:43:59,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60424 conditions, 8466 events. 4906/8466 cut-off events. For 1803012/1803012 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62672 event pairs, 1330 based on Foata normal form. 10/8458 useless extension candidates. Maximal degree in co-relation 60214. Up to 7468 conditions per place. [2024-06-14 11:44:00,001 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 440 selfloop transitions, 82 changer transitions 0/530 dead transitions. [2024-06-14 11:44:00,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 530 transitions, 7572 flow [2024-06-14 11:44:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:44:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:44:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:44:00,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681063122923588 [2024-06-14 11:44:00,002 INFO L175 Difference]: Start difference. First operand has 415 places, 513 transitions, 6393 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:44:00,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 530 transitions, 7572 flow [2024-06-14 11:44:09,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 530 transitions, 7346 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:44:09,089 INFO L231 Difference]: Finished difference. Result has 417 places, 515 transitions, 6428 flow [2024-06-14 11:44:09,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6167, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6428, PETRI_PLACES=417, PETRI_TRANSITIONS=515} [2024-06-14 11:44:09,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 11:44:09,089 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 515 transitions, 6428 flow [2024-06-14 11:44:09,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:09,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:09,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:09,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 11:44:09,090 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:09,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash -427138611, now seen corresponding path program 14 times [2024-06-14 11:44:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:09,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296846767] [2024-06-14 11:44:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:09,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:09,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:09,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296846767] [2024-06-14 11:44:09,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296846767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:09,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:09,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:44:09,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191473635] [2024-06-14 11:44:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:09,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:44:09,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:44:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:44:09,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:44:09,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 515 transitions, 6428 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:09,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:09,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:44:09,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:11,158 INFO L124 PetriNetUnfolderBase]: 4876/8410 cut-off events. [2024-06-14 11:44:11,159 INFO L125 PetriNetUnfolderBase]: For 1690527/1690527 co-relation queries the response was YES. [2024-06-14 11:44:11,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58296 conditions, 8410 events. 4876/8410 cut-off events. For 1690527/1690527 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62134 event pairs, 1300 based on Foata normal form. 10/8402 useless extension candidates. Maximal degree in co-relation 58085. Up to 7104 conditions per place. [2024-06-14 11:44:11,282 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 438 selfloop transitions, 88 changer transitions 0/534 dead transitions. [2024-06-14 11:44:11,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 534 transitions, 7550 flow [2024-06-14 11:44:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:44:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:44:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:44:11,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-14 11:44:11,284 INFO L175 Difference]: Start difference. First operand has 417 places, 515 transitions, 6428 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:44:11,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 534 transitions, 7550 flow [2024-06-14 11:44:19,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 534 transitions, 7280 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 11:44:19,398 INFO L231 Difference]: Finished difference. Result has 419 places, 515 transitions, 6342 flow [2024-06-14 11:44:19,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6158, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6342, PETRI_PLACES=419, PETRI_TRANSITIONS=515} [2024-06-14 11:44:19,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 11:44:19,399 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 515 transitions, 6342 flow [2024-06-14 11:44:19,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:19,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:19,399 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] [2024-06-14 11:44:19,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 11:44:19,400 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:19,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash 507191293, now seen corresponding path program 1 times [2024-06-14 11:44:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:19,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968119205] [2024-06-14 11:44:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:19,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968119205] [2024-06-14 11:44:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968119205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:19,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:19,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:44:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212247069] [2024-06-14 11:44:19,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:44:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:44:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:44:19,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:44:19,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 515 transitions, 6342 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:19,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:19,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:44:19,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:21,432 INFO L124 PetriNetUnfolderBase]: 4929/8505 cut-off events. [2024-06-14 11:44:21,432 INFO L125 PetriNetUnfolderBase]: For 1736794/1736794 co-relation queries the response was YES. [2024-06-14 11:44:21,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59764 conditions, 8505 events. 4929/8505 cut-off events. For 1736794/1736794 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62900 event pairs, 1076 based on Foata normal form. 6/8505 useless extension candidates. Maximal degree in co-relation 59552. Up to 7061 conditions per place. [2024-06-14 11:44:21,561 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 455 selfloop transitions, 83 changer transitions 0/546 dead transitions. [2024-06-14 11:44:21,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 546 transitions, 8244 flow [2024-06-14 11:44:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:44:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:44:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:44:21,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-14 11:44:21,562 INFO L175 Difference]: Start difference. First operand has 419 places, 515 transitions, 6342 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:44:21,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 546 transitions, 8244 flow [2024-06-14 11:44:30,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 546 transitions, 8034 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 11:44:30,827 INFO L231 Difference]: Finished difference. Result has 420 places, 517 transitions, 6381 flow [2024-06-14 11:44:30,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=420, PETRI_TRANSITIONS=517} [2024-06-14 11:44:30,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-14 11:44:30,827 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 517 transitions, 6381 flow [2024-06-14 11:44:30,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:30,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:30,828 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] [2024-06-14 11:44:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 11:44:30,828 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:30,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1913761863, now seen corresponding path program 2 times [2024-06-14 11:44:30,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005210768] [2024-06-14 11:44:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005210768] [2024-06-14 11:44:30,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005210768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:30,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:30,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:44:30,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615707137] [2024-06-14 11:44:30,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:44:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:44:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:44:30,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:44:30,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 517 transitions, 6381 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:30,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:30,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:44:30,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:32,917 INFO L124 PetriNetUnfolderBase]: 4995/8631 cut-off events. [2024-06-14 11:44:32,918 INFO L125 PetriNetUnfolderBase]: For 1866987/1866987 co-relation queries the response was YES. [2024-06-14 11:44:33,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62149 conditions, 8631 events. 4995/8631 cut-off events. For 1866987/1866987 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64082 event pairs, 1078 based on Foata normal form. 6/8631 useless extension candidates. Maximal degree in co-relation 61936. Up to 7097 conditions per place. [2024-06-14 11:44:33,054 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 454 selfloop transitions, 90 changer transitions 0/552 dead transitions. [2024-06-14 11:44:33,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 552 transitions, 8319 flow [2024-06-14 11:44:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:44:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:44:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 11:44:33,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-14 11:44:33,056 INFO L175 Difference]: Start difference. First operand has 420 places, 517 transitions, 6381 flow. Second operand 7 states and 188 transitions. [2024-06-14 11:44:33,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 552 transitions, 8319 flow [2024-06-14 11:44:42,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 552 transitions, 8174 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 11:44:42,658 INFO L231 Difference]: Finished difference. Result has 424 places, 519 transitions, 6502 flow [2024-06-14 11:44:42,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6242, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6502, PETRI_PLACES=424, PETRI_TRANSITIONS=519} [2024-06-14 11:44:42,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 11:44:42,659 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 519 transitions, 6502 flow [2024-06-14 11:44:42,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:42,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:42,659 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] [2024-06-14 11:44:42,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 11:44:42,660 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:42,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash -897777183, now seen corresponding path program 3 times [2024-06-14 11:44:42,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:42,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851189550] [2024-06-14 11:44:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:42,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:42,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851189550] [2024-06-14 11:44:42,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851189550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:42,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:42,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:44:42,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601149909] [2024-06-14 11:44:42,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:42,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:44:42,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:44:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:44:42,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:44:42,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 519 transitions, 6502 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:42,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:42,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:44:42,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:44,831 INFO L124 PetriNetUnfolderBase]: 4982/8602 cut-off events. [2024-06-14 11:44:44,831 INFO L125 PetriNetUnfolderBase]: For 1805774/1805774 co-relation queries the response was YES. [2024-06-14 11:44:44,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61038 conditions, 8602 events. 4982/8602 cut-off events. For 1805774/1805774 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 63882 event pairs, 1296 based on Foata normal form. 6/8595 useless extension candidates. Maximal degree in co-relation 60824. Up to 7570 conditions per place. [2024-06-14 11:44:44,963 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 468 selfloop transitions, 68 changer transitions 0/544 dead transitions. [2024-06-14 11:44:44,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 544 transitions, 7984 flow [2024-06-14 11:44:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:44:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:44:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:44:44,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-14 11:44:44,964 INFO L175 Difference]: Start difference. First operand has 424 places, 519 transitions, 6502 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:44:44,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 544 transitions, 7984 flow [2024-06-14 11:44:55,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 544 transitions, 7825 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:44:55,045 INFO L231 Difference]: Finished difference. Result has 428 places, 519 transitions, 6483 flow [2024-06-14 11:44:55,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6483, PETRI_PLACES=428, PETRI_TRANSITIONS=519} [2024-06-14 11:44:55,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 11:44:55,045 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 519 transitions, 6483 flow [2024-06-14 11:44:55,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:55,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:55,046 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] [2024-06-14 11:44:55,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 11:44:55,046 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:55,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash 876954597, now seen corresponding path program 4 times [2024-06-14 11:44:55,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:55,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396157230] [2024-06-14 11:44:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:55,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:55,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396157230] [2024-06-14 11:44:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396157230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:55,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:55,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:44:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921799040] [2024-06-14 11:44:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:44:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:44:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:44:55,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:44:55,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 519 transitions, 6483 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:55,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:55,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:44:55,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:57,137 INFO L124 PetriNetUnfolderBase]: 5010/8659 cut-off events. [2024-06-14 11:44:57,137 INFO L125 PetriNetUnfolderBase]: For 1854415/1854415 co-relation queries the response was YES. [2024-06-14 11:44:57,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61204 conditions, 8659 events. 5010/8659 cut-off events. For 1854415/1854415 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64518 event pairs, 1317 based on Foata normal form. 8/8661 useless extension candidates. Maximal degree in co-relation 60989. Up to 7720 conditions per place. [2024-06-14 11:44:57,273 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 468 selfloop transitions, 62 changer transitions 0/538 dead transitions. [2024-06-14 11:44:57,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 538 transitions, 7642 flow [2024-06-14 11:44:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:44:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:44:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:44:57,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:44:57,274 INFO L175 Difference]: Start difference. First operand has 428 places, 519 transitions, 6483 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:44:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 538 transitions, 7642 flow [2024-06-14 11:45:09,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 538 transitions, 7362 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:45:09,730 INFO L231 Difference]: Finished difference. Result has 427 places, 520 transitions, 6381 flow [2024-06-14 11:45:09,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=427, PETRI_TRANSITIONS=520} [2024-06-14 11:45:09,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-14 11:45:09,731 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 520 transitions, 6381 flow [2024-06-14 11:45:09,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:09,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:09,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 11:45:09,731 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:09,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1133455107, now seen corresponding path program 5 times [2024-06-14 11:45:09,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:09,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313195213] [2024-06-14 11:45:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:09,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:09,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313195213] [2024-06-14 11:45:09,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313195213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:09,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:09,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:45:09,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71019717] [2024-06-14 11:45:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:45:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:45:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:45:09,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:45:09,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 520 transitions, 6381 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:09,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:09,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:45:09,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:11,881 INFO L124 PetriNetUnfolderBase]: 4992/8631 cut-off events. [2024-06-14 11:45:11,881 INFO L125 PetriNetUnfolderBase]: For 1760880/1760880 co-relation queries the response was YES. [2024-06-14 11:45:11,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59311 conditions, 8631 events. 4992/8631 cut-off events. For 1760880/1760880 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64225 event pairs, 1307 based on Foata normal form. 8/8633 useless extension candidates. Maximal degree in co-relation 59096. Up to 7694 conditions per place. [2024-06-14 11:45:12,026 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 470 selfloop transitions, 60 changer transitions 0/538 dead transitions. [2024-06-14 11:45:12,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 538 transitions, 7497 flow [2024-06-14 11:45:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:45:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:45:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:45:12,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:45:12,027 INFO L175 Difference]: Start difference. First operand has 427 places, 520 transitions, 6381 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:45:12,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 538 transitions, 7497 flow [2024-06-14 11:45:23,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 538 transitions, 7338 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:45:23,392 INFO L231 Difference]: Finished difference. Result has 429 places, 520 transitions, 6351 flow [2024-06-14 11:45:23,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6222, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6351, PETRI_PLACES=429, PETRI_TRANSITIONS=520} [2024-06-14 11:45:23,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-14 11:45:23,392 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 520 transitions, 6351 flow [2024-06-14 11:45:23,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:23,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:23,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:23,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 11:45:23,393 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:23,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1130598147, now seen corresponding path program 6 times [2024-06-14 11:45:23,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:23,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501126491] [2024-06-14 11:45:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:23,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:23,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501126491] [2024-06-14 11:45:23,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501126491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:23,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:23,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:45:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105346412] [2024-06-14 11:45:23,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:23,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:45:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:45:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:45:23,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:45:23,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 520 transitions, 6351 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:23,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:23,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:45:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:25,416 INFO L124 PetriNetUnfolderBase]: 4974/8617 cut-off events. [2024-06-14 11:45:25,416 INFO L125 PetriNetUnfolderBase]: For 1664903/1664903 co-relation queries the response was YES. [2024-06-14 11:45:25,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57593 conditions, 8617 events. 4974/8617 cut-off events. For 1664903/1664903 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64234 event pairs, 1203 based on Foata normal form. 8/8619 useless extension candidates. Maximal degree in co-relation 57377. Up to 7476 conditions per place. [2024-06-14 11:45:25,719 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 462 selfloop transitions, 72 changer transitions 0/542 dead transitions. [2024-06-14 11:45:25,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 542 transitions, 7497 flow [2024-06-14 11:45:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:45:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:45:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:45:25,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-14 11:45:25,720 INFO L175 Difference]: Start difference. First operand has 429 places, 520 transitions, 6351 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:45:25,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 542 transitions, 7497 flow [2024-06-14 11:45:36,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 542 transitions, 7332 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:45:36,065 INFO L231 Difference]: Finished difference. Result has 430 places, 520 transitions, 6338 flow [2024-06-14 11:45:36,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6338, PETRI_PLACES=430, PETRI_TRANSITIONS=520} [2024-06-14 11:45:36,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-14 11:45:36,066 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 520 transitions, 6338 flow [2024-06-14 11:45:36,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:36,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:36,066 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] [2024-06-14 11:45:36,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 11:45:36,066 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:36,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash -296317657, now seen corresponding path program 1 times [2024-06-14 11:45:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:36,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212373099] [2024-06-14 11:45:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:36,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:36,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:36,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212373099] [2024-06-14 11:45:36,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212373099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:36,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:36,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:36,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683034423] [2024-06-14 11:45:36,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:36,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:36,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:36,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:45:36,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 520 transitions, 6338 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:36,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:36,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:45:36,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:38,200 INFO L124 PetriNetUnfolderBase]: 4995/8646 cut-off events. [2024-06-14 11:45:38,200 INFO L125 PetriNetUnfolderBase]: For 1613505/1613505 co-relation queries the response was YES. [2024-06-14 11:45:38,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58152 conditions, 8646 events. 4995/8646 cut-off events. For 1613505/1613505 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 64458 event pairs, 1304 based on Foata normal form. 1/8641 useless extension candidates. Maximal degree in co-relation 57935. Up to 7567 conditions per place. [2024-06-14 11:45:38,331 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 423 selfloop transitions, 118 changer transitions 0/549 dead transitions. [2024-06-14 11:45:38,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 549 transitions, 8276 flow [2024-06-14 11:45:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:45:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:45:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:45:38,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-14 11:45:38,333 INFO L175 Difference]: Start difference. First operand has 430 places, 520 transitions, 6338 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:45:38,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 549 transitions, 8276 flow [2024-06-14 11:45:48,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 549 transitions, 8061 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:45:48,362 INFO L231 Difference]: Finished difference. Result has 433 places, 529 transitions, 6599 flow [2024-06-14 11:45:48,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6599, PETRI_PLACES=433, PETRI_TRANSITIONS=529} [2024-06-14 11:45:48,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-14 11:45:48,363 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 529 transitions, 6599 flow [2024-06-14 11:45:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:48,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:48,363 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, 1, 1] [2024-06-14 11:45:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 11:45:48,363 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:48,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 982377735, now seen corresponding path program 2 times [2024-06-14 11:45:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303911524] [2024-06-14 11:45:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:48,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:48,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303911524] [2024-06-14 11:45:48,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303911524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:48,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:48,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:45:48,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098806893] [2024-06-14 11:45:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:45:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:45:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:45:48,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:45:48,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 529 transitions, 6599 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:48,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:48,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:45:48,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:50,589 INFO L124 PetriNetUnfolderBase]: 5000/8647 cut-off events. [2024-06-14 11:45:50,589 INFO L125 PetriNetUnfolderBase]: For 1631571/1631571 co-relation queries the response was YES. [2024-06-14 11:45:50,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58504 conditions, 8647 events. 5000/8647 cut-off events. For 1631571/1631571 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64505 event pairs, 1304 based on Foata normal form. 1/8642 useless extension candidates. Maximal degree in co-relation 58284. Up to 7573 conditions per place. [2024-06-14 11:45:50,922 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 413 selfloop transitions, 127 changer transitions 0/548 dead transitions. [2024-06-14 11:45:50,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 548 transitions, 8451 flow [2024-06-14 11:45:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:45:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:45:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:45:50,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 11:45:50,923 INFO L175 Difference]: Start difference. First operand has 433 places, 529 transitions, 6599 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:45:50,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 548 transitions, 8451 flow [2024-06-14 11:46:01,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 548 transitions, 8277 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 11:46:01,807 INFO L231 Difference]: Finished difference. Result has 435 places, 532 transitions, 6748 flow [2024-06-14 11:46:01,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6432, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6748, PETRI_PLACES=435, PETRI_TRANSITIONS=532} [2024-06-14 11:46:01,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-14 11:46:01,808 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 532 transitions, 6748 flow [2024-06-14 11:46:01,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:01,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:01,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:01,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 11:46:01,809 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:01,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash -148708057, now seen corresponding path program 3 times [2024-06-14 11:46:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:01,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977801828] [2024-06-14 11:46:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:01,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:01,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:01,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977801828] [2024-06-14 11:46:01,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977801828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:01,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:01,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611445912] [2024-06-14 11:46:01,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:01,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:01,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:01,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:46:01,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 532 transitions, 6748 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:01,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:01,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:46:01,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:03,938 INFO L124 PetriNetUnfolderBase]: 4997/8643 cut-off events. [2024-06-14 11:46:03,938 INFO L125 PetriNetUnfolderBase]: For 1618019/1618019 co-relation queries the response was YES. [2024-06-14 11:46:04,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58366 conditions, 8643 events. 4997/8643 cut-off events. For 1618019/1618019 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64457 event pairs, 1304 based on Foata normal form. 1/8638 useless extension candidates. Maximal degree in co-relation 58146. Up to 7570 conditions per place. [2024-06-14 11:46:04,080 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 118 changer transitions 0/547 dead transitions. [2024-06-14 11:46:04,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 547 transitions, 8202 flow [2024-06-14 11:46:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:46:04,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 11:46:04,082 INFO L175 Difference]: Start difference. First operand has 435 places, 532 transitions, 6748 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:46:04,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 547 transitions, 8202 flow [2024-06-14 11:46:15,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 547 transitions, 7970 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:46:15,352 INFO L231 Difference]: Finished difference. Result has 437 places, 532 transitions, 6768 flow [2024-06-14 11:46:15,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6518, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6768, PETRI_PLACES=437, PETRI_TRANSITIONS=532} [2024-06-14 11:46:15,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 11:46:15,353 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 532 transitions, 6768 flow [2024-06-14 11:46:15,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:15,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:15,353 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] [2024-06-14 11:46:15,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 11:46:15,354 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:15,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash 876752167, now seen corresponding path program 4 times [2024-06-14 11:46:15,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:15,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540375064] [2024-06-14 11:46:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:15,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:15,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:15,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540375064] [2024-06-14 11:46:15,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540375064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:15,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:15,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:15,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97922507] [2024-06-14 11:46:15,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:15,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:15,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:15,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:15,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:46:15,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 532 transitions, 6768 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:15,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:15,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:46:15,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:17,472 INFO L124 PetriNetUnfolderBase]: 5002/8652 cut-off events. [2024-06-14 11:46:17,473 INFO L125 PetriNetUnfolderBase]: For 1618595/1618595 co-relation queries the response was YES. [2024-06-14 11:46:17,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58438 conditions, 8652 events. 5002/8652 cut-off events. For 1618595/1618595 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 64513 event pairs, 1304 based on Foata normal form. 1/8647 useless extension candidates. Maximal degree in co-relation 58218. Up to 7576 conditions per place. [2024-06-14 11:46:17,800 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 424 selfloop transitions, 121 changer transitions 0/553 dead transitions. [2024-06-14 11:46:17,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 553 transitions, 8296 flow [2024-06-14 11:46:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:46:17,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 11:46:17,801 INFO L175 Difference]: Start difference. First operand has 437 places, 532 transitions, 6768 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:46:17,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 553 transitions, 8296 flow [2024-06-14 11:46:29,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 553 transitions, 7972 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:46:29,164 INFO L231 Difference]: Finished difference. Result has 436 places, 535 transitions, 6754 flow [2024-06-14 11:46:29,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6452, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6754, PETRI_PLACES=436, PETRI_TRANSITIONS=535} [2024-06-14 11:46:29,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-14 11:46:29,165 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 535 transitions, 6754 flow [2024-06-14 11:46:29,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:29,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:29,165 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] [2024-06-14 11:46:29,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 11:46:29,165 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:29,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:29,166 INFO L85 PathProgramCache]: Analyzing trace with hash 876959557, now seen corresponding path program 5 times [2024-06-14 11:46:29,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:29,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214150832] [2024-06-14 11:46:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:29,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:29,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214150832] [2024-06-14 11:46:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214150832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:29,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:29,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588232839] [2024-06-14 11:46:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:29,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:46:29,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 535 transitions, 6754 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:29,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:29,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:46:29,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:31,306 INFO L124 PetriNetUnfolderBase]: 5007/8661 cut-off events. [2024-06-14 11:46:31,307 INFO L125 PetriNetUnfolderBase]: For 1617930/1617930 co-relation queries the response was YES. [2024-06-14 11:46:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58484 conditions, 8661 events. 5007/8661 cut-off events. For 1617930/1617930 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64626 event pairs, 1304 based on Foata normal form. 1/8656 useless extension candidates. Maximal degree in co-relation 58264. Up to 7582 conditions per place. [2024-06-14 11:46:31,440 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 422 selfloop transitions, 123 changer transitions 0/553 dead transitions. [2024-06-14 11:46:31,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 553 transitions, 8274 flow [2024-06-14 11:46:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:46:31,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 11:46:31,441 INFO L175 Difference]: Start difference. First operand has 436 places, 535 transitions, 6754 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:46:31,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 553 transitions, 8274 flow [2024-06-14 11:46:42,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 553 transitions, 8016 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:46:42,362 INFO L231 Difference]: Finished difference. Result has 437 places, 538 transitions, 6808 flow [2024-06-14 11:46:42,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6504, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6808, PETRI_PLACES=437, PETRI_TRANSITIONS=538} [2024-06-14 11:46:42,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 11:46:42,363 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 538 transitions, 6808 flow [2024-06-14 11:46:42,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:42,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:42,363 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, 1, 1] [2024-06-14 11:46:42,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 11:46:42,363 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:42,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1133460067, now seen corresponding path program 6 times [2024-06-14 11:46:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:42,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999436658] [2024-06-14 11:46:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:42,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:42,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:42,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999436658] [2024-06-14 11:46:42,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999436658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:42,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:42,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:42,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370145092] [2024-06-14 11:46:42,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:42,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:42,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:42,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:42,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:46:42,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 538 transitions, 6808 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:42,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:42,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:46:42,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:44,518 INFO L124 PetriNetUnfolderBase]: 5004/8657 cut-off events. [2024-06-14 11:46:44,518 INFO L125 PetriNetUnfolderBase]: For 1603397/1603397 co-relation queries the response was YES. [2024-06-14 11:46:44,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58264 conditions, 8657 events. 5004/8657 cut-off events. For 1603397/1603397 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64602 event pairs, 1304 based on Foata normal form. 1/8652 useless extension candidates. Maximal degree in co-relation 58044. Up to 7579 conditions per place. [2024-06-14 11:46:44,653 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 414 selfloop transitions, 130 changer transitions 0/552 dead transitions. [2024-06-14 11:46:44,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 552 transitions, 7930 flow [2024-06-14 11:46:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:46:44,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-14 11:46:44,654 INFO L175 Difference]: Start difference. First operand has 437 places, 538 transitions, 6808 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:46:44,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 552 transitions, 7930 flow [2024-06-14 11:46:54,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 552 transitions, 7727 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:46:54,521 INFO L231 Difference]: Finished difference. Result has 439 places, 538 transitions, 6875 flow [2024-06-14 11:46:54,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6605, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6875, PETRI_PLACES=439, PETRI_TRANSITIONS=538} [2024-06-14 11:46:54,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-14 11:46:54,521 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 538 transitions, 6875 flow [2024-06-14 11:46:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:54,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:54,521 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] [2024-06-14 11:46:54,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 11:46:54,522 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:54,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1100853015, now seen corresponding path program 7 times [2024-06-14 11:46:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223620824] [2024-06-14 11:46:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:54,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223620824] [2024-06-14 11:46:54,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223620824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:54,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:54,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:54,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932047077] [2024-06-14 11:46:54,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:54,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:54,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:54,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:54,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:46:54,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 538 transitions, 6875 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:54,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:54,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:46:54,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:56,817 INFO L124 PetriNetUnfolderBase]: 5070/8749 cut-off events. [2024-06-14 11:46:56,818 INFO L125 PetriNetUnfolderBase]: For 1800502/1800502 co-relation queries the response was YES. [2024-06-14 11:46:56,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60833 conditions, 8749 events. 5070/8749 cut-off events. For 1800502/1800502 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 65365 event pairs, 1306 based on Foata normal form. 6/8731 useless extension candidates. Maximal degree in co-relation 60613. Up to 7445 conditions per place. [2024-06-14 11:46:56,953 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 451 selfloop transitions, 112 changer transitions 0/571 dead transitions. [2024-06-14 11:46:56,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 571 transitions, 8539 flow [2024-06-14 11:46:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:46:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:46:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 11:46:56,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710594315245479 [2024-06-14 11:46:56,954 INFO L175 Difference]: Start difference. First operand has 439 places, 538 transitions, 6875 flow. Second operand 9 states and 221 transitions. [2024-06-14 11:46:56,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 571 transitions, 8539 flow [2024-06-14 11:47:07,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 571 transitions, 8184 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:07,682 INFO L231 Difference]: Finished difference. Result has 440 places, 540 transitions, 6857 flow [2024-06-14 11:47:07,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6857, PETRI_PLACES=440, PETRI_TRANSITIONS=540} [2024-06-14 11:47:07,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 11:47:07,683 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 540 transitions, 6857 flow [2024-06-14 11:47:07,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:07,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:07,683 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] [2024-06-14 11:47:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 11:47:07,683 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:07,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -180108207, now seen corresponding path program 8 times [2024-06-14 11:47:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446832958] [2024-06-14 11:47:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:07,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446832958] [2024-06-14 11:47:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446832958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:07,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859344559] [2024-06-14 11:47:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:07,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 11:47:07,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 540 transitions, 6857 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:07,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:07,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 11:47:07,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:09,891 INFO L124 PetriNetUnfolderBase]: 5052/8745 cut-off events. [2024-06-14 11:47:09,891 INFO L125 PetriNetUnfolderBase]: For 1713587/1713587 co-relation queries the response was YES. [2024-06-14 11:47:10,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59305 conditions, 8745 events. 5052/8745 cut-off events. For 1713587/1713587 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 65456 event pairs, 1344 based on Foata normal form. 8/8747 useless extension candidates. Maximal degree in co-relation 59085. Up to 7692 conditions per place. [2024-06-14 11:47:10,041 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 453 selfloop transitions, 101 changer transitions 0/562 dead transitions. [2024-06-14 11:47:10,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 562 transitions, 8031 flow [2024-06-14 11:47:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:47:10,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563953488372093 [2024-06-14 11:47:10,042 INFO L175 Difference]: Start difference. First operand has 440 places, 540 transitions, 6857 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:47:10,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 562 transitions, 8031 flow Killed by 15