./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_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/safe023_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/safe023_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe023_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 11:31:51,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:31:51,132 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:31:51,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:31:51,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:31:51,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:31:51,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:31:51,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:31:51,172 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:31:51,175 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:31:51,175 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:31:51,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:31:51,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:31:51,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:31:51,178 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:31:51,178 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:31:51,178 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:31:51,178 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:31:51,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:31:51,179 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:31:51,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:31:51,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:31:51,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:31:51,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:31:51,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:31:51,180 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:31:51,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:31:51,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:31:51,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:31:51,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:31:51,182 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:31:51,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:31:51,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:31:51,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:31:51,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:31:51,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:31:51,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:31:51,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:31:51,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:31:51,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:31:51,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:31:51,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:31:51,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:31:51,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:31:51,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:31:51,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:31:51,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:31:51,414 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:31:51,415 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:31:51,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe023_tso.yml/witness.yml [2024-06-14 11:31:51,561 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:31:51,562 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:31:51,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-14 11:31:52,512 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:31:52,752 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:31:52,752 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-14 11:31:52,767 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16b598bf1/b095e515fee84802b95a80248a38c787/FLAGf4369a11e [2024-06-14 11:31:53,070 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16b598bf1/b095e515fee84802b95a80248a38c787 [2024-06-14 11:31:53,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:31:53,071 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:31:53,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:31:53,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:31:53,078 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:31:53,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:31:51" (1/2) ... [2024-06-14 11:31:53,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6a0279 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:31:53, skipping insertion in model container [2024-06-14 11:31:53,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:31:51" (1/2) ... [2024-06-14 11:31:53,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b866078 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:31:53, skipping insertion in model container [2024-06-14 11:31:53,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:31:53" (2/2) ... [2024-06-14 11:31:53,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6a0279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53, skipping insertion in model container [2024-06-14 11:31:53,082 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:31:53" (2/2) ... [2024-06-14 11:31:53,083 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:31:53,121 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:31:53,122 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 11:31:53,122 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 11:31:53,122 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 11:31:53,122 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:31:53,123 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 11:31:53,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:31:53,386 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:31:53,394 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:31:53,504 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:31:53,544 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:31:53,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53 WrapperNode [2024-06-14 11:31:53,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:31:53,546 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:31:53,546 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:31:53,546 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:31:53,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,601 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 11:31:53,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:31:53,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:31:53,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:31:53,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:31:53,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,627 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 11:31:53,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,628 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:31:53,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:31:53,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:31:53,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:31:53,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (1/1) ... [2024-06-14 11:31:53,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:31:53,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:31:53,676 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 11:31:53,679 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 11:31:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:31:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:31:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:31:53,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:31:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:31:53,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:31:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:31:53,709 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:31:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:31:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:31:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:31:53,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:31:53,711 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 11:31:53,845 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:31:53,847 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:31:54,014 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:31:54,014 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:31:54,091 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:31:54,093 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:31:54,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:31:54 BoogieIcfgContainer [2024-06-14 11:31:54,095 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:31:54,096 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:31:54,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:31:54,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:31:54,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:31:51" (1/4) ... [2024-06-14 11:31:54,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6973fe3e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:31:54, skipping insertion in model container [2024-06-14 11:31:54,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:31:53" (2/4) ... [2024-06-14 11:31:54,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6973fe3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:31:54, skipping insertion in model container [2024-06-14 11:31:54,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:31:53" (3/4) ... [2024-06-14 11:31:54,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6973fe3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:31:54, skipping insertion in model container [2024-06-14 11:31:54,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:31:54" (4/4) ... [2024-06-14 11:31:54,112 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-14 11:31:54,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:31:54,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:31:54,129 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:31:54,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:31:54,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 11:31:54,248 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 11:31:54,248 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:31:54,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:31:54,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 11:31:54,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 11:31:54,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:31:54,276 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;@15a7bff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:31:54,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:31:54,281 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:31:54,281 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:31:54,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:31:54,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:54,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:31:54,282 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 11:31:54,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:54,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-14 11:31:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334908648] [2024-06-14 11:31:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:54,779 INFO 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 11:31:54,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:54,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334908648] [2024-06-14 11:31:54,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334908648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:54,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:54,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:31:54,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949290935] [2024-06-14 11:31:54,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:54,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:31:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:54,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:31:54,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:31:54,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-14 11:31:54,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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 11:31:54,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:54,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-14 11:31:54,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:55,015 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-14 11:31:55,016 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 11:31:55,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 795 events. 470/795 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-14 11:31:55,025 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 11:31:55,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-14 11:31:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:31:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:31:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-14 11:31:55,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-14 11:31:55,037 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-14 11:31:55,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-14 11:31:55,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:31:55,042 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 11:31:55,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 11:31:55,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 11:31:55,046 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 11:31:55,046 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 11:31:55,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:55,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:55,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:31:55,047 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 11:31:55,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-14 11:31:55,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:55,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747511079] [2024-06-14 11:31:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:55,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:55,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747511079] [2024-06-14 11:31:55,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747511079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:55,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:55,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:31:55,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367927726] [2024-06-14 11:31:55,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:31:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:31:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:31:55,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:31:55,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:55,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:55,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:31:55,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:55,451 INFO L124 PetriNetUnfolderBase]: 781/1325 cut-off events. [2024-06-14 11:31:55,452 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-14 11:31:55,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 1325 events. 781/1325 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-14 11:31:55,459 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 44 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-14 11:31:55,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 284 flow [2024-06-14 11:31:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:31:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:31:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-14 11:31:55,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2024-06-14 11:31:55,461 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 113 transitions. [2024-06-14 11:31:55,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 284 flow [2024-06-14 11:31:55,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:31:55,463 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 173 flow [2024-06-14 11:31:55,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-06-14 11:31:55,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-14 11:31:55,464 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 173 flow [2024-06-14 11:31:55,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:55,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:55,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:55,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:31:55,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:55,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash -263580670, now seen corresponding path program 1 times [2024-06-14 11:31:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:55,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061837008] [2024-06-14 11:31:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:55,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:55,605 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 11:31:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061837008] [2024-06-14 11:31:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061837008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:55,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:55,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:31:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330820491] [2024-06-14 11:31:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:55,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:31:55,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:31:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:31:55,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:31:55,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:55,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:55,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:31:55,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:55,784 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-14 11:31:55,785 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-14 11:31:55,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1357 events. 789/1357 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7079 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-14 11:31:55,793 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 11:31:55,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 405 flow [2024-06-14 11:31:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:31:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:31:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-14 11:31:55,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-14 11:31:55,797 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 173 flow. Second operand 5 states and 140 transitions. [2024-06-14 11:31:55,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 405 flow [2024-06-14 11:31:55,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 403 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 11:31:55,801 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 248 flow [2024-06-14 11:31:55,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-14 11:31:55,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 11:31:55,802 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 248 flow [2024-06-14 11:31:55,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:55,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:55,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:55,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:31:55,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:55,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash -364981210, now seen corresponding path program 1 times [2024-06-14 11:31:55,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:55,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272506886] [2024-06-14 11:31:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:55,970 INFO 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 11:31:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272506886] [2024-06-14 11:31:55,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272506886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:55,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:31:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795781749] [2024-06-14 11:31:55,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:55,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:31:55,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:31:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:31:55,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:31:55,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 248 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 11:31:55,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:55,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:31:55,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:56,126 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-14 11:31:56,127 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-14 11:31:56,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1297 events. 773/1297 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6615 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-14 11:31:56,133 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-14 11:31:56,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 401 flow [2024-06-14 11:31:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:31:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:31:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-14 11:31:56,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-14 11:31:56,135 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 248 flow. Second operand 4 states and 107 transitions. [2024-06-14 11:31:56,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 401 flow [2024-06-14 11:31:56,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 387 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 11:31:56,141 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 287 flow [2024-06-14 11:31:56,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-14 11:31:56,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-14 11:31:56,142 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 287 flow [2024-06-14 11:31:56,143 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 11:31:56,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:56,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:31:56,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:56,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash -848364989, now seen corresponding path program 1 times [2024-06-14 11:31:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:56,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048139275] [2024-06-14 11:31:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:56,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048139275] [2024-06-14 11:31:56,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048139275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:56,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:56,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:31:56,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392780243] [2024-06-14 11:31:56,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:56,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:31:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:31:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:31:56,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:31:56,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:56,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:56,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:31:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:56,527 INFO L124 PetriNetUnfolderBase]: 781/1330 cut-off events. [2024-06-14 11:31:56,527 INFO L125 PetriNetUnfolderBase]: For 2266/2340 co-relation queries the response was YES. [2024-06-14 11:31:56,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 1330 events. 781/1330 cut-off events. For 2266/2340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6821 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-14 11:31:56,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-14 11:31:56,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 537 flow [2024-06-14 11:31:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:31:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:31:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 11:31:56,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 11:31:56,535 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 287 flow. Second operand 6 states and 162 transitions. [2024-06-14 11:31:56,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 537 flow [2024-06-14 11:31:56,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 527 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-14 11:31:56,538 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 343 flow [2024-06-14 11:31:56,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-14 11:31:56,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-14 11:31:56,539 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 343 flow [2024-06-14 11:31:56,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:56,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:56,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:31:56,540 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 11:31:56,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1570485163, now seen corresponding path program 1 times [2024-06-14 11:31:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:56,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724590615] [2024-06-14 11:31:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:56,672 INFO 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 11:31:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:56,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724590615] [2024-06-14 11:31:56,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724590615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:56,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:56,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:31:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777896849] [2024-06-14 11:31:56,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:56,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:31:56,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:31:56,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:31:56,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:56,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:56,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:56,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:56,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:56,846 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-14 11:31:56,847 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2024-06-14 11:31:56,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1562 events. 955/1562 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7919 event pairs, 342 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 5325. Up to 1371 conditions per place. [2024-06-14 11:31:56,856 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-06-14 11:31:56,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 677 flow [2024-06-14 11:31:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:31:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:31:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 11:31:56,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-14 11:31:56,858 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 343 flow. Second operand 5 states and 128 transitions. [2024-06-14 11:31:56,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 677 flow [2024-06-14 11:31:56,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 615 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:31:56,862 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 446 flow [2024-06-14 11:31:56,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2024-06-14 11:31:56,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-14 11:31:56,863 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 446 flow [2024-06-14 11:31:56,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:56,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:56,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:56,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:31:56,864 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 11:31:56,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1727404290, now seen corresponding path program 1 times [2024-06-14 11:31:56,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:56,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066465311] [2024-06-14 11:31:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:56,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:57,013 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 11:31:57,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066465311] [2024-06-14 11:31:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066465311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:57,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:31:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971105255] [2024-06-14 11:31:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:31:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:31:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:31:57,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:57,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:57,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:57,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:57,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:57,200 INFO L124 PetriNetUnfolderBase]: 966/1590 cut-off events. [2024-06-14 11:31:57,200 INFO L125 PetriNetUnfolderBase]: For 4475/4481 co-relation queries the response was YES. [2024-06-14 11:31:57,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 1590 events. 966/1590 cut-off events. For 4475/4481 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8096 event pairs, 346 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 5769. Up to 1383 conditions per place. [2024-06-14 11:31:57,209 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-14 11:31:57,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 723 flow [2024-06-14 11:31:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:31:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:31:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 11:31:57,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:31:57,210 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 446 flow. Second operand 5 states and 126 transitions. [2024-06-14 11:31:57,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 723 flow [2024-06-14 11:31:57,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 717 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 11:31:57,215 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-14 11:31:57,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-14 11:31:57,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-14 11:31:57,216 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-14 11:31:57,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:57,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:57,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:31:57,217 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:57,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-14 11:31:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:57,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235208605] [2024-06-14 11:31:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:57,323 INFO 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 11:31:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:57,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235208605] [2024-06-14 11:31:57,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235208605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:57,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:57,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:31:57,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106043934] [2024-06-14 11:31:57,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:57,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:31:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:31:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:31:57,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:57,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:57,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:57,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:57,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:57,502 INFO L124 PetriNetUnfolderBase]: 961/1587 cut-off events. [2024-06-14 11:31:57,503 INFO L125 PetriNetUnfolderBase]: For 5423/5429 co-relation queries the response was YES. [2024-06-14 11:31:57,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1587 events. 961/1587 cut-off events. For 5423/5429 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8071 event pairs, 343 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 5992. Up to 1378 conditions per place. [2024-06-14 11:31:57,512 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-14 11:31:57,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 760 flow [2024-06-14 11:31:57,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:31:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:31:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 11:31:57,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-14 11:31:57,513 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 5 states and 129 transitions. [2024-06-14 11:31:57,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 760 flow [2024-06-14 11:31:57,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 741 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 11:31:57,519 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 580 flow [2024-06-14 11:31:57,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 11:31:57,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-14 11:31:57,520 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 580 flow [2024-06-14 11:31:57,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:57,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:57,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:57,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:31:57,521 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 11:31:57,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1702746890, now seen corresponding path program 1 times [2024-06-14 11:31:57,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:57,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571039678] [2024-06-14 11:31:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:57,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:57,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571039678] [2024-06-14 11:31:57,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571039678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:57,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:57,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:31:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364341850] [2024-06-14 11:31:57,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:57,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:31:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:31:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:31:57,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:57,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:57,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:57,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:57,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:57,873 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-14 11:31:57,873 INFO L125 PetriNetUnfolderBase]: For 6620/6620 co-relation queries the response was YES. [2024-06-14 11:31:57,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1591 events. 970/1591 cut-off events. For 6620/6620 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8073 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6197. Up to 1357 conditions per place. [2024-06-14 11:31:57,882 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-14 11:31:57,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 834 flow [2024-06-14 11:31:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:31:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:31:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:31:57,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 11:31:57,884 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 580 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:31:57,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 834 flow [2024-06-14 11:31:57,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:31:57,892 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 634 flow [2024-06-14 11:31:57,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-14 11:31:57,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-14 11:31:57,893 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 634 flow [2024-06-14 11:31:57,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:57,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:57,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:57,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:31:57,893 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 11:31:57,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash -512207174, now seen corresponding path program 1 times [2024-06-14 11:31:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:57,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848886596] [2024-06-14 11:31:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:57,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:58,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:58,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848886596] [2024-06-14 11:31:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848886596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:58,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:31:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044587343] [2024-06-14 11:31:58,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:31:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:31:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:31:58,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:31:58,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 634 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 11:31:58,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:58,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:31:58,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:58,237 INFO L124 PetriNetUnfolderBase]: 925/1553 cut-off events. [2024-06-14 11:31:58,238 INFO L125 PetriNetUnfolderBase]: For 8783/8816 co-relation queries the response was YES. [2024-06-14 11:31:58,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 1553 events. 925/1553 cut-off events. For 8783/8816 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8064 event pairs, 286 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6451. Up to 1266 conditions per place. [2024-06-14 11:31:58,248 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-14 11:31:58,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 944 flow [2024-06-14 11:31:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:31:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:31:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 11:31:58,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-14 11:31:58,250 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 634 flow. Second operand 6 states and 160 transitions. [2024-06-14 11:31:58,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 944 flow [2024-06-14 11:31:58,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 890 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:31:58,260 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 656 flow [2024-06-14 11:31:58,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=656, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-14 11:31:58,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-14 11:31:58,261 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 656 flow [2024-06-14 11:31:58,261 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 11:31:58,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:58,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:31:58,261 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 11:31:58,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash 727180166, now seen corresponding path program 2 times [2024-06-14 11:31:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234974171] [2024-06-14 11:31:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:58,376 INFO 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 11:31:58,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:58,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234974171] [2024-06-14 11:31:58,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234974171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:58,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:58,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:31:58,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520740783] [2024-06-14 11:31:58,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:58,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:31:58,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:31:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:31:58,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:31:58,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 656 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:58,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:58,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:31:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:58,576 INFO L124 PetriNetUnfolderBase]: 934/1551 cut-off events. [2024-06-14 11:31:58,576 INFO L125 PetriNetUnfolderBase]: For 9905/9933 co-relation queries the response was YES. [2024-06-14 11:31:58,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6635 conditions, 1551 events. 934/1551 cut-off events. For 9905/9933 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8089 event pairs, 296 based on Foata normal form. 21/1513 useless extension candidates. Maximal degree in co-relation 6595. Up to 1283 conditions per place. [2024-06-14 11:31:58,592 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-14 11:31:58,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 98 transitions, 860 flow [2024-06-14 11:31:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:31:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:31:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:31:58,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 11:31:58,594 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 656 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:31:58,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 98 transitions, 860 flow [2024-06-14 11:31:58,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 804 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:31:58,606 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 661 flow [2024-06-14 11:31:58,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-14 11:31:58,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-14 11:31:58,607 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 661 flow [2024-06-14 11:31:58,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:58,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:58,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:58,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:31:58,608 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 11:31:58,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash 433892943, now seen corresponding path program 1 times [2024-06-14 11:31:58,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:58,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021376154] [2024-06-14 11:31:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:58,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:58,738 INFO 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 11:31:58,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021376154] [2024-06-14 11:31:58,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021376154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:58,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:58,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:31:58,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653524050] [2024-06-14 11:31:58,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:58,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:31:58,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:58,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:31:58,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:31:58,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:58,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:58,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:58,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:58,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:58,957 INFO L124 PetriNetUnfolderBase]: 1005/1661 cut-off events. [2024-06-14 11:31:58,957 INFO L125 PetriNetUnfolderBase]: For 10378/10384 co-relation queries the response was YES. [2024-06-14 11:31:58,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 1661 events. 1005/1661 cut-off events. For 10378/10384 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8502 event pairs, 317 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 6939. Up to 1356 conditions per place. [2024-06-14 11:31:58,968 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-14 11:31:58,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1185 flow [2024-06-14 11:31:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:31:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:31:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:31:58,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 11:31:58,970 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 661 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:31:58,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1185 flow [2024-06-14 11:31:58,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 1104 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:31:58,982 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 785 flow [2024-06-14 11:31:58,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-14 11:31:58,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 11:31:58,983 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 785 flow [2024-06-14 11:31:58,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:58,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:58,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:58,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:31:58,984 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 11:31:58,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1067956841, now seen corresponding path program 2 times [2024-06-14 11:31:58,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:58,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651849321] [2024-06-14 11:31:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:58,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:59,100 INFO 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 11:31:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651849321] [2024-06-14 11:31:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651849321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:59,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:59,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:31:59,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318457243] [2024-06-14 11:31:59,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:59,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:31:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:31:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:31:59,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:59,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 785 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:59,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:59,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:59,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:59,317 INFO L124 PetriNetUnfolderBase]: 1016/1663 cut-off events. [2024-06-14 11:31:59,318 INFO L125 PetriNetUnfolderBase]: For 12195/12195 co-relation queries the response was YES. [2024-06-14 11:31:59,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7519 conditions, 1663 events. 1016/1663 cut-off events. For 12195/12195 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8484 event pairs, 327 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 7475. Up to 1368 conditions per place. [2024-06-14 11:31:59,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 36 changer transitions 0/127 dead transitions. [2024-06-14 11:31:59,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1219 flow [2024-06-14 11:31:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:31:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:31:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 11:31:59,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-14 11:31:59,330 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 785 flow. Second operand 6 states and 154 transitions. [2024-06-14 11:31:59,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1219 flow [2024-06-14 11:31:59,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 127 transitions, 1191 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 11:31:59,343 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 888 flow [2024-06-14 11:31:59,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=888, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-14 11:31:59,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-14 11:31:59,344 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 888 flow [2024-06-14 11:31:59,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:59,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:59,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:59,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:31:59,345 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 11:31:59,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2100041855, now seen corresponding path program 3 times [2024-06-14 11:31:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:59,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759441714] [2024-06-14 11:31:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:59,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:59,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759441714] [2024-06-14 11:31:59,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759441714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:59,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:59,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:31:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512215253] [2024-06-14 11:31:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:31:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:31:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:31:59,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:59,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 888 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:59,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:59,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:59,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:59,676 INFO L124 PetriNetUnfolderBase]: 1011/1656 cut-off events. [2024-06-14 11:31:59,676 INFO L125 PetriNetUnfolderBase]: For 13743/13743 co-relation queries the response was YES. [2024-06-14 11:31:59,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7765 conditions, 1656 events. 1011/1656 cut-off events. For 13743/13743 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8468 event pairs, 327 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 7717. Up to 1363 conditions per place. [2024-06-14 11:31:59,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 35 changer transitions 0/125 dead transitions. [2024-06-14 11:31:59,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 125 transitions, 1233 flow [2024-06-14 11:31:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:31:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:31:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:31:59,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-14 11:31:59,688 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 888 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:31:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 125 transitions, 1233 flow [2024-06-14 11:31:59,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 125 transitions, 1176 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-14 11:31:59,703 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 909 flow [2024-06-14 11:31:59,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-14 11:31:59,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-14 11:31:59,703 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 909 flow [2024-06-14 11:31:59,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:59,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:59,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:31:59,704 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 11:31:59,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:59,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1484241943, now seen corresponding path program 4 times [2024-06-14 11:31:59,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76973198] [2024-06-14 11:31:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:59,810 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 11:31:59,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:59,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76973198] [2024-06-14 11:31:59,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76973198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:59,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:59,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:31:59,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505497169] [2024-06-14 11:31:59,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:59,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:31:59,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:31:59,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:31:59,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:31:59,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 909 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:59,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:59,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:31:59,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:00,071 INFO L124 PetriNetUnfolderBase]: 1022/1697 cut-off events. [2024-06-14 11:32:00,071 INFO L125 PetriNetUnfolderBase]: For 15762/15768 co-relation queries the response was YES. [2024-06-14 11:32:00,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 1697 events. 1022/1697 cut-off events. For 15762/15768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8779 event pairs, 329 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7955. Up to 1375 conditions per place. [2024-06-14 11:32:00,083 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 39 changer transitions 0/134 dead transitions. [2024-06-14 11:32:00,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1317 flow [2024-06-14 11:32:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 11:32:00,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-14 11:32:00,085 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 909 flow. Second operand 6 states and 158 transitions. [2024-06-14 11:32:00,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1317 flow [2024-06-14 11:32:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1217 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:00,107 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 936 flow [2024-06-14 11:32:00,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=936, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-14 11:32:00,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 11:32:00,108 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 936 flow [2024-06-14 11:32:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:00,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:00,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:32:00,109 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:00,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash -52293399, now seen corresponding path program 5 times [2024-06-14 11:32:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471918833] [2024-06-14 11:32:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:00,220 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 11:32:00,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:00,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471918833] [2024-06-14 11:32:00,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471918833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:00,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:00,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:00,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231032966] [2024-06-14 11:32:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:00,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:00,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 936 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:00,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:00,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:00,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:00,448 INFO L124 PetriNetUnfolderBase]: 1033/1708 cut-off events. [2024-06-14 11:32:00,448 INFO L125 PetriNetUnfolderBase]: For 17704/17710 co-relation queries the response was YES. [2024-06-14 11:32:00,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8261 conditions, 1708 events. 1033/1708 cut-off events. For 17704/17710 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8865 event pairs, 331 based on Foata normal form. 6/1702 useless extension candidates. Maximal degree in co-relation 8211. Up to 1387 conditions per place. [2024-06-14 11:32:00,460 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 41 changer transitions 0/132 dead transitions. [2024-06-14 11:32:00,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 132 transitions, 1336 flow [2024-06-14 11:32:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:32:00,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 11:32:00,462 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 936 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:32:00,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 132 transitions, 1336 flow [2024-06-14 11:32:00,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 132 transitions, 1248 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:00,483 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 976 flow [2024-06-14 11:32:00,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=976, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-14 11:32:00,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-14 11:32:00,484 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 976 flow [2024-06-14 11:32:00,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:00,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:00,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:00,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:32:00,485 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:00,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -308793909, now seen corresponding path program 6 times [2024-06-14 11:32:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302301327] [2024-06-14 11:32:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:00,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:00,586 INFO 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 11:32:00,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:00,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302301327] [2024-06-14 11:32:00,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302301327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:00,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:00,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834198656] [2024-06-14 11:32:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:00,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:00,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 976 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:00,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:00,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:00,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:00,845 INFO L124 PetriNetUnfolderBase]: 1028/1711 cut-off events. [2024-06-14 11:32:00,845 INFO L125 PetriNetUnfolderBase]: For 18813/18819 co-relation queries the response was YES. [2024-06-14 11:32:00,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8314 conditions, 1711 events. 1028/1711 cut-off events. For 18813/18819 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8837 event pairs, 329 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8263. Up to 1382 conditions per place. [2024-06-14 11:32:00,858 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-14 11:32:00,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1284 flow [2024-06-14 11:32:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:32:00,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 11:32:00,860 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 976 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:32:00,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1284 flow [2024-06-14 11:32:00,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1236 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:00,885 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 1020 flow [2024-06-14 11:32:00,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-14 11:32:00,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-14 11:32:00,885 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 1020 flow [2024-06-14 11:32:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:00,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:00,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:32:00,886 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:00,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash -52285463, now seen corresponding path program 1 times [2024-06-14 11:32:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:00,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425211931] [2024-06-14 11:32:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:00,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425211931] [2024-06-14 11:32:00,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425211931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:00,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:00,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:00,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731975847] [2024-06-14 11:32:00,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:00,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:00,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:01,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 1020 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:01,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:01,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:01,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:01,250 INFO L124 PetriNetUnfolderBase]: 1045/1738 cut-off events. [2024-06-14 11:32:01,251 INFO L125 PetriNetUnfolderBase]: For 21715/21721 co-relation queries the response was YES. [2024-06-14 11:32:01,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8563 conditions, 1738 events. 1045/1738 cut-off events. For 21715/21721 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9056 event pairs, 317 based on Foata normal form. 8/1738 useless extension candidates. Maximal degree in co-relation 8510. Up to 1487 conditions per place. [2024-06-14 11:32:01,261 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 106 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-06-14 11:32:01,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1338 flow [2024-06-14 11:32:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:32:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-14 11:32:01,262 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 1020 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:32:01,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1338 flow [2024-06-14 11:32:01,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1248 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:01,287 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 997 flow [2024-06-14 11:32:01,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=997, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2024-06-14 11:32:01,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-14 11:32:01,288 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 997 flow [2024-06-14 11:32:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:01,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:01,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:01,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:32:01,288 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 11:32:01,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -42762263, now seen corresponding path program 2 times [2024-06-14 11:32:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537170027] [2024-06-14 11:32:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:01,394 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 11:32:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537170027] [2024-06-14 11:32:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537170027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:01,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:01,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:01,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429951880] [2024-06-14 11:32:01,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:01,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:01,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 997 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:01,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:01,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:01,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:01,610 INFO L124 PetriNetUnfolderBase]: 1062/1764 cut-off events. [2024-06-14 11:32:01,610 INFO L125 PetriNetUnfolderBase]: For 24140/24146 co-relation queries the response was YES. [2024-06-14 11:32:01,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1764 events. 1062/1764 cut-off events. For 24140/24146 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9231 event pairs, 288 based on Foata normal form. 8/1764 useless extension candidates. Maximal degree in co-relation 8778. Up to 1431 conditions per place. [2024-06-14 11:32:01,624 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 107 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-14 11:32:01,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 1431 flow [2024-06-14 11:32:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:32:01,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 11:32:01,625 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 997 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:32:01,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 1431 flow [2024-06-14 11:32:01,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 140 transitions, 1382 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:01,651 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1051 flow [2024-06-14 11:32:01,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1051, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-14 11:32:01,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-14 11:32:01,652 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1051 flow [2024-06-14 11:32:01,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:01,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:01,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:32:01,653 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 11:32:01,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -308785973, now seen corresponding path program 3 times [2024-06-14 11:32:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:01,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044899541] [2024-06-14 11:32:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:01,761 INFO 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 11:32:01,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:01,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044899541] [2024-06-14 11:32:01,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044899541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:01,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:01,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:01,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729778153] [2024-06-14 11:32:01,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:01,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:01,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1051 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:01,978 INFO L124 PetriNetUnfolderBase]: 1054/1757 cut-off events. [2024-06-14 11:32:01,979 INFO L125 PetriNetUnfolderBase]: For 25518/25524 co-relation queries the response was YES. [2024-06-14 11:32:01,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8949 conditions, 1757 events. 1054/1757 cut-off events. For 25518/25524 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9167 event pairs, 312 based on Foata normal form. 4/1754 useless extension candidates. Maximal degree in co-relation 8894. Up to 1502 conditions per place. [2024-06-14 11:32:01,992 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 111 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-14 11:32:01,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1375 flow [2024-06-14 11:32:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:32:01,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:32:01,993 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1051 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:32:01,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1375 flow [2024-06-14 11:32:02,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1332 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:02,027 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1059 flow [2024-06-14 11:32:02,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1059, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-14 11:32:02,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-14 11:32:02,028 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1059 flow [2024-06-14 11:32:02,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:02,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:02,028 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 11:32:02,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:32:02,029 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 11:32:02,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:02,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1791327585, now seen corresponding path program 1 times [2024-06-14 11:32:02,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:02,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788458349] [2024-06-14 11:32:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:02,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:02,161 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 11:32:02,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:02,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788458349] [2024-06-14 11:32:02,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788458349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:02,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551976167] [2024-06-14 11:32:02,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:02,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:02,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:32:02,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1059 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 11:32:02,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:02,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:32:02,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:02,459 INFO L124 PetriNetUnfolderBase]: 1055/1778 cut-off events. [2024-06-14 11:32:02,459 INFO L125 PetriNetUnfolderBase]: For 31076/31098 co-relation queries the response was YES. [2024-06-14 11:32:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9364 conditions, 1778 events. 1055/1778 cut-off events. For 31076/31098 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9521 event pairs, 183 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9307. Up to 1341 conditions per place. [2024-06-14 11:32:02,471 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 40 changer transitions 0/158 dead transitions. [2024-06-14 11:32:02,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 158 transitions, 1525 flow [2024-06-14 11:32:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:32:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:32:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 11:32:02,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-14 11:32:02,472 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1059 flow. Second operand 8 states and 205 transitions. [2024-06-14 11:32:02,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 158 transitions, 1525 flow [2024-06-14 11:32:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 1476 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:02,509 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1133 flow [2024-06-14 11:32:02,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1133, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-14 11:32:02,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-14 11:32:02,510 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1133 flow [2024-06-14 11:32:02,510 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 11:32:02,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:02,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:32:02,511 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 11:32:02,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1794184545, now seen corresponding path program 2 times [2024-06-14 11:32:02,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:02,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623899271] [2024-06-14 11:32:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:02,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:02,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:02,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623899271] [2024-06-14 11:32:02,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623899271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:02,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:02,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762908928] [2024-06-14 11:32:02,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:02,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:02,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:32:02,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1133 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 11:32:02,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:02,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:32:02,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:02,928 INFO L124 PetriNetUnfolderBase]: 1043/1758 cut-off events. [2024-06-14 11:32:02,928 INFO L125 PetriNetUnfolderBase]: For 33127/33154 co-relation queries the response was YES. [2024-06-14 11:32:02,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9503 conditions, 1758 events. 1043/1758 cut-off events. For 33127/33154 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9421 event pairs, 250 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9445. Up to 1409 conditions per place. [2024-06-14 11:32:02,945 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 35 changer transitions 0/151 dead transitions. [2024-06-14 11:32:02,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 151 transitions, 1457 flow [2024-06-14 11:32:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:32:02,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-14 11:32:02,947 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1133 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:32:02,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 151 transitions, 1457 flow [2024-06-14 11:32:02,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 151 transitions, 1394 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:02,987 INFO L231 Difference]: Finished difference. Result has 120 places, 121 transitions, 1148 flow [2024-06-14 11:32:02,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=120, PETRI_TRANSITIONS=121} [2024-06-14 11:32:02,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 11:32:02,987 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 121 transitions, 1148 flow [2024-06-14 11:32:02,987 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 11:32:02,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:02,988 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 11:32:02,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:32:02,988 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 11:32:02,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1545242789, now seen corresponding path program 3 times [2024-06-14 11:32:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:02,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364992767] [2024-06-14 11:32:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:03,106 INFO 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 11:32:03,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364992767] [2024-06-14 11:32:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364992767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:03,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:03,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297195098] [2024-06-14 11:32:03,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:03,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:03,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:03,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:32:03,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 121 transitions, 1148 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:32:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:03,329 INFO L124 PetriNetUnfolderBase]: 1035/1730 cut-off events. [2024-06-14 11:32:03,329 INFO L125 PetriNetUnfolderBase]: For 34715/34736 co-relation queries the response was YES. [2024-06-14 11:32:03,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9496 conditions, 1730 events. 1035/1730 cut-off events. For 34715/34736 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9217 event pairs, 255 based on Foata normal form. 6/1667 useless extension candidates. Maximal degree in co-relation 9436. Up to 1397 conditions per place. [2024-06-14 11:32:03,344 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 81 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-14 11:32:03,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 143 transitions, 1450 flow [2024-06-14 11:32:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:32:03,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-14 11:32:03,347 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 1148 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:32:03,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 143 transitions, 1450 flow [2024-06-14 11:32:03,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 143 transitions, 1371 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:03,383 INFO L231 Difference]: Finished difference. Result has 120 places, 123 transitions, 1171 flow [2024-06-14 11:32:03,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1171, PETRI_PLACES=120, PETRI_TRANSITIONS=123} [2024-06-14 11:32:03,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 11:32:03,384 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 123 transitions, 1171 flow [2024-06-14 11:32:03,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:03,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:03,386 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 11:32:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:32:03,386 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:03,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1063539590, now seen corresponding path program 1 times [2024-06-14 11:32:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435765385] [2024-06-14 11:32:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:03,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435765385] [2024-06-14 11:32:03,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435765385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:03,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:03,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571951504] [2024-06-14 11:32:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:03,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:03,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 1171 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:03,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:03,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:03,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:03,770 INFO L124 PetriNetUnfolderBase]: 1119/1867 cut-off events. [2024-06-14 11:32:03,770 INFO L125 PetriNetUnfolderBase]: For 33849/33855 co-relation queries the response was YES. [2024-06-14 11:32:03,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 1867 events. 1119/1867 cut-off events. For 33849/33855 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9842 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 10022. Up to 1590 conditions per place. [2024-06-14 11:32:03,785 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2024-06-14 11:32:03,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 157 transitions, 1770 flow [2024-06-14 11:32:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:32:03,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 11:32:03,787 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 1171 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:32:03,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 157 transitions, 1770 flow [2024-06-14 11:32:03,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 157 transitions, 1682 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:03,824 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1358 flow [2024-06-14 11:32:03,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1358, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-14 11:32:03,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-14 11:32:03,825 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1358 flow [2024-06-14 11:32:03,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:03,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:03,825 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 11:32:03,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:32:03,825 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:03,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash -535610012, now seen corresponding path program 2 times [2024-06-14 11:32:03,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:03,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422050789] [2024-06-14 11:32:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:03,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:03,949 INFO 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 11:32:03,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:03,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422050789] [2024-06-14 11:32:03,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422050789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:03,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:03,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:03,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200272051] [2024-06-14 11:32:03,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:03,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:03,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:04,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:04,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1358 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:04,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:04,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:04,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:04,227 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-14 11:32:04,227 INFO L125 PetriNetUnfolderBase]: For 36865/36865 co-relation queries the response was YES. [2024-06-14 11:32:04,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10725 conditions, 1909 events. 1147/1909 cut-off events. For 36865/36865 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10048 event pairs, 270 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 10661. Up to 1648 conditions per place. [2024-06-14 11:32:04,241 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 34 changer transitions 0/166 dead transitions. [2024-06-14 11:32:04,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 166 transitions, 1869 flow [2024-06-14 11:32:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 11:32:04,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-14 11:32:04,242 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1358 flow. Second operand 5 states and 132 transitions. [2024-06-14 11:32:04,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 166 transitions, 1869 flow [2024-06-14 11:32:04,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 166 transitions, 1831 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:04,282 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1542 flow [2024-06-14 11:32:04,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1542, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-14 11:32:04,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-14 11:32:04,283 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1542 flow [2024-06-14 11:32:04,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:04,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:04,283 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 11:32:04,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:32:04,284 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:04,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash -503881202, now seen corresponding path program 3 times [2024-06-14 11:32:04,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:04,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567491394] [2024-06-14 11:32:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:04,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:04,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:04,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567491394] [2024-06-14 11:32:04,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567491394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:04,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:04,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:04,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918857835] [2024-06-14 11:32:04,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:04,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:04,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:04,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:04,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:04,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1542 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:04,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:04,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:04,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:04,662 INFO L124 PetriNetUnfolderBase]: 1149/1917 cut-off events. [2024-06-14 11:32:04,662 INFO L125 PetriNetUnfolderBase]: For 40292/40298 co-relation queries the response was YES. [2024-06-14 11:32:04,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 1917 events. 1149/1917 cut-off events. For 40292/40298 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10154 event pairs, 282 based on Foata normal form. 6/1918 useless extension candidates. Maximal degree in co-relation 10950. Up to 1622 conditions per place. [2024-06-14 11:32:04,717 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 115 selfloop transitions, 45 changer transitions 0/167 dead transitions. [2024-06-14 11:32:04,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 167 transitions, 2044 flow [2024-06-14 11:32:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:32:04,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 11:32:04,719 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1542 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:32:04,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 167 transitions, 2044 flow [2024-06-14 11:32:04,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1999 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:04,788 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1639 flow [2024-06-14 11:32:04,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1639, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-14 11:32:04,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-14 11:32:04,789 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1639 flow [2024-06-14 11:32:04,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:04,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:04,789 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 11:32:04,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:32:04,790 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:04,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash 236855980, now seen corresponding path program 1 times [2024-06-14 11:32:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:04,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733315882] [2024-06-14 11:32:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:04,931 INFO 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 11:32:04,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:04,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733315882] [2024-06-14 11:32:04,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733315882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:04,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:04,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:04,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463218359] [2024-06-14 11:32:04,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:04,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:04,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:04,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:04,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:04,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1639 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:04,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:04,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:04,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:05,214 INFO L124 PetriNetUnfolderBase]: 1167/1944 cut-off events. [2024-06-14 11:32:05,214 INFO L125 PetriNetUnfolderBase]: For 44384/44384 co-relation queries the response was YES. [2024-06-14 11:32:05,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11360 conditions, 1944 events. 1167/1944 cut-off events. For 44384/44384 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10349 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11291. Up to 1629 conditions per place. [2024-06-14 11:32:05,230 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-14 11:32:05,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 179 transitions, 2247 flow [2024-06-14 11:32:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:32:05,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 11:32:05,231 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1639 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:32:05,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 179 transitions, 2247 flow [2024-06-14 11:32:05,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 2143 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:05,293 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1746 flow [2024-06-14 11:32:05,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-06-14 11:32:05,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 11:32:05,294 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1746 flow [2024-06-14 11:32:05,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:05,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:05,294 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 11:32:05,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:32:05,294 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:05,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-14 11:32:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:05,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81711081] [2024-06-14 11:32:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:05,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:05,397 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 11:32:05,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:05,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81711081] [2024-06-14 11:32:05,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81711081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:05,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:05,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:05,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825973251] [2024-06-14 11:32:05,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:05,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:05,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:05,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:05,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:05,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1746 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:05,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:05,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:05,660 INFO L124 PetriNetUnfolderBase]: 1187/1976 cut-off events. [2024-06-14 11:32:05,661 INFO L125 PetriNetUnfolderBase]: For 45402/45402 co-relation queries the response was YES. [2024-06-14 11:32:05,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11773 conditions, 1976 events. 1187/1976 cut-off events. For 45402/45402 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10486 event pairs, 288 based on Foata normal form. 2/1971 useless extension candidates. Maximal degree in co-relation 11704. Up to 1663 conditions per place. [2024-06-14 11:32:05,675 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-14 11:32:05,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 184 transitions, 2370 flow [2024-06-14 11:32:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:32:05,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 11:32:05,676 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1746 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:32:05,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 184 transitions, 2370 flow [2024-06-14 11:32:05,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 2308 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-14 11:32:05,747 INFO L231 Difference]: Finished difference. Result has 142 places, 169 transitions, 1932 flow [2024-06-14 11:32:05,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1932, PETRI_PLACES=142, PETRI_TRANSITIONS=169} [2024-06-14 11:32:05,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-14 11:32:05,748 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 169 transitions, 1932 flow [2024-06-14 11:32:05,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:05,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:05,749 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 11:32:05,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:32:05,749 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:05,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432434, now seen corresponding path program 2 times [2024-06-14 11:32:05,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:05,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546856008] [2024-06-14 11:32:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:05,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:05,860 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 11:32:05,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:05,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546856008] [2024-06-14 11:32:05,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546856008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:05,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:05,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:05,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063955008] [2024-06-14 11:32:05,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:05,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:05,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:05,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:05,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 169 transitions, 1932 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:05,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:05,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:05,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:06,116 INFO L124 PetriNetUnfolderBase]: 1197/1997 cut-off events. [2024-06-14 11:32:06,117 INFO L125 PetriNetUnfolderBase]: For 48702/48702 co-relation queries the response was YES. [2024-06-14 11:32:06,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12081 conditions, 1997 events. 1197/1997 cut-off events. For 48702/48702 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10684 event pairs, 280 based on Foata normal form. 2/1992 useless extension candidates. Maximal degree in co-relation 12008. Up to 1726 conditions per place. [2024-06-14 11:32:06,130 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 148 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-14 11:32:06,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 2360 flow [2024-06-14 11:32:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:32:06,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 11:32:06,132 INFO L175 Difference]: Start difference. First operand has 142 places, 169 transitions, 1932 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:32:06,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 2360 flow [2024-06-14 11:32:06,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 2214 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:06,211 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1901 flow [2024-06-14 11:32:06,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1901, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-14 11:32:06,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 11:32:06,212 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1901 flow [2024-06-14 11:32:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:06,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:06,212 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 11:32:06,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:32:06,213 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:06,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 2 times [2024-06-14 11:32:06,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:06,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912783694] [2024-06-14 11:32:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:06,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:06,317 INFO 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 11:32:06,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:06,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912783694] [2024-06-14 11:32:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912783694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:06,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:06,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391997044] [2024-06-14 11:32:06,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:06,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:06,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:06,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1901 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:06,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:06,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:06,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:06,583 INFO L124 PetriNetUnfolderBase]: 1189/1992 cut-off events. [2024-06-14 11:32:06,583 INFO L125 PetriNetUnfolderBase]: For 49075/49075 co-relation queries the response was YES. [2024-06-14 11:32:06,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11967 conditions, 1992 events. 1189/1992 cut-off events. For 49075/49075 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10631 event pairs, 266 based on Foata normal form. 2/1991 useless extension candidates. Maximal degree in co-relation 11894. Up to 1706 conditions per place. [2024-06-14 11:32:06,597 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-14 11:32:06,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 191 transitions, 2315 flow [2024-06-14 11:32:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 11:32:06,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-14 11:32:06,599 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1901 flow. Second operand 5 states and 131 transitions. [2024-06-14 11:32:06,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 191 transitions, 2315 flow [2024-06-14 11:32:06,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 191 transitions, 2210 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:06,667 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1896 flow [2024-06-14 11:32:06,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1896, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-14 11:32:06,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 11:32:06,667 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1896 flow [2024-06-14 11:32:06,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:06,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:06,668 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 11:32:06,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:32:06,668 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:06,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash -497410014, now seen corresponding path program 3 times [2024-06-14 11:32:06,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:06,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303301414] [2024-06-14 11:32:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:06,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:06,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:06,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303301414] [2024-06-14 11:32:06,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303301414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:06,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:06,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234538782] [2024-06-14 11:32:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:06,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:06,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:06,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1896 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:06,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:06,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:06,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:07,076 INFO L124 PetriNetUnfolderBase]: 1191/1988 cut-off events. [2024-06-14 11:32:07,076 INFO L125 PetriNetUnfolderBase]: For 52884/52884 co-relation queries the response was YES. [2024-06-14 11:32:07,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12070 conditions, 1988 events. 1191/1988 cut-off events. For 52884/52884 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10657 event pairs, 280 based on Foata normal form. 2/1983 useless extension candidates. Maximal degree in co-relation 11997. Up to 1666 conditions per place. [2024-06-14 11:32:07,096 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 142 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-06-14 11:32:07,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2420 flow [2024-06-14 11:32:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:32:07,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:32:07,098 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1896 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:32:07,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2420 flow [2024-06-14 11:32:07,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 196 transitions, 2332 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:07,190 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1978 flow [2024-06-14 11:32:07,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1978, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-14 11:32:07,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-14 11:32:07,190 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1978 flow [2024-06-14 11:32:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:07,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:07,191 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 11:32:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:32:07,191 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:07,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash -535840218, now seen corresponding path program 3 times [2024-06-14 11:32:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:07,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745142838] [2024-06-14 11:32:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:07,293 INFO 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 11:32:07,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:07,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745142838] [2024-06-14 11:32:07,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745142838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:07,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:07,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:07,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580338320] [2024-06-14 11:32:07,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:07,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:07,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:07,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:07,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:07,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:07,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1978 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:07,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:07,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:07,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:07,560 INFO L124 PetriNetUnfolderBase]: 1193/1992 cut-off events. [2024-06-14 11:32:07,561 INFO L125 PetriNetUnfolderBase]: For 55638/55638 co-relation queries the response was YES. [2024-06-14 11:32:07,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12283 conditions, 1992 events. 1193/1992 cut-off events. For 55638/55638 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10664 event pairs, 288 based on Foata normal form. 2/1987 useless extension candidates. Maximal degree in co-relation 12208. Up to 1676 conditions per place. [2024-06-14 11:32:07,576 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 55 changer transitions 0/193 dead transitions. [2024-06-14 11:32:07,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 193 transitions, 2547 flow [2024-06-14 11:32:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 11:32:07,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-14 11:32:07,578 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1978 flow. Second operand 5 states and 127 transitions. [2024-06-14 11:32:07,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 193 transitions, 2547 flow [2024-06-14 11:32:07,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 193 transitions, 2452 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:07,684 INFO L231 Difference]: Finished difference. Result has 149 places, 179 transitions, 2052 flow [2024-06-14 11:32:07,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2052, PETRI_PLACES=149, PETRI_TRANSITIONS=179} [2024-06-14 11:32:07,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-14 11:32:07,685 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 179 transitions, 2052 flow [2024-06-14 11:32:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:07,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:07,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:07,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:32:07,686 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 11:32:07,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-14 11:32:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926618087] [2024-06-14 11:32:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926618087] [2024-06-14 11:32:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926618087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662927078] [2024-06-14 11:32:07,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:07,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:07,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 11:32:07,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 179 transitions, 2052 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 11:32:07,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:07,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 11:32:07,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:08,032 INFO L124 PetriNetUnfolderBase]: 1129/1936 cut-off events. [2024-06-14 11:32:08,033 INFO L125 PetriNetUnfolderBase]: For 52808/52808 co-relation queries the response was YES. [2024-06-14 11:32:08,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1936 events. 1129/1936 cut-off events. For 52808/52808 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10581 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11764. Up to 1588 conditions per place. [2024-06-14 11:32:08,048 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 146 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-06-14 11:32:08,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 190 transitions, 2410 flow [2024-06-14 11:32:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:32:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:32:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 11:32:08,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 11:32:08,049 INFO L175 Difference]: Start difference. First operand has 149 places, 179 transitions, 2052 flow. Second operand 4 states and 101 transitions. [2024-06-14 11:32:08,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 190 transitions, 2410 flow [2024-06-14 11:32:08,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 190 transitions, 2292 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:08,163 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 1987 flow [2024-06-14 11:32:08,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1987, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-14 11:32:08,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 11:32:08,164 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 1987 flow [2024-06-14 11:32:08,164 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 11:32:08,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:08,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:08,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:32:08,165 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:08,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash -303418928, now seen corresponding path program 1 times [2024-06-14 11:32:08,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:08,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347568290] [2024-06-14 11:32:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:08,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:08,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:08,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347568290] [2024-06-14 11:32:08,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347568290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:08,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:08,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:08,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318795199] [2024-06-14 11:32:08,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:08,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:08,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 1987 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:08,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:08,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:08,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:08,655 INFO L124 PetriNetUnfolderBase]: 1315/2218 cut-off events. [2024-06-14 11:32:08,655 INFO L125 PetriNetUnfolderBase]: For 64395/64401 co-relation queries the response was YES. [2024-06-14 11:32:08,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13291 conditions, 2218 events. 1315/2218 cut-off events. For 64395/64401 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12281 event pairs, 224 based on Foata normal form. 12/2223 useless extension candidates. Maximal degree in co-relation 13215. Up to 1496 conditions per place. [2024-06-14 11:32:08,671 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 47 changer transitions 0/235 dead transitions. [2024-06-14 11:32:08,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 235 transitions, 2736 flow [2024-06-14 11:32:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:32:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:32:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 11:32:08,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-14 11:32:08,672 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 1987 flow. Second operand 9 states and 227 transitions. [2024-06-14 11:32:08,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 235 transitions, 2736 flow [2024-06-14 11:32:08,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 235 transitions, 2699 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:08,772 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2118 flow [2024-06-14 11:32:08,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2118, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-14 11:32:08,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-14 11:32:08,773 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2118 flow [2024-06-14 11:32:08,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:08,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:08,773 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 11:32:08,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:32:08,773 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:08,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 2 times [2024-06-14 11:32:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131659693] [2024-06-14 11:32:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:08,895 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 11:32:08,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:08,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131659693] [2024-06-14 11:32:08,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131659693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:08,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:08,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:08,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154663608] [2024-06-14 11:32:08,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:08,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:08,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:08,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:08,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2118 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:08,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:08,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:08,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:09,332 INFO L124 PetriNetUnfolderBase]: 1373/2326 cut-off events. [2024-06-14 11:32:09,332 INFO L125 PetriNetUnfolderBase]: For 70693/70699 co-relation queries the response was YES. [2024-06-14 11:32:09,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14099 conditions, 2326 events. 1373/2326 cut-off events. For 70693/70699 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13085 event pairs, 329 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 14020. Up to 1838 conditions per place. [2024-06-14 11:32:09,353 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 44 changer transitions 0/224 dead transitions. [2024-06-14 11:32:09,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 224 transitions, 2669 flow [2024-06-14 11:32:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:32:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:32:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:32:09,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:32:09,355 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2118 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:32:09,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 224 transitions, 2669 flow [2024-06-14 11:32:09,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2599 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:09,471 INFO L231 Difference]: Finished difference. Result has 163 places, 187 transitions, 2160 flow [2024-06-14 11:32:09,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2160, PETRI_PLACES=163, PETRI_TRANSITIONS=187} [2024-06-14 11:32:09,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 11:32:09,471 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 187 transitions, 2160 flow [2024-06-14 11:32:09,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:09,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:09,472 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 11:32:09,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:32:09,472 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:09,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 3 times [2024-06-14 11:32:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:09,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796409918] [2024-06-14 11:32:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:09,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:09,654 INFO 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 11:32:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:09,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796409918] [2024-06-14 11:32:09,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796409918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:09,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:09,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:09,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438327797] [2024-06-14 11:32:09,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:09,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:09,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:09,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:09,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 187 transitions, 2160 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:09,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:09,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:09,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:10,060 INFO L124 PetriNetUnfolderBase]: 1414/2407 cut-off events. [2024-06-14 11:32:10,060 INFO L125 PetriNetUnfolderBase]: For 73375/73381 co-relation queries the response was YES. [2024-06-14 11:32:10,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14603 conditions, 2407 events. 1414/2407 cut-off events. For 73375/73381 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13753 event pairs, 327 based on Foata normal form. 12/2412 useless extension candidates. Maximal degree in co-relation 14522. Up to 1822 conditions per place. [2024-06-14 11:32:10,080 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2024-06-14 11:32:10,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 230 transitions, 2755 flow [2024-06-14 11:32:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:32:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:32:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:32:10,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 11:32:10,081 INFO L175 Difference]: Start difference. First operand has 163 places, 187 transitions, 2160 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:32:10,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 230 transitions, 2755 flow [2024-06-14 11:32:10,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 230 transitions, 2666 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:10,206 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2214 flow [2024-06-14 11:32:10,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2214, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-14 11:32:10,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 11:32:10,207 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2214 flow [2024-06-14 11:32:10,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:10,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:10,207 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 11:32:10,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:32:10,208 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:10,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash 201918776, now seen corresponding path program 4 times [2024-06-14 11:32:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:10,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200466123] [2024-06-14 11:32:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:10,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:10,318 INFO 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 11:32:10,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:10,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200466123] [2024-06-14 11:32:10,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200466123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:10,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:10,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:10,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141646863] [2024-06-14 11:32:10,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:10,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:10,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:10,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:10,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2214 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:10,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:10,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:10,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:10,666 INFO L124 PetriNetUnfolderBase]: 1472/2483 cut-off events. [2024-06-14 11:32:10,667 INFO L125 PetriNetUnfolderBase]: For 80471/80471 co-relation queries the response was YES. [2024-06-14 11:32:10,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15136 conditions, 2483 events. 1472/2483 cut-off events. For 80471/80471 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14273 event pairs, 370 based on Foata normal form. 16/2484 useless extension candidates. Maximal degree in co-relation 15053. Up to 2007 conditions per place. [2024-06-14 11:32:10,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 44 changer transitions 0/218 dead transitions. [2024-06-14 11:32:10,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 218 transitions, 2726 flow [2024-06-14 11:32:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:32:10,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:32:10,687 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2214 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:32:10,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 218 transitions, 2726 flow [2024-06-14 11:32:10,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2666 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:10,853 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2265 flow [2024-06-14 11:32:10,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-14 11:32:10,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 11:32:10,854 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2265 flow [2024-06-14 11:32:10,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:10,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:10,854 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 11:32:10,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:32:10,854 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:10,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1926200768, now seen corresponding path program 5 times [2024-06-14 11:32:10,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:10,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199866710] [2024-06-14 11:32:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:10,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:10,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:10,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199866710] [2024-06-14 11:32:10,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199866710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:10,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:10,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780589146] [2024-06-14 11:32:10,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:10,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:11,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:11,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2265 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:11,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:11,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:11,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:11,314 INFO L124 PetriNetUnfolderBase]: 1530/2591 cut-off events. [2024-06-14 11:32:11,315 INFO L125 PetriNetUnfolderBase]: For 84818/84818 co-relation queries the response was YES. [2024-06-14 11:32:11,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15796 conditions, 2591 events. 1530/2591 cut-off events. For 84818/84818 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15121 event pairs, 385 based on Foata normal form. 16/2592 useless extension candidates. Maximal degree in co-relation 15711. Up to 2105 conditions per place. [2024-06-14 11:32:11,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 43 changer transitions 0/219 dead transitions. [2024-06-14 11:32:11,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 2781 flow [2024-06-14 11:32:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:32:11,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:32:11,337 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2265 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:32:11,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 2781 flow [2024-06-14 11:32:11,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 219 transitions, 2688 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:11,488 INFO L231 Difference]: Finished difference. Result has 171 places, 192 transitions, 2283 flow [2024-06-14 11:32:11,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2283, PETRI_PLACES=171, PETRI_TRANSITIONS=192} [2024-06-14 11:32:11,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-14 11:32:11,489 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 192 transitions, 2283 flow [2024-06-14 11:32:11,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:11,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:11,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:11,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:32:11,489 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:11,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1926052898, now seen corresponding path program 6 times [2024-06-14 11:32:11,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:11,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304948900] [2024-06-14 11:32:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:11,591 INFO 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 11:32:11,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:11,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304948900] [2024-06-14 11:32:11,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304948900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:11,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:11,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652052213] [2024-06-14 11:32:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:11,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:11,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:11,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:11,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 192 transitions, 2283 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:11,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:11,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:11,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:11,969 INFO L124 PetriNetUnfolderBase]: 1546/2623 cut-off events. [2024-06-14 11:32:11,969 INFO L125 PetriNetUnfolderBase]: For 85436/85436 co-relation queries the response was YES. [2024-06-14 11:32:11,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15877 conditions, 2623 events. 1546/2623 cut-off events. For 85436/85436 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15371 event pairs, 376 based on Foata normal form. 12/2620 useless extension candidates. Maximal degree in co-relation 15791. Up to 1958 conditions per place. [2024-06-14 11:32:11,990 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2024-06-14 11:32:11,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 225 transitions, 2847 flow [2024-06-14 11:32:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:32:11,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:32:11,991 INFO L175 Difference]: Start difference. First operand has 171 places, 192 transitions, 2283 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:32:11,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 225 transitions, 2847 flow [2024-06-14 11:32:12,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 225 transitions, 2754 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:12,146 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 2341 flow [2024-06-14 11:32:12,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2341, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-14 11:32:12,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-14 11:32:12,147 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 2341 flow [2024-06-14 11:32:12,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:12,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:12,147 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 11:32:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:32:12,147 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:12,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2133127070, now seen corresponding path program 1 times [2024-06-14 11:32:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797723839] [2024-06-14 11:32:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:12,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:12,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:12,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797723839] [2024-06-14 11:32:12,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797723839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:12,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:12,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:12,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199541602] [2024-06-14 11:32:12,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:12,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:12,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:12,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:12,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:12,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 2341 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:12,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:12,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:12,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:12,634 INFO L124 PetriNetUnfolderBase]: 1587/2704 cut-off events. [2024-06-14 11:32:12,634 INFO L125 PetriNetUnfolderBase]: For 90394/90394 co-relation queries the response was YES. [2024-06-14 11:32:12,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16332 conditions, 2704 events. 1587/2704 cut-off events. For 90394/90394 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16043 event pairs, 352 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 16244. Up to 1919 conditions per place. [2024-06-14 11:32:12,656 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 49 changer transitions 0/226 dead transitions. [2024-06-14 11:32:12,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 226 transitions, 2885 flow [2024-06-14 11:32:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:32:12,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 11:32:12,657 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 2341 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:32:12,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 226 transitions, 2885 flow [2024-06-14 11:32:12,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 226 transitions, 2817 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:12,821 INFO L231 Difference]: Finished difference. Result has 178 places, 196 transitions, 2399 flow [2024-06-14 11:32:12,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=178, PETRI_TRANSITIONS=196} [2024-06-14 11:32:12,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 11:32:12,821 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 196 transitions, 2399 flow [2024-06-14 11:32:12,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:12,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:12,822 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 11:32:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:32:12,822 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 11:32:12,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -427492630, now seen corresponding path program 7 times [2024-06-14 11:32:12,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092539352] [2024-06-14 11:32:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:12,923 INFO 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 11:32:12,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:12,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092539352] [2024-06-14 11:32:12,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092539352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:12,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:12,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:12,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594998997] [2024-06-14 11:32:12,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:12,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:12,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 196 transitions, 2399 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:12,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:12,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:12,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:13,335 INFO L124 PetriNetUnfolderBase]: 1628/2798 cut-off events. [2024-06-14 11:32:13,335 INFO L125 PetriNetUnfolderBase]: For 94785/94791 co-relation queries the response was YES. [2024-06-14 11:32:13,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16932 conditions, 2798 events. 1628/2798 cut-off events. For 94785/94791 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16773 event pairs, 317 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16842. Up to 2106 conditions per place. [2024-06-14 11:32:13,360 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-14 11:32:13,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 3121 flow [2024-06-14 11:32:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:32:13,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 11:32:13,361 INFO L175 Difference]: Start difference. First operand has 178 places, 196 transitions, 2399 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:32:13,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 3121 flow [2024-06-14 11:32:13,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 236 transitions, 3009 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:13,536 INFO L231 Difference]: Finished difference. Result has 181 places, 198 transitions, 2419 flow [2024-06-14 11:32:13,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2419, PETRI_PLACES=181, PETRI_TRANSITIONS=198} [2024-06-14 11:32:13,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-14 11:32:13,537 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 198 transitions, 2419 flow [2024-06-14 11:32:13,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:13,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:13,537 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 11:32:13,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:32:13,537 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 11:32:13,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:13,538 INFO L85 PathProgramCache]: Analyzing trace with hash -597628874, now seen corresponding path program 8 times [2024-06-14 11:32:13,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:13,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259539594] [2024-06-14 11:32:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:13,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:13,664 INFO 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 11:32:13,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:13,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259539594] [2024-06-14 11:32:13,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259539594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:13,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:13,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:13,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963128255] [2024-06-14 11:32:13,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:13,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:13,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:13,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:13,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:13,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 198 transitions, 2419 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:13,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:13,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:13,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:14,064 INFO L124 PetriNetUnfolderBase]: 1686/2896 cut-off events. [2024-06-14 11:32:14,064 INFO L125 PetriNetUnfolderBase]: For 102173/102179 co-relation queries the response was YES. [2024-06-14 11:32:14,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17434 conditions, 2896 events. 1686/2896 cut-off events. For 102173/102179 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17488 event pairs, 422 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17342. Up to 2377 conditions per place. [2024-06-14 11:32:14,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-14 11:32:14,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 232 transitions, 2981 flow [2024-06-14 11:32:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:32:14,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 11:32:14,090 INFO L175 Difference]: Start difference. First operand has 181 places, 198 transitions, 2419 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:32:14,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 232 transitions, 2981 flow [2024-06-14 11:32:14,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 232 transitions, 2837 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:14,275 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 2392 flow [2024-06-14 11:32:14,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2024-06-14 11:32:14,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-14 11:32:14,276 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 2392 flow [2024-06-14 11:32:14,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:14,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:14,280 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 11:32:14,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:32:14,281 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 11:32:14,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash -398182934, now seen corresponding path program 9 times [2024-06-14 11:32:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:14,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520790782] [2024-06-14 11:32:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:14,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:14,427 INFO 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 11:32:14,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520790782] [2024-06-14 11:32:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520790782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:14,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:14,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513999124] [2024-06-14 11:32:14,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:14,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:14,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:14,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 2392 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:14,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:14,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:14,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:14,909 INFO L124 PetriNetUnfolderBase]: 1744/2994 cut-off events. [2024-06-14 11:32:14,909 INFO L125 PetriNetUnfolderBase]: For 106768/106774 co-relation queries the response was YES. [2024-06-14 11:32:14,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17684 conditions, 2994 events. 1744/2994 cut-off events. For 106768/106774 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18262 event pairs, 432 based on Foata normal form. 16/3002 useless extension candidates. Maximal degree in co-relation 17592. Up to 2475 conditions per place. [2024-06-14 11:32:14,936 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 43 changer transitions 0/230 dead transitions. [2024-06-14 11:32:14,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 2940 flow [2024-06-14 11:32:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:32:14,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 11:32:14,938 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 2392 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:32:14,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 2940 flow [2024-06-14 11:32:15,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 230 transitions, 2849 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:15,126 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2414 flow [2024-06-14 11:32:15,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2414, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-06-14 11:32:15,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 11:32:15,126 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2414 flow [2024-06-14 11:32:15,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:15,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:15,127 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 11:32:15,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:32:15,127 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 11:32:15,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1285671304, now seen corresponding path program 10 times [2024-06-14 11:32:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:15,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602508915] [2024-06-14 11:32:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:15,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:15,233 INFO 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 11:32:15,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602508915] [2024-06-14 11:32:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602508915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:15,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:15,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997307251] [2024-06-14 11:32:15,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:15,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:15,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:15,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:15,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2414 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:15,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:15,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:15,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:15,630 INFO L124 PetriNetUnfolderBase]: 1716/2940 cut-off events. [2024-06-14 11:32:15,630 INFO L125 PetriNetUnfolderBase]: For 101748/101754 co-relation queries the response was YES. [2024-06-14 11:32:15,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17014 conditions, 2940 events. 1716/2940 cut-off events. For 101748/101754 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17903 event pairs, 418 based on Foata normal form. 20/2948 useless extension candidates. Maximal degree in co-relation 16921. Up to 2431 conditions per place. [2024-06-14 11:32:15,655 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 42 changer transitions 0/228 dead transitions. [2024-06-14 11:32:15,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2952 flow [2024-06-14 11:32:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:32:15,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 11:32:15,657 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 2414 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:32:15,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2952 flow [2024-06-14 11:32:15,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2849 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:15,853 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 2424 flow [2024-06-14 11:32:15,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2424, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-14 11:32:15,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 11:32:15,853 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 2424 flow [2024-06-14 11:32:15,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:15,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:15,854 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 11:32:15,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:32:15,854 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 11:32:15,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 2 times [2024-06-14 11:32:15,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750144544] [2024-06-14 11:32:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:15,955 INFO 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 11:32:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750144544] [2024-06-14 11:32:15,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750144544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44747856] [2024-06-14 11:32:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:15,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:15,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 2424 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:15,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:15,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:15,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:16,392 INFO L124 PetriNetUnfolderBase]: 1757/3021 cut-off events. [2024-06-14 11:32:16,393 INFO L125 PetriNetUnfolderBase]: For 103207/103213 co-relation queries the response was YES. [2024-06-14 11:32:16,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17312 conditions, 3021 events. 1757/3021 cut-off events. For 103207/103213 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18588 event pairs, 418 based on Foata normal form. 16/3025 useless extension candidates. Maximal degree in co-relation 17218. Up to 2415 conditions per place. [2024-06-14 11:32:16,418 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-14 11:32:16,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2982 flow [2024-06-14 11:32:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:32:16,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:32:16,420 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 2424 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:32:16,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2982 flow [2024-06-14 11:32:16,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 2897 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:16,614 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2457 flow [2024-06-14 11:32:16,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2457, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-14 11:32:16,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 11:32:16,615 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2457 flow [2024-06-14 11:32:16,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:16,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:16,615 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 11:32:16,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:32:16,616 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 11:32:16,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1364068624, now seen corresponding path program 3 times [2024-06-14 11:32:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649821952] [2024-06-14 11:32:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:16,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:16,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649821952] [2024-06-14 11:32:16,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649821952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:16,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:16,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757258330] [2024-06-14 11:32:16,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:16,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:16,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:16,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2457 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:16,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:16,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:16,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:17,153 INFO L124 PetriNetUnfolderBase]: 1798/3107 cut-off events. [2024-06-14 11:32:17,153 INFO L125 PetriNetUnfolderBase]: For 107677/107683 co-relation queries the response was YES. [2024-06-14 11:32:17,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17761 conditions, 3107 events. 1798/3107 cut-off events. For 107677/107683 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19246 event pairs, 431 based on Foata normal form. 12/3111 useless extension candidates. Maximal degree in co-relation 17666. Up to 2394 conditions per place. [2024-06-14 11:32:17,180 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-14 11:32:17,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 236 transitions, 3033 flow [2024-06-14 11:32:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:32:17,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-14 11:32:17,181 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2457 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:32:17,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 236 transitions, 3033 flow [2024-06-14 11:32:17,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 236 transitions, 2929 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:17,372 INFO L231 Difference]: Finished difference. Result has 190 places, 203 transitions, 2477 flow [2024-06-14 11:32:17,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2477, PETRI_PLACES=190, PETRI_TRANSITIONS=203} [2024-06-14 11:32:17,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 11:32:17,373 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 203 transitions, 2477 flow [2024-06-14 11:32:17,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:17,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:17,373 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 11:32:17,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:32:17,374 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 11:32:17,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1855156424, now seen corresponding path program 4 times [2024-06-14 11:32:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105279889] [2024-06-14 11:32:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:17,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:17,471 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 11:32:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105279889] [2024-06-14 11:32:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105279889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:17,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:17,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273411255] [2024-06-14 11:32:17,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:17,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:17,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:17,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:17,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 203 transitions, 2477 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:17,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:17,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:17,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:17,902 INFO L124 PetriNetUnfolderBase]: 1778/3075 cut-off events. [2024-06-14 11:32:17,902 INFO L125 PetriNetUnfolderBase]: For 103287/103293 co-relation queries the response was YES. [2024-06-14 11:32:17,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17193 conditions, 3075 events. 1778/3075 cut-off events. For 103287/103293 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19150 event pairs, 378 based on Foata normal form. 16/3079 useless extension candidates. Maximal degree in co-relation 17097. Up to 1710 conditions per place. [2024-06-14 11:32:17,927 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 55 changer transitions 0/233 dead transitions. [2024-06-14 11:32:17,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 233 transitions, 2943 flow [2024-06-14 11:32:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:32:17,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 11:32:17,929 INFO L175 Difference]: Start difference. First operand has 190 places, 203 transitions, 2477 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:32:17,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 233 transitions, 2943 flow [2024-06-14 11:32:18,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 233 transitions, 2815 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:18,076 INFO L231 Difference]: Finished difference. Result has 190 places, 202 transitions, 2389 flow [2024-06-14 11:32:18,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2389, PETRI_PLACES=190, PETRI_TRANSITIONS=202} [2024-06-14 11:32:18,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 11:32:18,076 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 202 transitions, 2389 flow [2024-06-14 11:32:18,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:18,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:18,077 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 11:32:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:32:18,077 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 11:32:18,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash 113752879, now seen corresponding path program 1 times [2024-06-14 11:32:18,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:18,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674008642] [2024-06-14 11:32:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:18,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:18,182 INFO 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 11:32:18,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674008642] [2024-06-14 11:32:18,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674008642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:18,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:18,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:18,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645745488] [2024-06-14 11:32:18,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:18,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:18,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 202 transitions, 2389 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:18,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:18,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:18,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:18,569 INFO L124 PetriNetUnfolderBase]: 1796/3079 cut-off events. [2024-06-14 11:32:18,569 INFO L125 PetriNetUnfolderBase]: For 95212/95212 co-relation queries the response was YES. [2024-06-14 11:32:18,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17323 conditions, 3079 events. 1796/3079 cut-off events. For 95212/95212 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18972 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17227. Up to 2581 conditions per place. [2024-06-14 11:32:18,594 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 79 changer transitions 0/233 dead transitions. [2024-06-14 11:32:18,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 233 transitions, 3265 flow [2024-06-14 11:32:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:32:18,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 11:32:18,596 INFO L175 Difference]: Start difference. First operand has 190 places, 202 transitions, 2389 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:32:18,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 233 transitions, 3265 flow [2024-06-14 11:32:18,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 233 transitions, 3068 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 11:32:18,762 INFO L231 Difference]: Finished difference. Result has 190 places, 213 transitions, 2483 flow [2024-06-14 11:32:18,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=190, PETRI_TRANSITIONS=213} [2024-06-14 11:32:18,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 11:32:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 213 transitions, 2483 flow [2024-06-14 11:32:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:18,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:18,763 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 11:32:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:32:18,763 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 11:32:18,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash 418301511, now seen corresponding path program 2 times [2024-06-14 11:32:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437855780] [2024-06-14 11:32:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:18,874 INFO 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 11:32:18,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:18,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437855780] [2024-06-14 11:32:18,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437855780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:18,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:18,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:18,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699428077] [2024-06-14 11:32:18,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:18,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:18,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:18,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:18,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 213 transitions, 2483 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:18,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:18,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:18,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:19,351 INFO L124 PetriNetUnfolderBase]: 1822/3126 cut-off events. [2024-06-14 11:32:19,352 INFO L125 PetriNetUnfolderBase]: For 100827/100827 co-relation queries the response was YES. [2024-06-14 11:32:19,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17461 conditions, 3126 events. 1822/3126 cut-off events. For 100827/100827 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19326 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17366. Up to 2724 conditions per place. [2024-06-14 11:32:19,385 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 66 changer transitions 0/238 dead transitions. [2024-06-14 11:32:19,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 238 transitions, 3353 flow [2024-06-14 11:32:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:32:19,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 11:32:19,386 INFO L175 Difference]: Start difference. First operand has 190 places, 213 transitions, 2483 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:32:19,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 238 transitions, 3353 flow [2024-06-14 11:32:19,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 238 transitions, 3218 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:19,589 INFO L231 Difference]: Finished difference. Result has 194 places, 221 transitions, 2599 flow [2024-06-14 11:32:19,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=194, PETRI_TRANSITIONS=221} [2024-06-14 11:32:19,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 11:32:19,590 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 221 transitions, 2599 flow [2024-06-14 11:32:19,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:19,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:19,590 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 11:32:19,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:32:19,591 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 11:32:19,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash 418307091, now seen corresponding path program 3 times [2024-06-14 11:32:19,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:19,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960952447] [2024-06-14 11:32:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:19,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:19,723 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 11:32:19,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:19,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960952447] [2024-06-14 11:32:19,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960952447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:19,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:19,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917011050] [2024-06-14 11:32:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:19,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:19,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:19,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:19,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 221 transitions, 2599 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:19,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:19,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:19,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:20,207 INFO L124 PetriNetUnfolderBase]: 1816/3118 cut-off events. [2024-06-14 11:32:20,208 INFO L125 PetriNetUnfolderBase]: For 103174/103174 co-relation queries the response was YES. [2024-06-14 11:32:20,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17423 conditions, 3118 events. 1816/3118 cut-off events. For 103174/103174 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19260 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17326. Up to 2718 conditions per place. [2024-06-14 11:32:20,234 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 67 changer transitions 0/239 dead transitions. [2024-06-14 11:32:20,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 239 transitions, 3285 flow [2024-06-14 11:32:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:32:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:32:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 11:32:20,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-14 11:32:20,235 INFO L175 Difference]: Start difference. First operand has 194 places, 221 transitions, 2599 flow. Second operand 9 states and 202 transitions. [2024-06-14 11:32:20,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 239 transitions, 3285 flow [2024-06-14 11:32:20,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 239 transitions, 3165 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:20,433 INFO L231 Difference]: Finished difference. Result has 200 places, 221 transitions, 2620 flow [2024-06-14 11:32:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2620, PETRI_PLACES=200, PETRI_TRANSITIONS=221} [2024-06-14 11:32:20,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-14 11:32:20,433 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 221 transitions, 2620 flow [2024-06-14 11:32:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:20,434 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 11:32:20,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:32:20,434 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:20,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1919689313, now seen corresponding path program 4 times [2024-06-14 11:32:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030244320] [2024-06-14 11:32:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:20,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:20,548 INFO 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 11:32:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030244320] [2024-06-14 11:32:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030244320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:20,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:20,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:20,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285100402] [2024-06-14 11:32:20,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:20,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:20,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:20,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:20,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:20,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 221 transitions, 2620 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:20,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:20,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:21,014 INFO L124 PetriNetUnfolderBase]: 1857/3197 cut-off events. [2024-06-14 11:32:21,014 INFO L125 PetriNetUnfolderBase]: For 108149/108149 co-relation queries the response was YES. [2024-06-14 11:32:21,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18172 conditions, 3197 events. 1857/3197 cut-off events. For 108149/108149 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19902 event pairs, 397 based on Foata normal form. 2/3196 useless extension candidates. Maximal degree in co-relation 18073. Up to 2785 conditions per place. [2024-06-14 11:32:21,042 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 53 changer transitions 0/263 dead transitions. [2024-06-14 11:32:21,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 263 transitions, 3561 flow [2024-06-14 11:32:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:21,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 11:32:21,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 11:32:21,043 INFO L175 Difference]: Start difference. First operand has 200 places, 221 transitions, 2620 flow. Second operand 6 states and 156 transitions. [2024-06-14 11:32:21,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 263 transitions, 3561 flow [2024-06-14 11:32:21,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 263 transitions, 3408 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:32:21,309 INFO L231 Difference]: Finished difference. Result has 200 places, 239 transitions, 2934 flow [2024-06-14 11:32:21,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2934, PETRI_PLACES=200, PETRI_TRANSITIONS=239} [2024-06-14 11:32:21,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-14 11:32:21,309 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 239 transitions, 2934 flow [2024-06-14 11:32:21,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:21,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:21,310 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 11:32:21,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:32:21,310 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:21,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash 568817961, now seen corresponding path program 5 times [2024-06-14 11:32:21,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:21,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856044746] [2024-06-14 11:32:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:21,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:21,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:21,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856044746] [2024-06-14 11:32:21,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856044746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:21,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:21,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:21,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125788462] [2024-06-14 11:32:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:21,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:21,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:21,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:21,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 239 transitions, 2934 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:21,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:21,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:21,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:21,858 INFO L124 PetriNetUnfolderBase]: 1875/3218 cut-off events. [2024-06-14 11:32:21,858 INFO L125 PetriNetUnfolderBase]: For 115488/115488 co-relation queries the response was YES. [2024-06-14 11:32:21,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18678 conditions, 3218 events. 1875/3218 cut-off events. For 115488/115488 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20075 event pairs, 420 based on Foata normal form. 2/3213 useless extension candidates. Maximal degree in co-relation 18576. Up to 2680 conditions per place. [2024-06-14 11:32:21,888 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 156 selfloop transitions, 107 changer transitions 0/270 dead transitions. [2024-06-14 11:32:21,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 270 transitions, 3996 flow [2024-06-14 11:32:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:32:21,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:32:21,890 INFO L175 Difference]: Start difference. First operand has 200 places, 239 transitions, 2934 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:32:21,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 270 transitions, 3996 flow [2024-06-14 11:32:22,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 270 transitions, 3894 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:22,259 INFO L231 Difference]: Finished difference. Result has 205 places, 246 transitions, 3198 flow [2024-06-14 11:32:22,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3198, PETRI_PLACES=205, PETRI_TRANSITIONS=246} [2024-06-14 11:32:22,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 11:32:22,260 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 246 transitions, 3198 flow [2024-06-14 11:32:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:22,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:22,260 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 11:32:22,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:32:22,261 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:22,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash 568823541, now seen corresponding path program 6 times [2024-06-14 11:32:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:22,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758691884] [2024-06-14 11:32:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:22,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:22,366 INFO 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 11:32:22,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:22,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758691884] [2024-06-14 11:32:22,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758691884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:22,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:22,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851983922] [2024-06-14 11:32:22,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:22,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:22,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:22,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:22,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 246 transitions, 3198 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:22,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:22,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:22,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:22,934 INFO L124 PetriNetUnfolderBase]: 1877/3224 cut-off events. [2024-06-14 11:32:22,934 INFO L125 PetriNetUnfolderBase]: For 120322/120322 co-relation queries the response was YES. [2024-06-14 11:32:22,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18994 conditions, 3224 events. 1877/3224 cut-off events. For 120322/120322 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20077 event pairs, 420 based on Foata normal form. 2/3219 useless extension candidates. Maximal degree in co-relation 18890. Up to 2684 conditions per place. [2024-06-14 11:32:22,966 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 113 changer transitions 0/275 dead transitions. [2024-06-14 11:32:22,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 275 transitions, 4228 flow [2024-06-14 11:32:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:32:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:32:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 11:32:22,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 11:32:22,967 INFO L175 Difference]: Start difference. First operand has 205 places, 246 transitions, 3198 flow. Second operand 9 states and 213 transitions. [2024-06-14 11:32:22,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 275 transitions, 4228 flow [2024-06-14 11:32:23,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 275 transitions, 3982 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:23,321 INFO L231 Difference]: Finished difference. Result has 209 places, 249 transitions, 3246 flow [2024-06-14 11:32:23,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3246, PETRI_PLACES=209, PETRI_TRANSITIONS=249} [2024-06-14 11:32:23,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 11:32:23,322 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 249 transitions, 3246 flow [2024-06-14 11:32:23,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:23,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:23,322 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 11:32:23,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:32:23,322 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:23,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:23,323 INFO L85 PathProgramCache]: Analyzing trace with hash -465768761, now seen corresponding path program 1 times [2024-06-14 11:32:23,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:23,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616822048] [2024-06-14 11:32:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:23,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:23,422 INFO 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 11:32:23,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:23,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616822048] [2024-06-14 11:32:23,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616822048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:23,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:23,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:23,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915118879] [2024-06-14 11:32:23,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:23,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:23,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:23,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:23,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:23,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 249 transitions, 3246 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:23,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:23,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:23,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:23,884 INFO L124 PetriNetUnfolderBase]: 1905/3286 cut-off events. [2024-06-14 11:32:23,885 INFO L125 PetriNetUnfolderBase]: For 121649/121655 co-relation queries the response was YES. [2024-06-14 11:32:23,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19267 conditions, 3286 events. 1905/3286 cut-off events. For 121649/121655 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20635 event pairs, 425 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 19163. Up to 2729 conditions per place. [2024-06-14 11:32:23,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 78 changer transitions 0/290 dead transitions. [2024-06-14 11:32:23,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 290 transitions, 4307 flow [2024-06-14 11:32:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:32:23,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-14 11:32:23,917 INFO L175 Difference]: Start difference. First operand has 209 places, 249 transitions, 3246 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:32:23,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 290 transitions, 4307 flow [2024-06-14 11:32:24,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 290 transitions, 4032 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 11:32:24,301 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3298 flow [2024-06-14 11:32:24,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3298, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-14 11:32:24,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 11:32:24,301 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3298 flow [2024-06-14 11:32:24,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:24,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:24,302 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 11:32:24,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:32:24,302 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:24,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1150102743, now seen corresponding path program 2 times [2024-06-14 11:32:24,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:24,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091054699] [2024-06-14 11:32:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091054699] [2024-06-14 11:32:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091054699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:24,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:24,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:24,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571331713] [2024-06-14 11:32:24,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:24,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:24,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 3298 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:24,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:24,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:24,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:24,919 INFO L124 PetriNetUnfolderBase]: 1941/3348 cut-off events. [2024-06-14 11:32:24,919 INFO L125 PetriNetUnfolderBase]: For 124584/124590 co-relation queries the response was YES. [2024-06-14 11:32:24,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19813 conditions, 3348 events. 1941/3348 cut-off events. For 124584/124590 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21138 event pairs, 426 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19708. Up to 2760 conditions per place. [2024-06-14 11:32:24,952 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 84 changer transitions 0/296 dead transitions. [2024-06-14 11:32:24,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 296 transitions, 4351 flow [2024-06-14 11:32:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:32:24,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:32:24,954 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3298 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:32:24,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 296 transitions, 4351 flow [2024-06-14 11:32:25,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 296 transitions, 4247 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-14 11:32:25,325 INFO L231 Difference]: Finished difference. Result has 216 places, 276 transitions, 3520 flow [2024-06-14 11:32:25,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3520, PETRI_PLACES=216, PETRI_TRANSITIONS=276} [2024-06-14 11:32:25,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-14 11:32:25,326 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 276 transitions, 3520 flow [2024-06-14 11:32:25,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:25,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:25,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:25,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:32:25,326 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:25,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1149716793, now seen corresponding path program 3 times [2024-06-14 11:32:25,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:25,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413886406] [2024-06-14 11:32:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:25,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:25,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413886406] [2024-06-14 11:32:25,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413886406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:25,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:25,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:25,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380622300] [2024-06-14 11:32:25,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:25,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:25,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:25,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:25,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:25,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 276 transitions, 3520 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:25,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:25,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:25,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:25,942 INFO L124 PetriNetUnfolderBase]: 1935/3340 cut-off events. [2024-06-14 11:32:25,943 INFO L125 PetriNetUnfolderBase]: For 127182/127188 co-relation queries the response was YES. [2024-06-14 11:32:25,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19966 conditions, 3340 events. 1935/3340 cut-off events. For 127182/127188 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21095 event pairs, 426 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19857. Up to 2755 conditions per place. [2024-06-14 11:32:25,979 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 85 changer transitions 0/295 dead transitions. [2024-06-14 11:32:25,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 295 transitions, 4338 flow [2024-06-14 11:32:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:32:25,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 11:32:25,981 INFO L175 Difference]: Start difference. First operand has 216 places, 276 transitions, 3520 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:32:25,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 295 transitions, 4338 flow [2024-06-14 11:32:26,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 295 transitions, 4170 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:26,277 INFO L231 Difference]: Finished difference. Result has 220 places, 276 transitions, 3529 flow [2024-06-14 11:32:26,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3529, PETRI_PLACES=220, PETRI_TRANSITIONS=276} [2024-06-14 11:32:26,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 11:32:26,278 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 276 transitions, 3529 flow [2024-06-14 11:32:26,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:26,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:26,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:26,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:32:26,278 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:26,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2038670795, now seen corresponding path program 1 times [2024-06-14 11:32:26,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:26,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419784853] [2024-06-14 11:32:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:26,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:26,427 INFO 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 11:32:26,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:26,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419784853] [2024-06-14 11:32:26,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419784853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:26,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:26,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:26,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536368323] [2024-06-14 11:32:26,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:26,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:26,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 276 transitions, 3529 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:26,958 INFO L124 PetriNetUnfolderBase]: 1940/3345 cut-off events. [2024-06-14 11:32:26,958 INFO L125 PetriNetUnfolderBase]: For 130626/130632 co-relation queries the response was YES. [2024-06-14 11:32:26,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20116 conditions, 3345 events. 1940/3345 cut-off events. For 130626/130632 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21127 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 20006. Up to 2902 conditions per place. [2024-06-14 11:32:26,989 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 230 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2024-06-14 11:32:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 4414 flow [2024-06-14 11:32:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:32:27,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 11:32:27,004 INFO L175 Difference]: Start difference. First operand has 220 places, 276 transitions, 3529 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:32:27,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 4414 flow [2024-06-14 11:32:27,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 298 transitions, 4250 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:27,305 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3550 flow [2024-06-14 11:32:27,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3550, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-14 11:32:27,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-14 11:32:27,306 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3550 flow [2024-06-14 11:32:27,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:27,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:27,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:32:27,307 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 11:32:27,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:27,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2043857763, now seen corresponding path program 1 times [2024-06-14 11:32:27,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688718865] [2024-06-14 11:32:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:27,421 INFO 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 11:32:27,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:27,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688718865] [2024-06-14 11:32:27,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688718865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:27,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:27,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:27,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706923011] [2024-06-14 11:32:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:27,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:27,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:27,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:27,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3550 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:27,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:27,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:27,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:27,952 INFO L124 PetriNetUnfolderBase]: 1956/3369 cut-off events. [2024-06-14 11:32:27,952 INFO L125 PetriNetUnfolderBase]: For 139381/139387 co-relation queries the response was YES. [2024-06-14 11:32:27,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20289 conditions, 3369 events. 1956/3369 cut-off events. For 139381/139387 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21220 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 20178. Up to 2914 conditions per place. [2024-06-14 11:32:27,987 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-14 11:32:27,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 302 transitions, 4442 flow [2024-06-14 11:32:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:32:27,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 11:32:27,988 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3550 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:32:27,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 302 transitions, 4442 flow [2024-06-14 11:32:28,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 302 transitions, 4332 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:28,343 INFO L231 Difference]: Finished difference. Result has 226 places, 282 transitions, 3630 flow [2024-06-14 11:32:28,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3630, PETRI_PLACES=226, PETRI_TRANSITIONS=282} [2024-06-14 11:32:28,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-14 11:32:28,344 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 282 transitions, 3630 flow [2024-06-14 11:32:28,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:28,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:28,345 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 11:32:28,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:32:28,345 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 11:32:28,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1000219847, now seen corresponding path program 4 times [2024-06-14 11:32:28,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:28,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338799785] [2024-06-14 11:32:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:28,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:28,518 INFO 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 11:32:28,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:28,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338799785] [2024-06-14 11:32:28,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338799785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:28,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:28,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:28,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982752058] [2024-06-14 11:32:28,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:28,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:28,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:28,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:28,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 282 transitions, 3630 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:28,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:28,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:28,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:29,054 INFO L124 PetriNetUnfolderBase]: 1974/3398 cut-off events. [2024-06-14 11:32:29,054 INFO L125 PetriNetUnfolderBase]: For 142393/142393 co-relation queries the response was YES. [2024-06-14 11:32:29,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20698 conditions, 3398 events. 1974/3398 cut-off events. For 142393/142393 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21386 event pairs, 396 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 20585. Up to 2900 conditions per place. [2024-06-14 11:32:29,087 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-14 11:32:29,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 315 transitions, 4494 flow [2024-06-14 11:32:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 11:32:29,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-14 11:32:29,088 INFO L175 Difference]: Start difference. First operand has 226 places, 282 transitions, 3630 flow. Second operand 6 states and 159 transitions. [2024-06-14 11:32:29,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 315 transitions, 4494 flow [2024-06-14 11:32:29,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 315 transitions, 4354 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:29,351 INFO L231 Difference]: Finished difference. Result has 229 places, 289 transitions, 3786 flow [2024-06-14 11:32:29,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=229, PETRI_TRANSITIONS=289} [2024-06-14 11:32:29,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 11:32:29,352 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 289 transitions, 3786 flow [2024-06-14 11:32:29,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:29,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:29,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:29,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:32:29,353 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 11:32:29,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash 246786085, now seen corresponding path program 5 times [2024-06-14 11:32:29,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824751664] [2024-06-14 11:32:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:29,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:29,449 INFO 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 11:32:29,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824751664] [2024-06-14 11:32:29,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824751664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:29,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:29,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:29,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044105777] [2024-06-14 11:32:29,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:29,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:29,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:29,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 289 transitions, 3786 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:29,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:29,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:29,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:29,931 INFO L124 PetriNetUnfolderBase]: 1992/3432 cut-off events. [2024-06-14 11:32:29,932 INFO L125 PetriNetUnfolderBase]: For 151473/151479 co-relation queries the response was YES. [2024-06-14 11:32:29,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21127 conditions, 3432 events. 1992/3432 cut-off events. For 151473/151479 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21728 event pairs, 429 based on Foata normal form. 6/3432 useless extension candidates. Maximal degree in co-relation 21012. Up to 2821 conditions per place. [2024-06-14 11:32:29,965 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 205 selfloop transitions, 103 changer transitions 0/315 dead transitions. [2024-06-14 11:32:29,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 315 transitions, 4853 flow [2024-06-14 11:32:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:32:29,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-14 11:32:29,967 INFO L175 Difference]: Start difference. First operand has 229 places, 289 transitions, 3786 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:32:29,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 315 transitions, 4853 flow [2024-06-14 11:32:30,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 315 transitions, 4751 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:30,400 INFO L231 Difference]: Finished difference. Result has 231 places, 296 transitions, 3989 flow [2024-06-14 11:32:30,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3989, PETRI_PLACES=231, PETRI_TRANSITIONS=296} [2024-06-14 11:32:30,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 11:32:30,401 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 296 transitions, 3989 flow [2024-06-14 11:32:30,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:30,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:30,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:30,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:32:30,402 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 11:32:30,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:30,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1101112143, now seen corresponding path program 6 times [2024-06-14 11:32:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:30,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840092190] [2024-06-14 11:32:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:30,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:30,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840092190] [2024-06-14 11:32:30,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840092190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:30,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:30,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016627982] [2024-06-14 11:32:30,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:30,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:30,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:30,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 296 transitions, 3989 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:30,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:30,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:30,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:31,032 INFO L124 PetriNetUnfolderBase]: 1986/3425 cut-off events. [2024-06-14 11:32:31,032 INFO L125 PetriNetUnfolderBase]: For 154171/154177 co-relation queries the response was YES. [2024-06-14 11:32:31,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 3425 events. 1986/3425 cut-off events. For 154171/154177 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21752 event pairs, 428 based on Foata normal form. 6/3425 useless extension candidates. Maximal degree in co-relation 21092. Up to 2816 conditions per place. [2024-06-14 11:32:31,065 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 106 changer transitions 0/321 dead transitions. [2024-06-14 11:32:31,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 321 transitions, 5003 flow [2024-06-14 11:32:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 11:32:31,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-14 11:32:31,070 INFO L175 Difference]: Start difference. First operand has 231 places, 296 transitions, 3989 flow. Second operand 6 states and 158 transitions. [2024-06-14 11:32:31,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 321 transitions, 5003 flow [2024-06-14 11:32:31,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 321 transitions, 4801 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:31,437 INFO L231 Difference]: Finished difference. Result has 234 places, 296 transitions, 4022 flow [2024-06-14 11:32:31,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4022, PETRI_PLACES=234, PETRI_TRANSITIONS=296} [2024-06-14 11:32:31,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 11:32:31,438 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 296 transitions, 4022 flow [2024-06-14 11:32:31,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:31,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:31,439 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 11:32:31,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:32:31,439 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 11:32:31,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:31,439 INFO L85 PathProgramCache]: Analyzing trace with hash -27023285, now seen corresponding path program 1 times [2024-06-14 11:32:31,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:31,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433463168] [2024-06-14 11:32:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:31,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:31,529 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 11:32:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:31,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433463168] [2024-06-14 11:32:31,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433463168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:31,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:31,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:31,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902856175] [2024-06-14 11:32:31,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:31,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:31,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:31,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 296 transitions, 4022 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:31,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:31,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:31,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:32,013 INFO L124 PetriNetUnfolderBase]: 2015/3464 cut-off events. [2024-06-14 11:32:32,014 INFO L125 PetriNetUnfolderBase]: For 159414/159420 co-relation queries the response was YES. [2024-06-14 11:32:32,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21697 conditions, 3464 events. 2015/3464 cut-off events. For 159414/159420 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21958 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21581. Up to 2978 conditions per place. [2024-06-14 11:32:32,055 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 67 changer transitions 0/326 dead transitions. [2024-06-14 11:32:32,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 326 transitions, 5112 flow [2024-06-14 11:32:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:32:32,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-14 11:32:32,057 INFO L175 Difference]: Start difference. First operand has 234 places, 296 transitions, 4022 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:32:32,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 326 transitions, 5112 flow [2024-06-14 11:32:32,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 326 transitions, 4905 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:32,490 INFO L231 Difference]: Finished difference. Result has 234 places, 308 transitions, 4155 flow [2024-06-14 11:32:32,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4155, PETRI_PLACES=234, PETRI_TRANSITIONS=308} [2024-06-14 11:32:32,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 11:32:32,491 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 308 transitions, 4155 flow [2024-06-14 11:32:32,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:32,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:32,491 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 11:32:32,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:32:32,491 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 11:32:32,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1596296523, now seen corresponding path program 2 times [2024-06-14 11:32:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:32,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230936131] [2024-06-14 11:32:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:32,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:32,581 INFO 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 11:32:32,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:32,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230936131] [2024-06-14 11:32:32,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230936131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:32,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:32,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:32,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458266855] [2024-06-14 11:32:32,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:32,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:32,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:32,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:32,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:32,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 308 transitions, 4155 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:32,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:32,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:32,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:33,076 INFO L124 PetriNetUnfolderBase]: 2012/3463 cut-off events. [2024-06-14 11:32:33,076 INFO L125 PetriNetUnfolderBase]: For 151476/151482 co-relation queries the response was YES. [2024-06-14 11:32:33,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21405 conditions, 3463 events. 2012/3463 cut-off events. For 151476/151482 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21891 event pairs, 423 based on Foata normal form. 1/3457 useless extension candidates. Maximal degree in co-relation 21290. Up to 2975 conditions per place. [2024-06-14 11:32:33,112 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 71 changer transitions 0/329 dead transitions. [2024-06-14 11:32:33,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 329 transitions, 5063 flow [2024-06-14 11:32:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:32:33,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:32:33,114 INFO L175 Difference]: Start difference. First operand has 234 places, 308 transitions, 4155 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:32:33,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 329 transitions, 5063 flow [2024-06-14 11:32:33,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 329 transitions, 4933 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:33,502 INFO L231 Difference]: Finished difference. Result has 238 places, 308 transitions, 4173 flow [2024-06-14 11:32:33,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4025, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4173, PETRI_PLACES=238, PETRI_TRANSITIONS=308} [2024-06-14 11:32:33,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 11:32:33,503 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 308 transitions, 4173 flow [2024-06-14 11:32:33,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:33,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:33,503 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 11:32:33,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:32:33,503 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 11:32:33,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash -283403825, now seen corresponding path program 3 times [2024-06-14 11:32:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:33,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856578334] [2024-06-14 11:32:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:33,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:33,599 INFO 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 11:32:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:33,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856578334] [2024-06-14 11:32:33,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856578334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:33,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:33,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242823649] [2024-06-14 11:32:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:33,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:33,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:33,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 308 transitions, 4173 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:34,101 INFO L124 PetriNetUnfolderBase]: 2017/3474 cut-off events. [2024-06-14 11:32:34,101 INFO L125 PetriNetUnfolderBase]: For 156714/156720 co-relation queries the response was YES. [2024-06-14 11:32:34,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21565 conditions, 3474 events. 2017/3474 cut-off events. For 156714/156720 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22004 event pairs, 408 based on Foata normal form. 5/3474 useless extension candidates. Maximal degree in co-relation 21449. Up to 3064 conditions per place. [2024-06-14 11:32:34,136 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 285 selfloop transitions, 35 changer transitions 0/327 dead transitions. [2024-06-14 11:32:34,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 327 transitions, 4910 flow [2024-06-14 11:32:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:32:34,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-14 11:32:34,138 INFO L175 Difference]: Start difference. First operand has 238 places, 308 transitions, 4173 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:32:34,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 327 transitions, 4910 flow [2024-06-14 11:32:34,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 327 transitions, 4671 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:34,485 INFO L231 Difference]: Finished difference. Result has 239 places, 311 transitions, 4073 flow [2024-06-14 11:32:34,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4073, PETRI_PLACES=239, PETRI_TRANSITIONS=311} [2024-06-14 11:32:34,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-14 11:32:34,486 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 311 transitions, 4073 flow [2024-06-14 11:32:34,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:34,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:34,486 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 11:32:34,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:32:34,487 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 11:32:34,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash -14643125, now seen corresponding path program 4 times [2024-06-14 11:32:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121554146] [2024-06-14 11:32:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:34,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:34,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:34,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121554146] [2024-06-14 11:32:34,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121554146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:34,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:34,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825615762] [2024-06-14 11:32:34,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:34,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:34,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:34,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 311 transitions, 4073 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:34,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:34,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:34,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:35,140 INFO L124 PetriNetUnfolderBase]: 2014/3464 cut-off events. [2024-06-14 11:32:35,140 INFO L125 PetriNetUnfolderBase]: For 160193/160199 co-relation queries the response was YES. [2024-06-14 11:32:35,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21410 conditions, 3464 events. 2014/3464 cut-off events. For 160193/160199 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21968 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21294. Up to 2978 conditions per place. [2024-06-14 11:32:35,174 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-14 11:32:35,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 325 transitions, 4853 flow [2024-06-14 11:32:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:32:35,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 11:32:35,176 INFO L175 Difference]: Start difference. First operand has 239 places, 311 transitions, 4073 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:32:35,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 325 transitions, 4853 flow [2024-06-14 11:32:35,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4755 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:35,623 INFO L231 Difference]: Finished difference. Result has 240 places, 311 transitions, 4119 flow [2024-06-14 11:32:35,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4119, PETRI_PLACES=240, PETRI_TRANSITIONS=311} [2024-06-14 11:32:35,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-14 11:32:35,624 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 311 transitions, 4119 flow [2024-06-14 11:32:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:35,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:35,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:32:35,624 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 11:32:35,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 621287301, now seen corresponding path program 2 times [2024-06-14 11:32:35,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:35,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860407662] [2024-06-14 11:32:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:35,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:35,760 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 11:32:35,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:35,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860407662] [2024-06-14 11:32:35,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860407662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:35,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:35,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:35,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561114856] [2024-06-14 11:32:35,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:35,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:35,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:35,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:35,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:35,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:35,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 311 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:35,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:35,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:35,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:36,278 INFO L124 PetriNetUnfolderBase]: 2019/3468 cut-off events. [2024-06-14 11:32:36,279 INFO L125 PetriNetUnfolderBase]: For 164246/164246 co-relation queries the response was YES. [2024-06-14 11:32:36,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21641 conditions, 3468 events. 2019/3468 cut-off events. For 164246/164246 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21941 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21525. Up to 3013 conditions per place. [2024-06-14 11:32:36,315 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 64 changer transitions 0/330 dead transitions. [2024-06-14 11:32:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 5090 flow [2024-06-14 11:32:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:32:36,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 11:32:36,317 INFO L175 Difference]: Start difference. First operand has 240 places, 311 transitions, 4119 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:32:36,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 5090 flow [2024-06-14 11:32:36,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 330 transitions, 4907 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:36,802 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 4133 flow [2024-06-14 11:32:36,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4133, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-14 11:32:36,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 11:32:36,803 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 4133 flow [2024-06-14 11:32:36,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:36,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:36,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:36,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:32:36,803 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 11:32:36,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 82431405, now seen corresponding path program 5 times [2024-06-14 11:32:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:36,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578570445] [2024-06-14 11:32:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:36,917 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 11:32:36,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:36,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578570445] [2024-06-14 11:32:36,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578570445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:36,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:36,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:36,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689707541] [2024-06-14 11:32:36,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:36,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:36,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:36,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:36,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 4133 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:36,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:36,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:36,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:37,484 INFO L124 PetriNetUnfolderBase]: 2013/3465 cut-off events. [2024-06-14 11:32:37,485 INFO L125 PetriNetUnfolderBase]: For 168760/168766 co-relation queries the response was YES. [2024-06-14 11:32:37,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 3465 events. 2013/3465 cut-off events. For 168760/168766 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22016 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21351. Up to 2994 conditions per place. [2024-06-14 11:32:37,531 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-14 11:32:37,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 4933 flow [2024-06-14 11:32:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 11:32:37,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:32:37,532 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 4133 flow. Second operand 5 states and 126 transitions. [2024-06-14 11:32:37,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 4933 flow [2024-06-14 11:32:38,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 330 transitions, 4800 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:38,004 INFO L231 Difference]: Finished difference. Result has 243 places, 314 transitions, 4132 flow [2024-06-14 11:32:38,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4132, PETRI_PLACES=243, PETRI_TRANSITIONS=314} [2024-06-14 11:32:38,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 11:32:38,005 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 314 transitions, 4132 flow [2024-06-14 11:32:38,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:38,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:38,005 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 11:32:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:32:38,006 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 11:32:38,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash 620841645, now seen corresponding path program 6 times [2024-06-14 11:32:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:38,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725907972] [2024-06-14 11:32:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:38,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:38,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:38,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725907972] [2024-06-14 11:32:38,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725907972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:38,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:38,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958373552] [2024-06-14 11:32:38,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:38,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:38,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:38,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 314 transitions, 4132 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:38,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:38,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:38,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:38,665 INFO L124 PetriNetUnfolderBase]: 2007/3463 cut-off events. [2024-06-14 11:32:38,665 INFO L125 PetriNetUnfolderBase]: For 169920/169926 co-relation queries the response was YES. [2024-06-14 11:32:38,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21379 conditions, 3463 events. 2007/3463 cut-off events. For 169920/169926 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22036 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 21261. Up to 2988 conditions per place. [2024-06-14 11:32:38,702 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 67 changer transitions 0/340 dead transitions. [2024-06-14 11:32:38,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 340 transitions, 4864 flow [2024-06-14 11:32:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:32:38,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:32:38,703 INFO L175 Difference]: Start difference. First operand has 243 places, 314 transitions, 4132 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:32:38,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 340 transitions, 4864 flow [2024-06-14 11:32:39,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 4693 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:39,248 INFO L231 Difference]: Finished difference. Result has 244 places, 314 transitions, 4112 flow [2024-06-14 11:32:39,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4112, PETRI_PLACES=244, PETRI_TRANSITIONS=314} [2024-06-14 11:32:39,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 11:32:39,249 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 314 transitions, 4112 flow [2024-06-14 11:32:39,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:39,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:39,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:39,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:32:39,249 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 11:32:39,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 3 times [2024-06-14 11:32:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:39,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23241812] [2024-06-14 11:32:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:39,359 INFO 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 11:32:39,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23241812] [2024-06-14 11:32:39,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23241812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:39,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:39,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:39,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697831983] [2024-06-14 11:32:39,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:39,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:39,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:39,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:39,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 314 transitions, 4112 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:39,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:39,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:39,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:39,884 INFO L124 PetriNetUnfolderBase]: 2004/3459 cut-off events. [2024-06-14 11:32:39,884 INFO L125 PetriNetUnfolderBase]: For 166550/166556 co-relation queries the response was YES. [2024-06-14 11:32:39,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21296 conditions, 3459 events. 2004/3459 cut-off events. For 166550/166556 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21978 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 21178. Up to 2994 conditions per place. [2024-06-14 11:32:39,920 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 259 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-14 11:32:39,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 331 transitions, 4918 flow [2024-06-14 11:32:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:32:39,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 11:32:39,921 INFO L175 Difference]: Start difference. First operand has 244 places, 314 transitions, 4112 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:32:39,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 331 transitions, 4918 flow [2024-06-14 11:32:40,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 331 transitions, 4762 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:32:40,304 INFO L231 Difference]: Finished difference. Result has 243 places, 314 transitions, 4100 flow [2024-06-14 11:32:40,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4100, PETRI_PLACES=243, PETRI_TRANSITIONS=314} [2024-06-14 11:32:40,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 11:32:40,304 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 314 transitions, 4100 flow [2024-06-14 11:32:40,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:40,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:40,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:32:40,305 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 11:32:40,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash 453652805, now seen corresponding path program 4 times [2024-06-14 11:32:40,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:40,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811091930] [2024-06-14 11:32:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:40,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811091930] [2024-06-14 11:32:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811091930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:40,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:40,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:40,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412768519] [2024-06-14 11:32:40,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:40,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:40,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:40,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:40,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 314 transitions, 4100 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:40,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:40,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:40,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:41,017 INFO L124 PetriNetUnfolderBase]: 2001/3444 cut-off events. [2024-06-14 11:32:41,017 INFO L125 PetriNetUnfolderBase]: For 159930/159930 co-relation queries the response was YES. [2024-06-14 11:32:41,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 3444 events. 2001/3444 cut-off events. For 159930/159930 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21812 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20959. Up to 2991 conditions per place. [2024-06-14 11:32:41,053 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-14 11:32:41,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4772 flow [2024-06-14 11:32:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:32:41,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 11:32:41,054 INFO L175 Difference]: Start difference. First operand has 243 places, 314 transitions, 4100 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:32:41,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4772 flow [2024-06-14 11:32:41,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 327 transitions, 4558 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:32:41,519 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 4026 flow [2024-06-14 11:32:41,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4026, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-14 11:32:41,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 11:32:41,520 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 4026 flow [2024-06-14 11:32:41,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:41,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:41,520 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 11:32:41,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:32:41,521 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 11:32:41,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1012718179, now seen corresponding path program 2 times [2024-06-14 11:32:41,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:41,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842451934] [2024-06-14 11:32:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:41,643 INFO 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 11:32:41,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:41,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842451934] [2024-06-14 11:32:41,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842451934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:41,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:41,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:41,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777528735] [2024-06-14 11:32:41,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:41,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:41,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:41,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:41,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:41,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 4026 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:41,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:41,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:41,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:42,183 INFO L124 PetriNetUnfolderBase]: 2017/3479 cut-off events. [2024-06-14 11:32:42,183 INFO L125 PetriNetUnfolderBase]: For 164565/164571 co-relation queries the response was YES. [2024-06-14 11:32:42,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 3479 events. 2017/3479 cut-off events. For 164565/164571 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22102 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 21047. Up to 2991 conditions per place. [2024-06-14 11:32:42,218 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-14 11:32:42,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 334 transitions, 4778 flow [2024-06-14 11:32:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:32:42,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 11:32:42,219 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 4026 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:32:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 334 transitions, 4778 flow [2024-06-14 11:32:42,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 334 transitions, 4600 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:42,663 INFO L231 Difference]: Finished difference. Result has 242 places, 317 transitions, 4062 flow [2024-06-14 11:32:42,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4062, PETRI_PLACES=242, PETRI_TRANSITIONS=317} [2024-06-14 11:32:42,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 11:32:42,664 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 317 transitions, 4062 flow [2024-06-14 11:32:42,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:42,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:42,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:42,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:32:42,664 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 11:32:42,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1000205959, now seen corresponding path program 3 times [2024-06-14 11:32:42,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:42,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946247935] [2024-06-14 11:32:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:42,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:42,780 INFO 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 11:32:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:42,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946247935] [2024-06-14 11:32:42,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946247935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:42,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:42,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:42,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541425908] [2024-06-14 11:32:42,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:42,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:42,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:42,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:42,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:42,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 317 transitions, 4062 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:42,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:42,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:42,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:43,378 INFO L124 PetriNetUnfolderBase]: 2033/3505 cut-off events. [2024-06-14 11:32:43,379 INFO L125 PetriNetUnfolderBase]: For 163727/163727 co-relation queries the response was YES. [2024-06-14 11:32:43,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21494 conditions, 3505 events. 2033/3505 cut-off events. For 163727/163727 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22272 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21377. Up to 3067 conditions per place. [2024-06-14 11:32:43,408 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 287 selfloop transitions, 46 changer transitions 0/340 dead transitions. [2024-06-14 11:32:43,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 340 transitions, 4840 flow [2024-06-14 11:32:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:32:43,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 11:32:43,409 INFO L175 Difference]: Start difference. First operand has 242 places, 317 transitions, 4062 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:32:43,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 340 transitions, 4840 flow [2024-06-14 11:32:43,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 4648 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:43,804 INFO L231 Difference]: Finished difference. Result has 244 places, 320 transitions, 4036 flow [2024-06-14 11:32:43,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4036, PETRI_PLACES=244, PETRI_TRANSITIONS=320} [2024-06-14 11:32:43,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 11:32:43,805 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 320 transitions, 4036 flow [2024-06-14 11:32:43,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:43,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:43,805 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 11:32:43,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:32:43,806 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 11:32:43,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 690133763, now seen corresponding path program 4 times [2024-06-14 11:32:43,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:43,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872693083] [2024-06-14 11:32:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:43,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:43,921 INFO 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 11:32:43,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:43,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872693083] [2024-06-14 11:32:43,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872693083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:43,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259964137] [2024-06-14 11:32:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:43,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:43,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:43,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:43,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:43,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 320 transitions, 4036 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:43,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:43,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:44,475 INFO L124 PetriNetUnfolderBase]: 2065/3559 cut-off events. [2024-06-14 11:32:44,475 INFO L125 PetriNetUnfolderBase]: For 166951/166951 co-relation queries the response was YES. [2024-06-14 11:32:44,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21810 conditions, 3559 events. 2065/3559 cut-off events. For 166951/166951 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22634 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21692. Up to 3060 conditions per place. [2024-06-14 11:32:44,511 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 294 selfloop transitions, 44 changer transitions 0/345 dead transitions. [2024-06-14 11:32:44,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 345 transitions, 4990 flow [2024-06-14 11:32:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:32:44,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:32:44,513 INFO L175 Difference]: Start difference. First operand has 244 places, 320 transitions, 4036 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:32:44,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 345 transitions, 4990 flow [2024-06-14 11:32:44,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 345 transitions, 4852 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:44,899 INFO L231 Difference]: Finished difference. Result has 247 places, 326 transitions, 4129 flow [2024-06-14 11:32:44,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4129, PETRI_PLACES=247, PETRI_TRANSITIONS=326} [2024-06-14 11:32:44,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 11:32:44,899 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 326 transitions, 4129 flow [2024-06-14 11:32:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:44,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:44,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:44,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:32:44,900 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 11:32:44,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1377285683, now seen corresponding path program 1 times [2024-06-14 11:32:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260331827] [2024-06-14 11:32:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:44,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:45,002 INFO 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 11:32:45,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:45,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260331827] [2024-06-14 11:32:45,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260331827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:45,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:45,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:45,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629345613] [2024-06-14 11:32:45,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:45,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:45,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:45,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:45,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 326 transitions, 4129 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:45,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:45,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:45,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:45,569 INFO L124 PetriNetUnfolderBase]: 2094/3600 cut-off events. [2024-06-14 11:32:45,569 INFO L125 PetriNetUnfolderBase]: For 179641/179641 co-relation queries the response was YES. [2024-06-14 11:32:45,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22403 conditions, 3600 events. 2094/3600 cut-off events. For 179641/179641 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22948 event pairs, 374 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 22283. Up to 3024 conditions per place. [2024-06-14 11:32:45,606 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 83 changer transitions 0/355 dead transitions. [2024-06-14 11:32:45,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 355 transitions, 5105 flow [2024-06-14 11:32:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:32:45,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 11:32:45,608 INFO L175 Difference]: Start difference. First operand has 247 places, 326 transitions, 4129 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:32:45,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 355 transitions, 5105 flow [2024-06-14 11:32:46,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 355 transitions, 4982 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:46,005 INFO L231 Difference]: Finished difference. Result has 252 places, 332 transitions, 4292 flow [2024-06-14 11:32:46,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4292, PETRI_PLACES=252, PETRI_TRANSITIONS=332} [2024-06-14 11:32:46,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-14 11:32:46,005 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 332 transitions, 4292 flow [2024-06-14 11:32:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:46,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:46,006 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 11:32:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:32:46,006 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 11:32:46,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash -35646355, now seen corresponding path program 2 times [2024-06-14 11:32:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:46,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076526225] [2024-06-14 11:32:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:46,113 INFO 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 11:32:46,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076526225] [2024-06-14 11:32:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076526225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:46,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:46,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827969915] [2024-06-14 11:32:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:46,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:46,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:46,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 332 transitions, 4292 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:46,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:46,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:46,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:46,670 INFO L124 PetriNetUnfolderBase]: 2110/3619 cut-off events. [2024-06-14 11:32:46,670 INFO L125 PetriNetUnfolderBase]: For 184785/184785 co-relation queries the response was YES. [2024-06-14 11:32:46,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22768 conditions, 3619 events. 2110/3619 cut-off events. For 184785/184785 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23067 event pairs, 431 based on Foata normal form. 4/3615 useless extension candidates. Maximal degree in co-relation 22646. Up to 3116 conditions per place. [2024-06-14 11:32:46,711 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/353 dead transitions. [2024-06-14 11:32:46,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 353 transitions, 5088 flow [2024-06-14 11:32:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:32:46,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 11:32:46,712 INFO L175 Difference]: Start difference. First operand has 252 places, 332 transitions, 4292 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:32:46,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 353 transitions, 5088 flow [2024-06-14 11:32:47,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 353 transitions, 4898 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:47,108 INFO L231 Difference]: Finished difference. Result has 256 places, 335 transitions, 4330 flow [2024-06-14 11:32:47,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4330, PETRI_PLACES=256, PETRI_TRANSITIONS=335} [2024-06-14 11:32:47,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-14 11:32:47,109 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 335 transitions, 4330 flow [2024-06-14 11:32:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:47,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:47,109 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 11:32:47,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:32:47,109 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 11:32:47,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:47,110 INFO L85 PathProgramCache]: Analyzing trace with hash 82441325, now seen corresponding path program 3 times [2024-06-14 11:32:47,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:47,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934263394] [2024-06-14 11:32:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:47,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:47,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:47,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934263394] [2024-06-14 11:32:47,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934263394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:47,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:47,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:47,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333765098] [2024-06-14 11:32:47,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:47,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:47,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:47,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:47,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:47,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:47,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 335 transitions, 4330 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:47,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:47,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:47,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:47,803 INFO L124 PetriNetUnfolderBase]: 2126/3648 cut-off events. [2024-06-14 11:32:47,803 INFO L125 PetriNetUnfolderBase]: For 189509/189509 co-relation queries the response was YES. [2024-06-14 11:32:47,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22941 conditions, 3648 events. 2126/3648 cut-off events. For 189509/189509 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23264 event pairs, 415 based on Foata normal form. 4/3645 useless extension candidates. Maximal degree in co-relation 22817. Up to 3215 conditions per place. [2024-06-14 11:32:47,843 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/353 dead transitions. [2024-06-14 11:32:47,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 353 transitions, 5098 flow [2024-06-14 11:32:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 11:32:47,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-14 11:32:47,844 INFO L175 Difference]: Start difference. First operand has 256 places, 335 transitions, 4330 flow. Second operand 7 states and 160 transitions. [2024-06-14 11:32:47,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 353 transitions, 5098 flow [2024-06-14 11:32:48,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 353 transitions, 4924 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:48,294 INFO L231 Difference]: Finished difference. Result has 258 places, 338 transitions, 4286 flow [2024-06-14 11:32:48,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=258, PETRI_TRANSITIONS=338} [2024-06-14 11:32:48,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-14 11:32:48,295 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 338 transitions, 4286 flow [2024-06-14 11:32:48,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:48,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:48,295 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 11:32:48,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:32:48,296 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 11:32:48,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash 82626023, now seen corresponding path program 1 times [2024-06-14 11:32:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857417623] [2024-06-14 11:32:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:48,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:48,402 INFO 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 11:32:48,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:48,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857417623] [2024-06-14 11:32:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857417623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:48,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:48,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162480447] [2024-06-14 11:32:48,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:48,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:48,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:48,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 338 transitions, 4286 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:48,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:48,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:48,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:48,945 INFO L124 PetriNetUnfolderBase]: 2142/3671 cut-off events. [2024-06-14 11:32:48,946 INFO L125 PetriNetUnfolderBase]: For 195566/195566 co-relation queries the response was YES. [2024-06-14 11:32:48,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23123 conditions, 3671 events. 2142/3671 cut-off events. For 195566/195566 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23394 event pairs, 424 based on Foata normal form. 4/3668 useless extension candidates. Maximal degree in co-relation 22998. Up to 3190 conditions per place. [2024-06-14 11:32:48,987 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-06-14 11:32:48,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 356 transitions, 5086 flow [2024-06-14 11:32:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 11:32:48,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-14 11:32:48,988 INFO L175 Difference]: Start difference. First operand has 258 places, 338 transitions, 4286 flow. Second operand 7 states and 162 transitions. [2024-06-14 11:32:48,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 356 transitions, 5086 flow [2024-06-14 11:32:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 356 transitions, 4984 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:49,390 INFO L231 Difference]: Finished difference. Result has 260 places, 341 transitions, 4396 flow [2024-06-14 11:32:49,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4396, PETRI_PLACES=260, PETRI_TRANSITIONS=341} [2024-06-14 11:32:49,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-14 11:32:49,391 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 341 transitions, 4396 flow [2024-06-14 11:32:49,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:49,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:49,391 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 11:32:49,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:32:49,391 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 11:32:49,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash 612740723, now seen corresponding path program 4 times [2024-06-14 11:32:49,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:49,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112058691] [2024-06-14 11:32:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:49,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:49,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:49,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112058691] [2024-06-14 11:32:49,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112058691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:49,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:49,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:49,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337802777] [2024-06-14 11:32:49,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:49,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:49,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:49,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 341 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:49,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:49,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:49,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:50,099 INFO L124 PetriNetUnfolderBase]: 2132/3663 cut-off events. [2024-06-14 11:32:50,099 INFO L125 PetriNetUnfolderBase]: For 194226/194226 co-relation queries the response was YES. [2024-06-14 11:32:50,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23017 conditions, 3663 events. 2132/3663 cut-off events. For 194226/194226 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23406 event pairs, 358 based on Foata normal form. 4/3660 useless extension candidates. Maximal degree in co-relation 22891. Up to 3115 conditions per place. [2024-06-14 11:32:50,206 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 76 changer transitions 0/365 dead transitions. [2024-06-14 11:32:50,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 365 transitions, 5172 flow [2024-06-14 11:32:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:32:50,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 11:32:50,207 INFO L175 Difference]: Start difference. First operand has 260 places, 341 transitions, 4396 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:32:50,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 365 transitions, 5172 flow [2024-06-14 11:32:50,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 365 transitions, 4966 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:50,572 INFO L231 Difference]: Finished difference. Result has 262 places, 341 transitions, 4357 flow [2024-06-14 11:32:50,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4357, PETRI_PLACES=262, PETRI_TRANSITIONS=341} [2024-06-14 11:32:50,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-14 11:32:50,573 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 341 transitions, 4357 flow [2024-06-14 11:32:50,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:50,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:50,573 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 11:32:50,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:32:50,573 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 11:32:50,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:50,574 INFO L85 PathProgramCache]: Analyzing trace with hash 681569827, now seen corresponding path program 2 times [2024-06-14 11:32:50,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:50,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877960964] [2024-06-14 11:32:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:50,701 INFO 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 11:32:50,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877960964] [2024-06-14 11:32:50,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877960964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:50,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:50,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274420168] [2024-06-14 11:32:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:50,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:50,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 341 transitions, 4357 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:50,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:50,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:50,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:51,323 INFO L124 PetriNetUnfolderBase]: 2148/3689 cut-off events. [2024-06-14 11:32:51,324 INFO L125 PetriNetUnfolderBase]: For 197518/197518 co-relation queries the response was YES. [2024-06-14 11:32:51,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 3689 events. 2148/3689 cut-off events. For 197518/197518 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23499 event pairs, 400 based on Foata normal form. 4/3690 useless extension candidates. Maximal degree in co-relation 23052. Up to 3240 conditions per place. [2024-06-14 11:32:51,367 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 46 changer transitions 0/364 dead transitions. [2024-06-14 11:32:51,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 364 transitions, 5161 flow [2024-06-14 11:32:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:32:51,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 11:32:51,369 INFO L175 Difference]: Start difference. First operand has 262 places, 341 transitions, 4357 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:32:51,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 364 transitions, 5161 flow [2024-06-14 11:32:51,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 364 transitions, 4997 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:51,733 INFO L231 Difference]: Finished difference. Result has 262 places, 344 transitions, 4337 flow [2024-06-14 11:32:51,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4337, PETRI_PLACES=262, PETRI_TRANSITIONS=344} [2024-06-14 11:32:51,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-14 11:32:51,733 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 344 transitions, 4337 flow [2024-06-14 11:32:51,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:51,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:51,734 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 11:32:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:32:51,734 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 11:32:51,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 3 times [2024-06-14 11:32:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:51,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519894947] [2024-06-14 11:32:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:51,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:51,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:51,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519894947] [2024-06-14 11:32:51,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519894947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:51,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:51,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:51,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339717787] [2024-06-14 11:32:51,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:51,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:51,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:51,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:51,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:51,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:51,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 344 transitions, 4337 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:51,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:51,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:51,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:52,466 INFO L124 PetriNetUnfolderBase]: 2151/3686 cut-off events. [2024-06-14 11:32:52,467 INFO L125 PetriNetUnfolderBase]: For 195644/195644 co-relation queries the response was YES. [2024-06-14 11:32:52,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23018 conditions, 3686 events. 2151/3686 cut-off events. For 195644/195644 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23505 event pairs, 425 based on Foata normal form. 4/3683 useless extension candidates. Maximal degree in co-relation 22890. Up to 3193 conditions per place. [2024-06-14 11:32:52,508 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 283 selfloop transitions, 71 changer transitions 0/361 dead transitions. [2024-06-14 11:32:52,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 361 transitions, 5151 flow [2024-06-14 11:32:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:32:52,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-14 11:32:52,509 INFO L175 Difference]: Start difference. First operand has 262 places, 344 transitions, 4337 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:32:52,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 361 transitions, 5151 flow [2024-06-14 11:32:52,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 361 transitions, 5039 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:52,951 INFO L231 Difference]: Finished difference. Result has 264 places, 347 transitions, 4455 flow [2024-06-14 11:32:52,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4455, PETRI_PLACES=264, PETRI_TRANSITIONS=347} [2024-06-14 11:32:52,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 11:32:52,952 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 347 transitions, 4455 flow [2024-06-14 11:32:52,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:52,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:52,952 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 11:32:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:32:52,952 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 11:32:52,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash 460163797, now seen corresponding path program 4 times [2024-06-14 11:32:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:52,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880762223] [2024-06-14 11:32:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:53,066 INFO 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 11:32:53,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880762223] [2024-06-14 11:32:53,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880762223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:53,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:53,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:53,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634912379] [2024-06-14 11:32:53,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:53,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:53,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:53,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:53,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 347 transitions, 4455 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:53,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:53,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:53,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:53,619 INFO L124 PetriNetUnfolderBase]: 2138/3666 cut-off events. [2024-06-14 11:32:53,619 INFO L125 PetriNetUnfolderBase]: For 191708/191708 co-relation queries the response was YES. [2024-06-14 11:32:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22871 conditions, 3666 events. 2138/3666 cut-off events. For 191708/191708 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23317 event pairs, 394 based on Foata normal form. 4/3667 useless extension candidates. Maximal degree in co-relation 22742. Up to 3168 conditions per place. [2024-06-14 11:32:53,662 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 47 changer transitions 0/365 dead transitions. [2024-06-14 11:32:53,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 365 transitions, 5215 flow [2024-06-14 11:32:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:32:53,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 11:32:53,663 INFO L175 Difference]: Start difference. First operand has 264 places, 347 transitions, 4455 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:32:53,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 365 transitions, 5215 flow [2024-06-14 11:32:54,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 365 transitions, 4995 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:54,166 INFO L231 Difference]: Finished difference. Result has 266 places, 347 transitions, 4337 flow [2024-06-14 11:32:54,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4337, PETRI_PLACES=266, PETRI_TRANSITIONS=347} [2024-06-14 11:32:54,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 11:32:54,167 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 347 transitions, 4337 flow [2024-06-14 11:32:54,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:54,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:54,167 INFO 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 11:32:54,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:32:54,168 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 11:32:54,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1064643134, now seen corresponding path program 1 times [2024-06-14 11:32:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:54,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033739076] [2024-06-14 11:32:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:54,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:54,284 INFO 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 11:32:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:54,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033739076] [2024-06-14 11:32:54,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033739076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:54,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:54,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:54,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750741709] [2024-06-14 11:32:54,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:54,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:54,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:54,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 347 transitions, 4337 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:54,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:54,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:54,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:54,895 INFO L124 PetriNetUnfolderBase]: 2151/3690 cut-off events. [2024-06-14 11:32:54,895 INFO L125 PetriNetUnfolderBase]: For 187827/187833 co-relation queries the response was YES. [2024-06-14 11:32:54,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22754 conditions, 3690 events. 2151/3690 cut-off events. For 187827/187833 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23551 event pairs, 418 based on Foata normal form. 5/3690 useless extension candidates. Maximal degree in co-relation 22624. Up to 3204 conditions per place. [2024-06-14 11:32:54,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-14 11:32:54,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 374 transitions, 5333 flow [2024-06-14 11:32:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:32:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:32:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 11:32:54,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-14 11:32:54,934 INFO L175 Difference]: Start difference. First operand has 266 places, 347 transitions, 4337 flow. Second operand 10 states and 219 transitions. [2024-06-14 11:32:54,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 374 transitions, 5333 flow [2024-06-14 11:32:55,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 374 transitions, 5220 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:55,472 INFO L231 Difference]: Finished difference. Result has 272 places, 353 transitions, 4477 flow [2024-06-14 11:32:55,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4477, PETRI_PLACES=272, PETRI_TRANSITIONS=353} [2024-06-14 11:32:55,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 11:32:55,472 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 353 transitions, 4477 flow [2024-06-14 11:32:55,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:55,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:55,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:55,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:32:55,473 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 11:32:55,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -837720534, now seen corresponding path program 2 times [2024-06-14 11:32:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:55,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521357860] [2024-06-14 11:32:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:55,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:55,569 INFO 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 11:32:55,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:55,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521357860] [2024-06-14 11:32:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521357860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:55,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:55,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24101505] [2024-06-14 11:32:55,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:55,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:55,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:55,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:55,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:55,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:55,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 353 transitions, 4477 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:55,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:55,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:55,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:56,233 INFO L124 PetriNetUnfolderBase]: 2180/3734 cut-off events. [2024-06-14 11:32:56,234 INFO L125 PetriNetUnfolderBase]: For 201338/201344 co-relation queries the response was YES. [2024-06-14 11:32:56,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23366 conditions, 3734 events. 2180/3734 cut-off events. For 201338/201344 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23842 event pairs, 443 based on Foata normal form. 5/3731 useless extension candidates. Maximal degree in co-relation 23234. Up to 3077 conditions per place. [2024-06-14 11:32:56,272 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 137 changer transitions 0/384 dead transitions. [2024-06-14 11:32:56,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 384 transitions, 5723 flow [2024-06-14 11:32:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:32:56,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 11:32:56,273 INFO L175 Difference]: Start difference. First operand has 272 places, 353 transitions, 4477 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:32:56,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 384 transitions, 5723 flow [2024-06-14 11:32:56,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 384 transitions, 5538 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 11:32:56,907 INFO L231 Difference]: Finished difference. Result has 272 places, 365 transitions, 4758 flow [2024-06-14 11:32:56,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4758, PETRI_PLACES=272, PETRI_TRANSITIONS=365} [2024-06-14 11:32:56,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 11:32:56,907 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 365 transitions, 4758 flow [2024-06-14 11:32:56,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:56,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:56,908 INFO 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 11:32:56,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:32:56,908 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 11:32:56,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:56,908 INFO L85 PathProgramCache]: Analyzing trace with hash 123051628, now seen corresponding path program 3 times [2024-06-14 11:32:56,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:56,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369856779] [2024-06-14 11:32:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:56,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:57,004 INFO 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 11:32:57,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369856779] [2024-06-14 11:32:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369856779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:57,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:57,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:57,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897692061] [2024-06-14 11:32:57,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:57,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:57,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:57,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:57,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 365 transitions, 4758 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:57,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:57,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:57,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:57,564 INFO L124 PetriNetUnfolderBase]: 2177/3734 cut-off events. [2024-06-14 11:32:57,564 INFO L125 PetriNetUnfolderBase]: For 203880/203886 co-relation queries the response was YES. [2024-06-14 11:32:57,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23500 conditions, 3734 events. 2177/3734 cut-off events. For 203880/203886 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23876 event pairs, 448 based on Foata normal form. 1/3728 useless extension candidates. Maximal degree in co-relation 23367. Up to 3074 conditions per place. [2024-06-14 11:32:57,609 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 143 changer transitions 0/388 dead transitions. [2024-06-14 11:32:57,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 388 transitions, 5972 flow [2024-06-14 11:32:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:32:57,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 11:32:57,610 INFO L175 Difference]: Start difference. First operand has 272 places, 365 transitions, 4758 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:32:57,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 388 transitions, 5972 flow [2024-06-14 11:32:58,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 388 transitions, 5759 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:58,249 INFO L231 Difference]: Finished difference. Result has 276 places, 365 transitions, 4837 flow [2024-06-14 11:32:58,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4837, PETRI_PLACES=276, PETRI_TRANSITIONS=365} [2024-06-14 11:32:58,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 11:32:58,250 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 365 transitions, 4837 flow [2024-06-14 11:32:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:58,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:58,250 INFO 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 11:32:58,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:32:58,250 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 11:32:58,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash -619396338, now seen corresponding path program 4 times [2024-06-14 11:32:58,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:58,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941292129] [2024-06-14 11:32:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:58,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:58,364 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 11:32:58,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:58,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941292129] [2024-06-14 11:32:58,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941292129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:58,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:58,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:58,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294101287] [2024-06-14 11:32:58,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:58,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:58,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:58,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 365 transitions, 4837 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:58,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:58,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:58,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:59,072 INFO L124 PetriNetUnfolderBase]: 2182/3727 cut-off events. [2024-06-14 11:32:59,072 INFO L125 PetriNetUnfolderBase]: For 210850/210850 co-relation queries the response was YES. [2024-06-14 11:32:59,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23659 conditions, 3727 events. 2182/3727 cut-off events. For 210850/210850 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23775 event pairs, 446 based on Foata normal form. 1/3720 useless extension candidates. Maximal degree in co-relation 23525. Up to 3080 conditions per place. [2024-06-14 11:32:59,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 147 changer transitions 0/388 dead transitions. [2024-06-14 11:32:59,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 5966 flow [2024-06-14 11:32:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:32:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:32:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 11:32:59,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 11:32:59,115 INFO L175 Difference]: Start difference. First operand has 276 places, 365 transitions, 4837 flow. Second operand 8 states and 188 transitions. [2024-06-14 11:32:59,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 5966 flow [2024-06-14 11:32:59,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 388 transitions, 5503 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:32:59,783 INFO L231 Difference]: Finished difference. Result has 278 places, 368 transitions, 4725 flow [2024-06-14 11:32:59,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4725, PETRI_PLACES=278, PETRI_TRANSITIONS=368} [2024-06-14 11:32:59,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 11:32:59,784 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 368 transitions, 4725 flow [2024-06-14 11:32:59,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:59,784 INFO 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 11:32:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:32:59,784 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 11:32:59,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:59,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1562947692, now seen corresponding path program 5 times [2024-06-14 11:32:59,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:59,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73496903] [2024-06-14 11:32:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:59,886 INFO 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 11:32:59,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:59,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73496903] [2024-06-14 11:32:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73496903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:59,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819079236] [2024-06-14 11:32:59,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:59,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:59,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:59,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:32:59,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 368 transitions, 4725 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:59,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:32:59,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:00,496 INFO L124 PetriNetUnfolderBase]: 2187/3754 cut-off events. [2024-06-14 11:33:00,496 INFO L125 PetriNetUnfolderBase]: For 213963/213969 co-relation queries the response was YES. [2024-06-14 11:33:00,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23725 conditions, 3754 events. 2187/3754 cut-off events. For 213963/213969 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24088 event pairs, 419 based on Foata normal form. 5/3754 useless extension candidates. Maximal degree in co-relation 23591. Up to 3256 conditions per place. [2024-06-14 11:33:00,538 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 73 changer transitions 0/391 dead transitions. [2024-06-14 11:33:00,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 391 transitions, 5713 flow [2024-06-14 11:33:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:33:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:33:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 11:33:00,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 11:33:00,540 INFO L175 Difference]: Start difference. First operand has 278 places, 368 transitions, 4725 flow. Second operand 9 states and 201 transitions. [2024-06-14 11:33:00,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 391 transitions, 5713 flow [2024-06-14 11:33:01,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 391 transitions, 5474 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:01,292 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4674 flow [2024-06-14 11:33:01,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4674, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-14 11:33:01,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-14 11:33:01,293 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4674 flow [2024-06-14 11:33:01,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:01,293 INFO 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 11:33:01,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:33:01,293 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 11:33:01,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash -453935574, now seen corresponding path program 6 times [2024-06-14 11:33:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:01,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764590847] [2024-06-14 11:33:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:01,386 INFO 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 11:33:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:01,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764590847] [2024-06-14 11:33:01,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764590847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:01,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:01,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935886328] [2024-06-14 11:33:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:01,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:01,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4674 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:01,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:01,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:01,977 INFO L124 PetriNetUnfolderBase]: 2184/3744 cut-off events. [2024-06-14 11:33:01,978 INFO L125 PetriNetUnfolderBase]: For 218807/218813 co-relation queries the response was YES. [2024-06-14 11:33:02,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3744 events. 2184/3744 cut-off events. For 218807/218813 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23979 event pairs, 443 based on Foata normal form. 5/3741 useless extension candidates. Maximal degree in co-relation 23366. Up to 3083 conditions per place. [2024-06-14 11:33:02,020 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 137 changer transitions 0/386 dead transitions. [2024-06-14 11:33:02,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 386 transitions, 5606 flow [2024-06-14 11:33:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:33:02,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 11:33:02,021 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4674 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:33:02,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 386 transitions, 5606 flow [2024-06-14 11:33:02,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 386 transitions, 5454 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:02,916 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4802 flow [2024-06-14 11:33:02,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4802, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-14 11:33:02,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-14 11:33:02,917 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4802 flow [2024-06-14 11:33:02,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:02,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:02,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:02,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:33:02,918 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 11:33:02,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1209614874, now seen corresponding path program 7 times [2024-06-14 11:33:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:02,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499800086] [2024-06-14 11:33:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:02,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:03,018 INFO 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 11:33:03,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:03,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499800086] [2024-06-14 11:33:03,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499800086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:03,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:03,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:03,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113827089] [2024-06-14 11:33:03,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:03,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:03,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:03,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:03,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:03,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4802 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:03,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:03,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:03,619 INFO L124 PetriNetUnfolderBase]: 2181/3746 cut-off events. [2024-06-14 11:33:03,619 INFO L125 PetriNetUnfolderBase]: For 221418/221424 co-relation queries the response was YES. [2024-06-14 11:33:03,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23679 conditions, 3746 events. 2181/3746 cut-off events. For 221418/221424 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24044 event pairs, 419 based on Foata normal form. 5/3746 useless extension candidates. Maximal degree in co-relation 23542. Up to 3249 conditions per place. [2024-06-14 11:33:03,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 72 changer transitions 0/388 dead transitions. [2024-06-14 11:33:03,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 388 transitions, 5606 flow [2024-06-14 11:33:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:33:03,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 11:33:03,665 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4802 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:33:03,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 388 transitions, 5606 flow [2024-06-14 11:33:04,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 388 transitions, 5163 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:04,391 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4509 flow [2024-06-14 11:33:04,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4359, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4509, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-14 11:33:04,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-14 11:33:04,392 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4509 flow [2024-06-14 11:33:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:04,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:04,392 INFO 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 11:33:04,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:33:04,393 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 11:33:04,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2066228692, now seen corresponding path program 8 times [2024-06-14 11:33:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:04,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416850976] [2024-06-14 11:33:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:04,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:04,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416850976] [2024-06-14 11:33:04,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416850976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:04,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:04,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:04,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659828683] [2024-06-14 11:33:04,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:04,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:04,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:04,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:04,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4509 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:04,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:04,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:04,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:05,122 INFO L124 PetriNetUnfolderBase]: 2202/3781 cut-off events. [2024-06-14 11:33:05,122 INFO L125 PetriNetUnfolderBase]: For 230413/230419 co-relation queries the response was YES. [2024-06-14 11:33:05,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23757 conditions, 3781 events. 2202/3781 cut-off events. For 230413/230419 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24289 event pairs, 419 based on Foata normal form. 5/3781 useless extension candidates. Maximal degree in co-relation 23621. Up to 3137 conditions per place. [2024-06-14 11:33:05,166 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 151 changer transitions 0/408 dead transitions. [2024-06-14 11:33:05,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 408 transitions, 5934 flow [2024-06-14 11:33:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:33:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:33:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 11:33:05,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 11:33:05,167 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4509 flow. Second operand 9 states and 213 transitions. [2024-06-14 11:33:05,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 408 transitions, 5934 flow [2024-06-14 11:33:06,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 408 transitions, 5790 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:06,037 INFO L231 Difference]: Finished difference. Result has 285 places, 380 transitions, 4806 flow [2024-06-14 11:33:06,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4806, PETRI_PLACES=285, PETRI_TRANSITIONS=380} [2024-06-14 11:33:06,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-14 11:33:06,037 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 380 transitions, 4806 flow [2024-06-14 11:33:06,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:06,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:06,038 INFO 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 11:33:06,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:33:06,038 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 11:33:06,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2066223112, now seen corresponding path program 9 times [2024-06-14 11:33:06,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:06,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520282988] [2024-06-14 11:33:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:06,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:06,148 INFO 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 11:33:06,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520282988] [2024-06-14 11:33:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520282988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:06,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:06,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493295720] [2024-06-14 11:33:06,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:06,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:06,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:06,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 380 transitions, 4806 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:06,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:06,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:06,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:06,817 INFO L124 PetriNetUnfolderBase]: 2199/3777 cut-off events. [2024-06-14 11:33:06,817 INFO L125 PetriNetUnfolderBase]: For 234361/234367 co-relation queries the response was YES. [2024-06-14 11:33:06,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23984 conditions, 3777 events. 2199/3777 cut-off events. For 234361/234367 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24239 event pairs, 419 based on Foata normal form. 5/3777 useless extension candidates. Maximal degree in co-relation 23847. Up to 3134 conditions per place. [2024-06-14 11:33:06,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 146 changer transitions 0/410 dead transitions. [2024-06-14 11:33:06,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 410 transitions, 6118 flow [2024-06-14 11:33:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:33:06,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-14 11:33:06,863 INFO L175 Difference]: Start difference. First operand has 285 places, 380 transitions, 4806 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:33:06,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 410 transitions, 6118 flow [2024-06-14 11:33:07,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 410 transitions, 5748 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:07,889 INFO L231 Difference]: Finished difference. Result has 286 places, 380 transitions, 4745 flow [2024-06-14 11:33:07,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4745, PETRI_PLACES=286, PETRI_TRANSITIONS=380} [2024-06-14 11:33:07,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 11:33:07,890 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 380 transitions, 4745 flow [2024-06-14 11:33:07,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:07,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:07,890 INFO 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 11:33:07,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:33:07,890 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 11:33:07,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2074497322, now seen corresponding path program 10 times [2024-06-14 11:33:07,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:07,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387138309] [2024-06-14 11:33:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:07,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:07,992 INFO 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 11:33:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387138309] [2024-06-14 11:33:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387138309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:07,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:07,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:07,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221130533] [2024-06-14 11:33:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:07,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:07,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:08,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:08,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 380 transitions, 4745 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:08,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:08,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:08,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:08,586 INFO L124 PetriNetUnfolderBase]: 2196/3767 cut-off events. [2024-06-14 11:33:08,587 INFO L125 PetriNetUnfolderBase]: For 232597/232603 co-relation queries the response was YES. [2024-06-14 11:33:08,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23813 conditions, 3767 events. 2196/3767 cut-off events. For 232597/232603 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24208 event pairs, 443 based on Foata normal form. 5/3764 useless extension candidates. Maximal degree in co-relation 23676. Up to 3131 conditions per place. [2024-06-14 11:33:08,631 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 130 changer transitions 0/398 dead transitions. [2024-06-14 11:33:08,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 398 transitions, 5859 flow [2024-06-14 11:33:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:33:08,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 11:33:08,632 INFO L175 Difference]: Start difference. First operand has 286 places, 380 transitions, 4745 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:33:08,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 398 transitions, 5859 flow [2024-06-14 11:33:09,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 398 transitions, 5541 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:09,530 INFO L231 Difference]: Finished difference. Result has 285 places, 380 transitions, 4698 flow [2024-06-14 11:33:09,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4698, PETRI_PLACES=285, PETRI_TRANSITIONS=380} [2024-06-14 11:33:09,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-14 11:33:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 380 transitions, 4698 flow [2024-06-14 11:33:09,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:09,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:09,531 INFO 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 11:33:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:33:09,531 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 11:33:09,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2080038262, now seen corresponding path program 11 times [2024-06-14 11:33:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:09,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562487787] [2024-06-14 11:33:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:09,647 INFO 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 11:33:09,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:09,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562487787] [2024-06-14 11:33:09,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562487787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:09,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:09,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:09,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124189129] [2024-06-14 11:33:09,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:09,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:09,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:09,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:09,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 380 transitions, 4698 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:09,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:09,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:09,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:10,343 INFO L124 PetriNetUnfolderBase]: 2209/3784 cut-off events. [2024-06-14 11:33:10,343 INFO L125 PetriNetUnfolderBase]: For 234028/234028 co-relation queries the response was YES. [2024-06-14 11:33:10,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23956 conditions, 3784 events. 2209/3784 cut-off events. For 234028/234028 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 24265 event pairs, 421 based on Foata normal form. 1/3778 useless extension candidates. Maximal degree in co-relation 23819. Up to 3270 conditions per place. [2024-06-14 11:33:10,387 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 82 changer transitions 0/405 dead transitions. [2024-06-14 11:33:10,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 405 transitions, 5772 flow [2024-06-14 11:33:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:33:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:33:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 11:33:10,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-14 11:33:10,389 INFO L175 Difference]: Start difference. First operand has 285 places, 380 transitions, 4698 flow. Second operand 11 states and 236 transitions. [2024-06-14 11:33:10,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 405 transitions, 5772 flow [2024-06-14 11:33:11,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 405 transitions, 5490 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:11,169 INFO L231 Difference]: Finished difference. Result has 292 places, 386 transitions, 4693 flow [2024-06-14 11:33:11,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4693, PETRI_PLACES=292, PETRI_TRANSITIONS=386} [2024-06-14 11:33:11,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-14 11:33:11,170 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 386 transitions, 4693 flow [2024-06-14 11:33:11,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:11,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:11,171 INFO 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 11:33:11,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:33:11,171 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 11:33:11,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1739146970, now seen corresponding path program 12 times [2024-06-14 11:33:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:11,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883272983] [2024-06-14 11:33:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:11,289 INFO 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 11:33:11,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883272983] [2024-06-14 11:33:11,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883272983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:11,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:11,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:11,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112774348] [2024-06-14 11:33:11,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:11,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:11,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:11,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:11,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 386 transitions, 4693 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:11,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:11,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:11,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:11,962 INFO L124 PetriNetUnfolderBase]: 2214/3792 cut-off events. [2024-06-14 11:33:11,962 INFO L125 PetriNetUnfolderBase]: For 239656/239656 co-relation queries the response was YES. [2024-06-14 11:33:11,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23973 conditions, 3792 events. 2214/3792 cut-off events. For 239656/239656 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24365 event pairs, 422 based on Foata normal form. 1/3786 useless extension candidates. Maximal degree in co-relation 23834. Up to 3283 conditions per place. [2024-06-14 11:33:12,006 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 78 changer transitions 0/404 dead transitions. [2024-06-14 11:33:12,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 404 transitions, 5571 flow [2024-06-14 11:33:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:33:12,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 11:33:12,007 INFO L175 Difference]: Start difference. First operand has 292 places, 386 transitions, 4693 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:33:12,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 404 transitions, 5571 flow [2024-06-14 11:33:12,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 404 transitions, 5353 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:12,827 INFO L231 Difference]: Finished difference. Result has 292 places, 389 transitions, 4691 flow [2024-06-14 11:33:12,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4691, PETRI_PLACES=292, PETRI_TRANSITIONS=389} [2024-06-14 11:33:12,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-14 11:33:12,827 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 389 transitions, 4691 flow [2024-06-14 11:33:12,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:12,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:12,828 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] [2024-06-14 11:33:12,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:33:12,828 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 11:33:12,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1733784590, now seen corresponding path program 13 times [2024-06-14 11:33:12,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:12,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130617213] [2024-06-14 11:33:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:12,943 INFO 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 11:33:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:12,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130617213] [2024-06-14 11:33:12,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130617213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198048623] [2024-06-14 11:33:12,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:12,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:12,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 389 transitions, 4691 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:13,646 INFO L124 PetriNetUnfolderBase]: 2211/3789 cut-off events. [2024-06-14 11:33:13,647 INFO L125 PetriNetUnfolderBase]: For 242626/242626 co-relation queries the response was YES. [2024-06-14 11:33:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23895 conditions, 3789 events. 2211/3789 cut-off events. For 242626/242626 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24359 event pairs, 421 based on Foata normal form. 1/3783 useless extension candidates. Maximal degree in co-relation 23755. Up to 3273 conditions per place. [2024-06-14 11:33:13,693 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 85 changer transitions 0/409 dead transitions. [2024-06-14 11:33:13,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 409 transitions, 5541 flow [2024-06-14 11:33:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:33:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:33:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-14 11:33:13,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-06-14 11:33:13,695 INFO L175 Difference]: Start difference. First operand has 292 places, 389 transitions, 4691 flow. Second operand 13 states and 272 transitions. [2024-06-14 11:33:13,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 409 transitions, 5541 flow [2024-06-14 11:33:14,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 409 transitions, 5377 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:14,672 INFO L231 Difference]: Finished difference. Result has 299 places, 389 transitions, 4703 flow [2024-06-14 11:33:14,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4703, PETRI_PLACES=299, PETRI_TRANSITIONS=389} [2024-06-14 11:33:14,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-14 11:33:14,673 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 389 transitions, 4703 flow [2024-06-14 11:33:14,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:14,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:14,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:14,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:33:14,674 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 11:33:14,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash -698183360, now seen corresponding path program 14 times [2024-06-14 11:33:14,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:14,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324299599] [2024-06-14 11:33:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:14,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:14,787 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 11:33:14,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:14,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324299599] [2024-06-14 11:33:14,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324299599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:14,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:14,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:14,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265839873] [2024-06-14 11:33:14,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:14,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:14,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:14,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:14,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 389 transitions, 4703 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:14,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:14,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:14,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:15,466 INFO L124 PetriNetUnfolderBase]: 2208/3785 cut-off events. [2024-06-14 11:33:15,466 INFO L125 PetriNetUnfolderBase]: For 245715/245715 co-relation queries the response was YES. [2024-06-14 11:33:15,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23887 conditions, 3785 events. 2208/3785 cut-off events. For 245715/245715 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24331 event pairs, 420 based on Foata normal form. 1/3779 useless extension candidates. Maximal degree in co-relation 23746. Up to 3146 conditions per place. [2024-06-14 11:33:15,511 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 158 changer transitions 0/416 dead transitions. [2024-06-14 11:33:15,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 416 transitions, 6035 flow [2024-06-14 11:33:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:33:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:33:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 11:33:15,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-14 11:33:15,512 INFO L175 Difference]: Start difference. First operand has 299 places, 389 transitions, 4703 flow. Second operand 11 states and 247 transitions. [2024-06-14 11:33:15,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 416 transitions, 6035 flow [2024-06-14 11:33:16,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 416 transitions, 5855 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 11:33:16,504 INFO L231 Difference]: Finished difference. Result has 298 places, 389 transitions, 4849 flow [2024-06-14 11:33:16,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4849, PETRI_PLACES=298, PETRI_TRANSITIONS=389} [2024-06-14 11:33:16,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-14 11:33:16,505 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 389 transitions, 4849 flow [2024-06-14 11:33:16,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:16,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:16,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:16,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:33:16,505 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 11:33:16,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:16,506 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 15 times [2024-06-14 11:33:16,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:16,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401718887] [2024-06-14 11:33:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:16,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:16,623 INFO 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 11:33:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401718887] [2024-06-14 11:33:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401718887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:16,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344009978] [2024-06-14 11:33:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:16,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:16,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 389 transitions, 4849 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:16,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:16,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:16,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:17,304 INFO L124 PetriNetUnfolderBase]: 2205/3792 cut-off events. [2024-06-14 11:33:17,305 INFO L125 PetriNetUnfolderBase]: For 249500/249506 co-relation queries the response was YES. [2024-06-14 11:33:17,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 3792 events. 2205/3792 cut-off events. For 249500/249506 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24417 event pairs, 417 based on Foata normal form. 5/3792 useless extension candidates. Maximal degree in co-relation 23934. Up to 3143 conditions per place. [2024-06-14 11:33:17,350 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 160 changer transitions 0/416 dead transitions. [2024-06-14 11:33:17,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 416 transitions, 5885 flow [2024-06-14 11:33:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:33:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:33:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 11:33:17,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-14 11:33:17,351 INFO L175 Difference]: Start difference. First operand has 298 places, 389 transitions, 4849 flow. Second operand 10 states and 229 transitions. [2024-06-14 11:33:17,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 416 transitions, 5885 flow [2024-06-14 11:33:18,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 416 transitions, 5585 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:18,430 INFO L231 Difference]: Finished difference. Result has 301 places, 389 transitions, 4881 flow [2024-06-14 11:33:18,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4881, PETRI_PLACES=301, PETRI_TRANSITIONS=389} [2024-06-14 11:33:18,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-14 11:33:18,430 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 389 transitions, 4881 flow [2024-06-14 11:33:18,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:18,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:18,431 INFO 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 11:33:18,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:33:18,431 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 11:33:18,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:18,431 INFO L85 PathProgramCache]: Analyzing trace with hash -703278830, now seen corresponding path program 16 times [2024-06-14 11:33:18,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202537420] [2024-06-14 11:33:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:18,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:18,547 INFO 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 11:33:18,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202537420] [2024-06-14 11:33:18,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202537420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:18,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:18,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966425657] [2024-06-14 11:33:18,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:18,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:18,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:18,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:18,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 389 transitions, 4881 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:18,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:18,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:19,187 INFO L124 PetriNetUnfolderBase]: 2210/3789 cut-off events. [2024-06-14 11:33:19,187 INFO L125 PetriNetUnfolderBase]: For 249752/249752 co-relation queries the response was YES. [2024-06-14 11:33:19,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24103 conditions, 3789 events. 2210/3789 cut-off events. For 249752/249752 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24380 event pairs, 422 based on Foata normal form. 1/3783 useless extension candidates. Maximal degree in co-relation 23960. Up to 3149 conditions per place. [2024-06-14 11:33:19,233 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 158 changer transitions 0/414 dead transitions. [2024-06-14 11:33:19,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 414 transitions, 5937 flow [2024-06-14 11:33:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 11:33:19,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 11:33:19,234 INFO L175 Difference]: Start difference. First operand has 301 places, 389 transitions, 4881 flow. Second operand 8 states and 190 transitions. [2024-06-14 11:33:19,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 414 transitions, 5937 flow [2024-06-14 11:33:20,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 414 transitions, 5559 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 11:33:20,204 INFO L231 Difference]: Finished difference. Result has 300 places, 392 transitions, 4867 flow [2024-06-14 11:33:20,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4867, PETRI_PLACES=300, PETRI_TRANSITIONS=392} [2024-06-14 11:33:20,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-14 11:33:20,204 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 392 transitions, 4867 flow [2024-06-14 11:33:20,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:20,205 INFO 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 11:33:20,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:33:20,205 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 11:33:20,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:20,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1178343622, now seen corresponding path program 17 times [2024-06-14 11:33:20,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:20,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246355936] [2024-06-14 11:33:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:20,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:20,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246355936] [2024-06-14 11:33:20,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246355936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:20,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:20,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:20,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788447241] [2024-06-14 11:33:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:20,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:20,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:20,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:20,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 392 transitions, 4867 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:20,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:20,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:20,980 INFO L124 PetriNetUnfolderBase]: 2207/3786 cut-off events. [2024-06-14 11:33:20,981 INFO L125 PetriNetUnfolderBase]: For 246446/246446 co-relation queries the response was YES. [2024-06-14 11:33:21,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23960 conditions, 3786 events. 2207/3786 cut-off events. For 246446/246446 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24372 event pairs, 420 based on Foata normal form. 1/3780 useless extension candidates. Maximal degree in co-relation 23816. Up to 3146 conditions per place. [2024-06-14 11:33:21,028 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 161 changer transitions 0/419 dead transitions. [2024-06-14 11:33:21,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 419 transitions, 5907 flow [2024-06-14 11:33:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:33:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:33:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-14 11:33:21,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-14 11:33:21,029 INFO L175 Difference]: Start difference. First operand has 300 places, 392 transitions, 4867 flow. Second operand 13 states and 282 transitions. [2024-06-14 11:33:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 419 transitions, 5907 flow [2024-06-14 11:33:22,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 419 transitions, 5642 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:22,126 INFO L231 Difference]: Finished difference. Result has 307 places, 392 transitions, 4936 flow [2024-06-14 11:33:22,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4936, PETRI_PLACES=307, PETRI_TRANSITIONS=392} [2024-06-14 11:33:22,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 11:33:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 392 transitions, 4936 flow [2024-06-14 11:33:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:22,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:22,138 INFO 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 11:33:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:33:22,139 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 11:33:22,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash -346395850, now seen corresponding path program 18 times [2024-06-14 11:33:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:22,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449741032] [2024-06-14 11:33:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:22,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:22,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:22,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449741032] [2024-06-14 11:33:22,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449741032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:22,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:22,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:22,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285475999] [2024-06-14 11:33:22,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:22,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:22,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:22,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:22,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 392 transitions, 4936 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:22,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:22,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:22,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:22,999 INFO L124 PetriNetUnfolderBase]: 2204/3791 cut-off events. [2024-06-14 11:33:22,999 INFO L125 PetriNetUnfolderBase]: For 242139/242139 co-relation queries the response was YES. [2024-06-14 11:33:23,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23911 conditions, 3791 events. 2204/3791 cut-off events. For 242139/242139 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24389 event pairs, 398 based on Foata normal form. 1/3789 useless extension candidates. Maximal degree in co-relation 23767. Up to 3288 conditions per place. [2024-06-14 11:33:23,039 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 56 changer transitions 0/416 dead transitions. [2024-06-14 11:33:23,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 416 transitions, 5994 flow [2024-06-14 11:33:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:33:23,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-14 11:33:23,041 INFO L175 Difference]: Start difference. First operand has 307 places, 392 transitions, 4936 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:33:23,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 416 transitions, 5994 flow [2024-06-14 11:33:24,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 416 transitions, 5584 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-14 11:33:24,162 INFO L231 Difference]: Finished difference. Result has 300 places, 393 transitions, 4710 flow [2024-06-14 11:33:24,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4710, PETRI_PLACES=300, PETRI_TRANSITIONS=393} [2024-06-14 11:33:24,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-14 11:33:24,163 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 393 transitions, 4710 flow [2024-06-14 11:33:24,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:24,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:24,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:24,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:33:24,164 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 11:33:24,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -346662760, now seen corresponding path program 19 times [2024-06-14 11:33:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:24,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644456290] [2024-06-14 11:33:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:24,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:24,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:24,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644456290] [2024-06-14 11:33:24,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644456290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:24,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:24,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:24,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298403297] [2024-06-14 11:33:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:24,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:24,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:24,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:24,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:24,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 393 transitions, 4710 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:24,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:24,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:24,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:24,905 INFO L124 PetriNetUnfolderBase]: 2201/3787 cut-off events. [2024-06-14 11:33:24,905 INFO L125 PetriNetUnfolderBase]: For 238590/238590 co-relation queries the response was YES. [2024-06-14 11:33:24,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23617 conditions, 3787 events. 2201/3787 cut-off events. For 238590/238590 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24395 event pairs, 398 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 23472. Up to 3285 conditions per place. [2024-06-14 11:33:24,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 59 changer transitions 0/415 dead transitions. [2024-06-14 11:33:24,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 415 transitions, 5582 flow [2024-06-14 11:33:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:33:24,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-14 11:33:24,951 INFO L175 Difference]: Start difference. First operand has 300 places, 393 transitions, 4710 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:33:24,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 415 transitions, 5582 flow [2024-06-14 11:33:26,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 415 transitions, 5495 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:26,045 INFO L231 Difference]: Finished difference. Result has 303 places, 393 transitions, 4755 flow [2024-06-14 11:33:26,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4755, PETRI_PLACES=303, PETRI_TRANSITIONS=393} [2024-06-14 11:33:26,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 11:33:26,046 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 393 transitions, 4755 flow [2024-06-14 11:33:26,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:26,046 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] [2024-06-14 11:33:26,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:33:26,047 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 11:33:26,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:26,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1106909654, now seen corresponding path program 1 times [2024-06-14 11:33:26,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:26,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078916568] [2024-06-14 11:33:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:26,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:26,158 INFO 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 11:33:26,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078916568] [2024-06-14 11:33:26,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078916568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:26,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:26,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789546560] [2024-06-14 11:33:26,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:26,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:26,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:26,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:26,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 393 transitions, 4755 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:26,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:26,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:26,833 INFO L124 PetriNetUnfolderBase]: 2320/3979 cut-off events. [2024-06-14 11:33:26,833 INFO L125 PetriNetUnfolderBase]: For 324868/324868 co-relation queries the response was YES. [2024-06-14 11:33:26,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26046 conditions, 3979 events. 2320/3979 cut-off events. For 324868/324868 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25817 event pairs, 447 based on Foata normal form. 12/3983 useless extension candidates. Maximal degree in co-relation 25900. Up to 2982 conditions per place. [2024-06-14 11:33:26,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 185 changer transitions 0/427 dead transitions. [2024-06-14 11:33:26,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 5939 flow [2024-06-14 11:33:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:33:26,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:33:26,884 INFO L175 Difference]: Start difference. First operand has 303 places, 393 transitions, 4755 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:33:26,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 5939 flow [2024-06-14 11:33:27,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 427 transitions, 5656 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:27,988 INFO L231 Difference]: Finished difference. Result has 303 places, 397 transitions, 4947 flow [2024-06-14 11:33:27,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4947, PETRI_PLACES=303, PETRI_TRANSITIONS=397} [2024-06-14 11:33:27,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 11:33:27,989 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 397 transitions, 4947 flow [2024-06-14 11:33:27,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:27,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:27,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:27,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:33:27,989 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 11:33:27,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash -250154076, now seen corresponding path program 2 times [2024-06-14 11:33:27,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:27,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565723278] [2024-06-14 11:33:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:27,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:28,101 INFO 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 11:33:28,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:28,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565723278] [2024-06-14 11:33:28,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565723278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:28,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:28,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610756020] [2024-06-14 11:33:28,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:28,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:28,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:28,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 397 transitions, 4947 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:28,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:28,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:28,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:28,824 INFO L124 PetriNetUnfolderBase]: 2452/4178 cut-off events. [2024-06-14 11:33:28,825 INFO L125 PetriNetUnfolderBase]: For 387078/387078 co-relation queries the response was YES. [2024-06-14 11:33:28,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29149 conditions, 4178 events. 2452/4178 cut-off events. For 387078/387078 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27142 event pairs, 518 based on Foata normal form. 12/4182 useless extension candidates. Maximal degree in co-relation 29002. Up to 3336 conditions per place. [2024-06-14 11:33:28,877 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 177 changer transitions 0/427 dead transitions. [2024-06-14 11:33:28,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 6131 flow [2024-06-14 11:33:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 11:33:28,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 11:33:28,878 INFO L175 Difference]: Start difference. First operand has 303 places, 397 transitions, 4947 flow. Second operand 8 states and 193 transitions. [2024-06-14 11:33:28,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 6131 flow [2024-06-14 11:33:30,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 427 transitions, 5870 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:30,108 INFO L231 Difference]: Finished difference. Result has 307 places, 401 transitions, 5153 flow [2024-06-14 11:33:30,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5153, PETRI_PLACES=307, PETRI_TRANSITIONS=401} [2024-06-14 11:33:30,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 11:33:30,109 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 401 transitions, 5153 flow [2024-06-14 11:33:30,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:30,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:30,109 INFO 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 11:33:30,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:33:30,110 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 11:33:30,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1018196024, now seen corresponding path program 3 times [2024-06-14 11:33:30,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:30,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047555544] [2024-06-14 11:33:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:30,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:30,226 INFO 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 11:33:30,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047555544] [2024-06-14 11:33:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047555544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:30,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:30,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:30,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868571466] [2024-06-14 11:33:30,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:30,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:30,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:30,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:30,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:30,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 401 transitions, 5153 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:30,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:30,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:30,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:30,964 INFO L124 PetriNetUnfolderBase]: 2416/4126 cut-off events. [2024-06-14 11:33:30,964 INFO L125 PetriNetUnfolderBase]: For 356277/356277 co-relation queries the response was YES. [2024-06-14 11:33:31,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27789 conditions, 4126 events. 2416/4126 cut-off events. For 356277/356277 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26871 event pairs, 514 based on Foata normal form. 16/4134 useless extension candidates. Maximal degree in co-relation 27640. Up to 3380 conditions per place. [2024-06-14 11:33:31,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 173 changer transitions 0/423 dead transitions. [2024-06-14 11:33:31,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 423 transitions, 6053 flow [2024-06-14 11:33:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 11:33:31,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:33:31,017 INFO L175 Difference]: Start difference. First operand has 307 places, 401 transitions, 5153 flow. Second operand 8 states and 189 transitions. [2024-06-14 11:33:31,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 423 transitions, 6053 flow [2024-06-14 11:33:32,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 423 transitions, 5798 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:32,258 INFO L231 Difference]: Finished difference. Result has 311 places, 401 transitions, 5250 flow [2024-06-14 11:33:32,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4898, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=311, PETRI_TRANSITIONS=401} [2024-06-14 11:33:32,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-14 11:33:32,261 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 401 transitions, 5250 flow [2024-06-14 11:33:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:32,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:32,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:32,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:33:32,262 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 11:33:32,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:32,262 INFO L85 PathProgramCache]: Analyzing trace with hash -971091382, now seen corresponding path program 4 times [2024-06-14 11:33:32,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:32,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139691170] [2024-06-14 11:33:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:32,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:32,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:32,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139691170] [2024-06-14 11:33:32,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139691170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:32,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:32,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:32,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818670431] [2024-06-14 11:33:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:32,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:32,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:32,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:32,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 401 transitions, 5250 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:32,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:32,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:32,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:33,119 INFO L124 PetriNetUnfolderBase]: 2472/4230 cut-off events. [2024-06-14 11:33:33,120 INFO L125 PetriNetUnfolderBase]: For 363555/363555 co-relation queries the response was YES. [2024-06-14 11:33:33,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28589 conditions, 4230 events. 2472/4230 cut-off events. For 363555/363555 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27663 event pairs, 493 based on Foata normal form. 16/4239 useless extension candidates. Maximal degree in co-relation 28438. Up to 3630 conditions per place. [2024-06-14 11:33:33,174 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 78 changer transitions 0/422 dead transitions. [2024-06-14 11:33:33,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 6190 flow [2024-06-14 11:33:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 11:33:33,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-14 11:33:33,175 INFO L175 Difference]: Start difference. First operand has 311 places, 401 transitions, 5250 flow. Second operand 8 states and 185 transitions. [2024-06-14 11:33:33,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 6190 flow [2024-06-14 11:33:34,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 422 transitions, 5836 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:34,424 INFO L231 Difference]: Finished difference. Result has 312 places, 403 transitions, 5112 flow [2024-06-14 11:33:34,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5112, PETRI_PLACES=312, PETRI_TRANSITIONS=403} [2024-06-14 11:33:34,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-14 11:33:34,425 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 403 transitions, 5112 flow [2024-06-14 11:33:34,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:34,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:34,426 INFO 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 11:33:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:33:34,426 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 11:33:34,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1739284920, now seen corresponding path program 5 times [2024-06-14 11:33:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541098956] [2024-06-14 11:33:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:34,551 INFO 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 11:33:34,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:34,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541098956] [2024-06-14 11:33:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541098956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:34,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:34,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744667388] [2024-06-14 11:33:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:34,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 403 transitions, 5112 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:34,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:35,355 INFO L124 PetriNetUnfolderBase]: 2604/4434 cut-off events. [2024-06-14 11:33:35,355 INFO L125 PetriNetUnfolderBase]: For 416092/416092 co-relation queries the response was YES. [2024-06-14 11:33:35,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31222 conditions, 4434 events. 2604/4434 cut-off events. For 416092/416092 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29165 event pairs, 513 based on Foata normal form. 12/4439 useless extension candidates. Maximal degree in co-relation 31070. Up to 3674 conditions per place. [2024-06-14 11:33:35,410 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 84 changer transitions 0/430 dead transitions. [2024-06-14 11:33:35,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 430 transitions, 6304 flow [2024-06-14 11:33:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 11:33:35,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 11:33:35,411 INFO L175 Difference]: Start difference. First operand has 312 places, 403 transitions, 5112 flow. Second operand 8 states and 188 transitions. [2024-06-14 11:33:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 430 transitions, 6304 flow [2024-06-14 11:33:36,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 430 transitions, 6124 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:36,940 INFO L231 Difference]: Finished difference. Result has 314 places, 407 transitions, 5217 flow [2024-06-14 11:33:36,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5217, PETRI_PLACES=314, PETRI_TRANSITIONS=407} [2024-06-14 11:33:36,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 11:33:36,941 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 407 transitions, 5217 flow [2024-06-14 11:33:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:36,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:36,941 INFO 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 11:33:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:33:36,941 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 11:33:36,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1733774670, now seen corresponding path program 6 times [2024-06-14 11:33:36,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:36,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770515754] [2024-06-14 11:33:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:36,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:37,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:37,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770515754] [2024-06-14 11:33:37,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770515754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:37,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:37,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:37,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719665129] [2024-06-14 11:33:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:37,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:37,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:37,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:37,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:37,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:37,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 407 transitions, 5217 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:37,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:37,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:37,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:37,870 INFO L124 PetriNetUnfolderBase]: 2568/4382 cut-off events. [2024-06-14 11:33:37,871 INFO L125 PetriNetUnfolderBase]: For 384402/384402 co-relation queries the response was YES. [2024-06-14 11:33:37,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29604 conditions, 4382 events. 2568/4382 cut-off events. For 384402/384402 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28864 event pairs, 509 based on Foata normal form. 16/4391 useless extension candidates. Maximal degree in co-relation 29451. Up to 3782 conditions per place. [2024-06-14 11:33:37,927 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 79 changer transitions 0/428 dead transitions. [2024-06-14 11:33:37,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 428 transitions, 6123 flow [2024-06-14 11:33:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:33:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:33:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 11:33:37,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261904761904762 [2024-06-14 11:33:37,928 INFO L175 Difference]: Start difference. First operand has 314 places, 407 transitions, 5217 flow. Second operand 10 states and 221 transitions. [2024-06-14 11:33:37,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 428 transitions, 6123 flow [2024-06-14 11:33:39,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 428 transitions, 5968 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:39,144 INFO L231 Difference]: Finished difference. Result has 320 places, 407 transitions, 5226 flow [2024-06-14 11:33:39,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5226, PETRI_PLACES=320, PETRI_TRANSITIONS=407} [2024-06-14 11:33:39,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-14 11:33:39,145 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 407 transitions, 5226 flow [2024-06-14 11:33:39,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:39,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:39,145 INFO 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 11:33:39,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:33:39,145 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 11:33:39,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1733559468, now seen corresponding path program 1 times [2024-06-14 11:33:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:39,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061229733] [2024-06-14 11:33:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:39,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:39,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061229733] [2024-06-14 11:33:39,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061229733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:39,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:39,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18142351] [2024-06-14 11:33:39,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:39,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:39,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:39,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:39,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 407 transitions, 5226 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:39,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:39,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:39,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:40,113 INFO L124 PetriNetUnfolderBase]: 2608/4454 cut-off events. [2024-06-14 11:33:40,113 INFO L125 PetriNetUnfolderBase]: For 376541/376541 co-relation queries the response was YES. [2024-06-14 11:33:40,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29978 conditions, 4454 events. 2608/4454 cut-off events. For 376541/376541 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29367 event pairs, 511 based on Foata normal form. 12/4459 useless extension candidates. Maximal degree in co-relation 29823. Up to 3722 conditions per place. [2024-06-14 11:33:40,174 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-06-14 11:33:40,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 433 transitions, 6208 flow [2024-06-14 11:33:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:33:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:33:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 11:33:40,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-14 11:33:40,175 INFO L175 Difference]: Start difference. First operand has 320 places, 407 transitions, 5226 flow. Second operand 10 states and 223 transitions. [2024-06-14 11:33:40,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 433 transitions, 6208 flow [2024-06-14 11:33:41,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 433 transitions, 6034 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 11:33:41,645 INFO L231 Difference]: Finished difference. Result has 321 places, 409 transitions, 5285 flow [2024-06-14 11:33:41,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5285, PETRI_PLACES=321, PETRI_TRANSITIONS=409} [2024-06-14 11:33:41,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-14 11:33:41,646 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 409 transitions, 5285 flow [2024-06-14 11:33:41,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:41,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:41,646 INFO 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 11:33:41,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:33:41,647 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 11:33:41,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1173250632, now seen corresponding path program 7 times [2024-06-14 11:33:41,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:41,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93314348] [2024-06-14 11:33:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:41,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:41,780 INFO 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 11:33:41,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:41,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93314348] [2024-06-14 11:33:41,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93314348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:41,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:41,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:41,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766381825] [2024-06-14 11:33:41,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:41,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:41,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:41,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:41,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 409 transitions, 5285 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:41,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:41,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:41,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:42,703 INFO L124 PetriNetUnfolderBase]: 2664/4542 cut-off events. [2024-06-14 11:33:42,703 INFO L125 PetriNetUnfolderBase]: For 403003/403003 co-relation queries the response was YES. [2024-06-14 11:33:42,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30814 conditions, 4542 events. 2664/4542 cut-off events. For 403003/403003 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30064 event pairs, 529 based on Foata normal form. 16/4551 useless extension candidates. Maximal degree in co-relation 30658. Up to 3741 conditions per place. [2024-06-14 11:33:42,765 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 163 changer transitions 0/436 dead transitions. [2024-06-14 11:33:42,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 436 transitions, 6277 flow [2024-06-14 11:33:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:33:42,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:33:42,766 INFO L175 Difference]: Start difference. First operand has 321 places, 409 transitions, 5285 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:33:42,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 436 transitions, 6277 flow [2024-06-14 11:33:44,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 436 transitions, 6070 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:44,227 INFO L231 Difference]: Finished difference. Result has 321 places, 411 transitions, 5476 flow [2024-06-14 11:33:44,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5476, PETRI_PLACES=321, PETRI_TRANSITIONS=411} [2024-06-14 11:33:44,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-14 11:33:44,228 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 411 transitions, 5476 flow [2024-06-14 11:33:44,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:44,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:44,228 INFO 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 11:33:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:33:44,228 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 11:33:44,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 8 times [2024-06-14 11:33:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:44,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328813485] [2024-06-14 11:33:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:44,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328813485] [2024-06-14 11:33:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328813485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:44,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:44,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:44,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112817415] [2024-06-14 11:33:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:44,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:44,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 411 transitions, 5476 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:44,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:44,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:44,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:45,180 INFO L124 PetriNetUnfolderBase]: 2720/4638 cut-off events. [2024-06-14 11:33:45,180 INFO L125 PetriNetUnfolderBase]: For 414064/414064 co-relation queries the response was YES. [2024-06-14 11:33:45,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31672 conditions, 4638 events. 2720/4638 cut-off events. For 414064/414064 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 30833 event pairs, 541 based on Foata normal form. 16/4647 useless extension candidates. Maximal degree in co-relation 31515. Up to 3829 conditions per place. [2024-06-14 11:33:45,237 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 267 selfloop transitions, 166 changer transitions 0/440 dead transitions. [2024-06-14 11:33:45,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 440 transitions, 6484 flow [2024-06-14 11:33:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:33:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:33:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 11:33:45,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 11:33:45,239 INFO L175 Difference]: Start difference. First operand has 321 places, 411 transitions, 5476 flow. Second operand 10 states and 230 transitions. [2024-06-14 11:33:45,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 440 transitions, 6484 flow [2024-06-14 11:33:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 440 transitions, 6128 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:46,527 INFO L231 Difference]: Finished difference. Result has 325 places, 413 transitions, 5528 flow [2024-06-14 11:33:46,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5528, PETRI_PLACES=325, PETRI_TRANSITIONS=413} [2024-06-14 11:33:46,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-14 11:33:46,527 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 413 transitions, 5528 flow [2024-06-14 11:33:46,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:46,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:46,528 INFO 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 11:33:46,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:33:46,528 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 11:33:46,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1173102762, now seen corresponding path program 9 times [2024-06-14 11:33:46,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:46,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498440048] [2024-06-14 11:33:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:46,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:46,643 INFO 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 11:33:46,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:46,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498440048] [2024-06-14 11:33:46,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498440048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:46,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:46,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:46,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053291180] [2024-06-14 11:33:46,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:46,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:46,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:46,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:46,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:46,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 413 transitions, 5528 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:46,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:46,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:46,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:47,457 INFO L124 PetriNetUnfolderBase]: 2760/4707 cut-off events. [2024-06-14 11:33:47,457 INFO L125 PetriNetUnfolderBase]: For 399762/399762 co-relation queries the response was YES. [2024-06-14 11:33:47,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32020 conditions, 4707 events. 2760/4707 cut-off events. For 399762/399762 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31404 event pairs, 474 based on Foata normal form. 12/4712 useless extension candidates. Maximal degree in co-relation 31862. Up to 3499 conditions per place. [2024-06-14 11:33:47,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 179 changer transitions 0/447 dead transitions. [2024-06-14 11:33:47,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 447 transitions, 6740 flow [2024-06-14 11:33:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:33:47,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-14 11:33:47,522 INFO L175 Difference]: Start difference. First operand has 325 places, 413 transitions, 5528 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:33:47,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 447 transitions, 6740 flow [2024-06-14 11:33:48,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 447 transitions, 6368 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-14 11:33:48,855 INFO L231 Difference]: Finished difference. Result has 323 places, 415 transitions, 5586 flow [2024-06-14 11:33:48,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5586, PETRI_PLACES=323, PETRI_TRANSITIONS=415} [2024-06-14 11:33:48,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-14 11:33:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 415 transitions, 5586 flow [2024-06-14 11:33:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:48,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:48,856 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] [2024-06-14 11:33:48,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:33:48,857 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 11:33:48,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 10 times [2024-06-14 11:33:48,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:48,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710648675] [2024-06-14 11:33:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:48,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:48,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710648675] [2024-06-14 11:33:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710648675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:48,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:48,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581831431] [2024-06-14 11:33:48,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:49,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:49,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 415 transitions, 5586 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:49,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:49,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:49,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:49,851 INFO L124 PetriNetUnfolderBase]: 2778/4747 cut-off events. [2024-06-14 11:33:49,852 INFO L125 PetriNetUnfolderBase]: For 384540/384540 co-relation queries the response was YES. [2024-06-14 11:33:49,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31541 conditions, 4747 events. 2778/4747 cut-off events. For 384540/384540 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31657 event pairs, 464 based on Foata normal form. 16/4760 useless extension candidates. Maximal degree in co-relation 31384. Up to 4084 conditions per place. [2024-06-14 11:33:49,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 374 selfloop transitions, 67 changer transitions 0/448 dead transitions. [2024-06-14 11:33:49,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 448 transitions, 6619 flow [2024-06-14 11:33:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:33:49,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 11:33:49,915 INFO L175 Difference]: Start difference. First operand has 323 places, 415 transitions, 5586 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:33:49,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 448 transitions, 6619 flow [2024-06-14 11:33:51,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 448 transitions, 6061 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:51,570 INFO L231 Difference]: Finished difference. Result has 322 places, 418 transitions, 5243 flow [2024-06-14 11:33:51,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5243, PETRI_PLACES=322, PETRI_TRANSITIONS=418} [2024-06-14 11:33:51,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-14 11:33:51,571 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 418 transitions, 5243 flow [2024-06-14 11:33:51,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:51,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:51,571 INFO 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 11:33:51,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:33:51,571 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 11:33:51,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:51,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1178828214, now seen corresponding path program 2 times [2024-06-14 11:33:51,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:51,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806188657] [2024-06-14 11:33:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:51,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806188657] [2024-06-14 11:33:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806188657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:51,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:51,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:51,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898803545] [2024-06-14 11:33:51,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:51,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:51,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:51,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:51,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 418 transitions, 5243 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:51,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:51,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:51,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:52,606 INFO L124 PetriNetUnfolderBase]: 2818/4804 cut-off events. [2024-06-14 11:33:52,606 INFO L125 PetriNetUnfolderBase]: For 368616/368616 co-relation queries the response was YES. [2024-06-14 11:33:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30937 conditions, 4804 events. 2818/4804 cut-off events. For 368616/368616 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32055 event pairs, 535 based on Foata normal form. 12/4809 useless extension candidates. Maximal degree in co-relation 30781. Up to 3739 conditions per place. [2024-06-14 11:33:52,662 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 180 changer transitions 0/450 dead transitions. [2024-06-14 11:33:52,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 450 transitions, 6279 flow [2024-06-14 11:33:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:33:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:33:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-14 11:33:52,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-14 11:33:52,663 INFO L175 Difference]: Start difference. First operand has 322 places, 418 transitions, 5243 flow. Second operand 10 states and 232 transitions. [2024-06-14 11:33:52,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 450 transitions, 6279 flow [2024-06-14 11:33:54,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 450 transitions, 6125 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:54,066 INFO L231 Difference]: Finished difference. Result has 327 places, 420 transitions, 5517 flow [2024-06-14 11:33:54,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5517, PETRI_PLACES=327, PETRI_TRANSITIONS=420} [2024-06-14 11:33:54,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-14 11:33:54,066 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 420 transitions, 5517 flow [2024-06-14 11:33:54,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:54,066 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] [2024-06-14 11:33:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:33:54,067 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 11:33:54,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2014759392, now seen corresponding path program 3 times [2024-06-14 11:33:54,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:54,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553864242] [2024-06-14 11:33:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:54,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:54,183 INFO 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 11:33:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:54,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553864242] [2024-06-14 11:33:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553864242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:54,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:54,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460653948] [2024-06-14 11:33:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:54,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:54,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:54,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 420 transitions, 5517 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:54,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:54,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:55,021 INFO L124 PetriNetUnfolderBase]: 2858/4889 cut-off events. [2024-06-14 11:33:55,021 INFO L125 PetriNetUnfolderBase]: For 376446/376446 co-relation queries the response was YES. [2024-06-14 11:33:55,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31807 conditions, 4889 events. 2858/4889 cut-off events. For 376446/376446 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32809 event pairs, 476 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 31650. Up to 4152 conditions per place. [2024-06-14 11:33:55,087 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 69 changer transitions 0/452 dead transitions. [2024-06-14 11:33:55,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 452 transitions, 6563 flow [2024-06-14 11:33:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:33:55,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 11:33:55,088 INFO L175 Difference]: Start difference. First operand has 327 places, 420 transitions, 5517 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:33:55,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 452 transitions, 6563 flow [2024-06-14 11:33:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 452 transitions, 6161 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:56,887 INFO L231 Difference]: Finished difference. Result has 326 places, 422 transitions, 5322 flow [2024-06-14 11:33:56,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5322, PETRI_PLACES=326, PETRI_TRANSITIONS=422} [2024-06-14 11:33:56,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-14 11:33:56,888 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 422 transitions, 5322 flow [2024-06-14 11:33:56,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:56,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:56,890 INFO 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 11:33:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:33:56,890 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 11:33:56,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-14 11:33:56,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:56,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831167488] [2024-06-14 11:33:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:56,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:57,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831167488] [2024-06-14 11:33:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831167488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:57,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:57,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:57,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650910345] [2024-06-14 11:33:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:57,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:57,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:57,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:57,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 422 transitions, 5322 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:57,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:57,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:57,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:57,933 INFO L124 PetriNetUnfolderBase]: 2924/5001 cut-off events. [2024-06-14 11:33:57,934 INFO L125 PetriNetUnfolderBase]: For 393029/393029 co-relation queries the response was YES. [2024-06-14 11:33:57,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32503 conditions, 5001 events. 2924/5001 cut-off events. For 393029/393029 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33742 event pairs, 457 based on Foata normal form. 12/5010 useless extension candidates. Maximal degree in co-relation 32345. Up to 3972 conditions per place. [2024-06-14 11:33:57,992 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 72 changer transitions 0/454 dead transitions. [2024-06-14 11:33:57,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 454 transitions, 6564 flow [2024-06-14 11:33:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:33:57,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 11:33:57,993 INFO L175 Difference]: Start difference. First operand has 326 places, 422 transitions, 5322 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:33:57,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 454 transitions, 6564 flow [2024-06-14 11:33:59,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 454 transitions, 6387 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:59,483 INFO L231 Difference]: Finished difference. Result has 329 places, 425 transitions, 5419 flow [2024-06-14 11:33:59,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5419, PETRI_PLACES=329, PETRI_TRANSITIONS=425} [2024-06-14 11:33:59,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-14 11:33:59,484 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 425 transitions, 5419 flow [2024-06-14 11:33:59,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:59,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:59,484 INFO 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 11:33:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:33:59,485 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 11:33:59,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash -452559100, now seen corresponding path program 1 times [2024-06-14 11:33:59,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:59,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731853137] [2024-06-14 11:33:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:59,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:59,592 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 11:33:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:59,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731853137] [2024-06-14 11:33:59,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731853137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:59,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:59,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:59,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731194354] [2024-06-14 11:33:59,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:59,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:59,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:59,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:59,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:59,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:33:59,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 425 transitions, 5419 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:59,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:59,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:33:59,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:00,436 INFO L124 PetriNetUnfolderBase]: 2945/5027 cut-off events. [2024-06-14 11:34:00,437 INFO L125 PetriNetUnfolderBase]: For 368477/368483 co-relation queries the response was YES. [2024-06-14 11:34:00,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 5027 events. 2945/5027 cut-off events. For 368477/368483 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33922 event pairs, 601 based on Foata normal form. 1/5021 useless extension candidates. Maximal degree in co-relation 32861. Up to 4244 conditions per place. [2024-06-14 11:34:00,504 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 105 changer transitions 0/470 dead transitions. [2024-06-14 11:34:00,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 470 transitions, 7093 flow [2024-06-14 11:34:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:34:00,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 11:34:00,505 INFO L175 Difference]: Start difference. First operand has 329 places, 425 transitions, 5419 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:34:00,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 470 transitions, 7093 flow [2024-06-14 11:34:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 470 transitions, 6967 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:02,156 INFO L231 Difference]: Finished difference. Result has 333 places, 437 transitions, 5659 flow [2024-06-14 11:34:02,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5659, PETRI_PLACES=333, PETRI_TRANSITIONS=437} [2024-06-14 11:34:02,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-14 11:34:02,157 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 437 transitions, 5659 flow [2024-06-14 11:34:02,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:02,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:02,157 INFO 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 11:34:02,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:34:02,158 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 11:34:02,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -452438944, now seen corresponding path program 1 times [2024-06-14 11:34:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:02,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283513107] [2024-06-14 11:34:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:02,258 INFO 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 11:34:02,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283513107] [2024-06-14 11:34:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283513107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:02,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:02,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084915421] [2024-06-14 11:34:02,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:02,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:02,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:02,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 437 transitions, 5659 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:02,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:02,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:02,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:03,248 INFO L124 PetriNetUnfolderBase]: 2971/5067 cut-off events. [2024-06-14 11:34:03,248 INFO L125 PetriNetUnfolderBase]: For 383135/383141 co-relation queries the response was YES. [2024-06-14 11:34:03,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33900 conditions, 5067 events. 2971/5067 cut-off events. For 383135/383141 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34142 event pairs, 587 based on Foata normal form. 5/5067 useless extension candidates. Maximal degree in co-relation 33739. Up to 4333 conditions per place. [2024-06-14 11:34:03,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 352 selfloop transitions, 120 changer transitions 0/479 dead transitions. [2024-06-14 11:34:03,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 479 transitions, 7364 flow [2024-06-14 11:34:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:34:03,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 11:34:03,305 INFO L175 Difference]: Start difference. First operand has 333 places, 437 transitions, 5659 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:34:03,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 479 transitions, 7364 flow [2024-06-14 11:34:05,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 479 transitions, 7229 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:05,159 INFO L231 Difference]: Finished difference. Result has 340 places, 449 transitions, 5941 flow [2024-06-14 11:34:05,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5941, PETRI_PLACES=340, PETRI_TRANSITIONS=449} [2024-06-14 11:34:05,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-14 11:34:05,159 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 449 transitions, 5941 flow [2024-06-14 11:34:05,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:05,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:05,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:05,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:34:05,160 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 11:34:05,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash -452439130, now seen corresponding path program 2 times [2024-06-14 11:34:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:05,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103146078] [2024-06-14 11:34:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:05,275 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 11:34:05,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:05,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103146078] [2024-06-14 11:34:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103146078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:05,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:05,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:05,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046114312] [2024-06-14 11:34:05,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:05,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:05,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:05,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:05,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 449 transitions, 5941 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:05,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:05,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:05,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:06,192 INFO L124 PetriNetUnfolderBase]: 2976/5076 cut-off events. [2024-06-14 11:34:06,192 INFO L125 PetriNetUnfolderBase]: For 384147/384153 co-relation queries the response was YES. [2024-06-14 11:34:06,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34198 conditions, 5076 events. 2976/5076 cut-off events. For 384147/384153 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34269 event pairs, 576 based on Foata normal form. 5/5076 useless extension candidates. Maximal degree in co-relation 34033. Up to 4471 conditions per place. [2024-06-14 11:34:06,264 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 60 changer transitions 0/479 dead transitions. [2024-06-14 11:34:06,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 479 transitions, 6973 flow [2024-06-14 11:34:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:34:06,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 11:34:06,265 INFO L175 Difference]: Start difference. First operand has 340 places, 449 transitions, 5941 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:34:06,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 479 transitions, 6973 flow [2024-06-14 11:34:08,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 479 transitions, 6687 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:08,166 INFO L231 Difference]: Finished difference. Result has 344 places, 452 transitions, 5807 flow [2024-06-14 11:34:08,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=344, PETRI_TRANSITIONS=452} [2024-06-14 11:34:08,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-14 11:34:08,167 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 452 transitions, 5807 flow [2024-06-14 11:34:08,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:08,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:08,167 INFO 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 11:34:08,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:34:08,167 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 11:34:08,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:08,168 INFO L85 PathProgramCache]: Analyzing trace with hash -275070274, now seen corresponding path program 2 times [2024-06-14 11:34:08,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:08,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399429895] [2024-06-14 11:34:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:08,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:08,279 INFO 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 11:34:08,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:08,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399429895] [2024-06-14 11:34:08,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399429895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:08,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721301476] [2024-06-14 11:34:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:08,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:08,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 452 transitions, 5807 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:08,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:08,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:08,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:09,296 INFO L124 PetriNetUnfolderBase]: 2981/5086 cut-off events. [2024-06-14 11:34:09,296 INFO L125 PetriNetUnfolderBase]: For 391907/391913 co-relation queries the response was YES. [2024-06-14 11:34:09,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34123 conditions, 5086 events. 2981/5086 cut-off events. For 391907/391913 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34378 event pairs, 596 based on Foata normal form. 5/5085 useless extension candidates. Maximal degree in co-relation 33957. Up to 4346 conditions per place. [2024-06-14 11:34:09,353 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 123 changer transitions 0/481 dead transitions. [2024-06-14 11:34:09,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 481 transitions, 7207 flow [2024-06-14 11:34:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:34:09,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 11:34:09,354 INFO L175 Difference]: Start difference. First operand has 344 places, 452 transitions, 5807 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:34:09,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 481 transitions, 7207 flow [2024-06-14 11:34:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 481 transitions, 7075 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 11:34:11,140 INFO L231 Difference]: Finished difference. Result has 345 places, 455 transitions, 5959 flow [2024-06-14 11:34:11,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5959, PETRI_PLACES=345, PETRI_TRANSITIONS=455} [2024-06-14 11:34:11,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-14 11:34:11,140 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 455 transitions, 5959 flow [2024-06-14 11:34:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:11,141 INFO 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 11:34:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:34:11,141 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 11:34:11,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1286237584, now seen corresponding path program 3 times [2024-06-14 11:34:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605053907] [2024-06-14 11:34:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:11,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605053907] [2024-06-14 11:34:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605053907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:11,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:11,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24633475] [2024-06-14 11:34:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:11,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:11,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 455 transitions, 5959 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:11,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:12,134 INFO L124 PetriNetUnfolderBase]: 2991/5101 cut-off events. [2024-06-14 11:34:12,135 INFO L125 PetriNetUnfolderBase]: For 400172/400178 co-relation queries the response was YES. [2024-06-14 11:34:12,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34486 conditions, 5101 events. 2991/5101 cut-off events. For 400172/400178 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34506 event pairs, 587 based on Foata normal form. 5/5101 useless extension candidates. Maximal degree in co-relation 34320. Up to 4356 conditions per place. [2024-06-14 11:34:12,207 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 129 changer transitions 0/493 dead transitions. [2024-06-14 11:34:12,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 493 transitions, 7627 flow [2024-06-14 11:34:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:34:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:34:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 11:34:12,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 11:34:12,209 INFO L175 Difference]: Start difference. First operand has 345 places, 455 transitions, 5959 flow. Second operand 10 states and 238 transitions. [2024-06-14 11:34:12,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 493 transitions, 7627 flow [2024-06-14 11:34:13,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 493 transitions, 7467 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:13,821 INFO L231 Difference]: Finished difference. Result has 352 places, 461 transitions, 6151 flow [2024-06-14 11:34:13,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6151, PETRI_PLACES=352, PETRI_TRANSITIONS=461} [2024-06-14 11:34:13,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-14 11:34:13,822 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 461 transitions, 6151 flow [2024-06-14 11:34:13,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:13,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:13,822 INFO 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 11:34:13,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:34:13,822 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 11:34:13,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash 14051728, now seen corresponding path program 3 times [2024-06-14 11:34:13,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:13,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003812232] [2024-06-14 11:34:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:13,926 INFO 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 11:34:13,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:13,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003812232] [2024-06-14 11:34:13,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003812232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:13,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:13,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244403155] [2024-06-14 11:34:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:13,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:13,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:13,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:13,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 461 transitions, 6151 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:13,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:13,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:13,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:14,932 INFO L124 PetriNetUnfolderBase]: 3004/5121 cut-off events. [2024-06-14 11:34:14,932 INFO L125 PetriNetUnfolderBase]: For 413672/413678 co-relation queries the response was YES. [2024-06-14 11:34:14,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34837 conditions, 5121 events. 3004/5121 cut-off events. For 413672/413678 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34609 event pairs, 576 based on Foata normal form. 5/5121 useless extension candidates. Maximal degree in co-relation 34668. Up to 4502 conditions per place. [2024-06-14 11:34:14,992 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 70 changer transitions 0/498 dead transitions. [2024-06-14 11:34:14,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 498 transitions, 7445 flow [2024-06-14 11:34:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:34:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:34:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 11:34:14,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-14 11:34:14,993 INFO L175 Difference]: Start difference. First operand has 352 places, 461 transitions, 6151 flow. Second operand 11 states and 247 transitions. [2024-06-14 11:34:14,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 498 transitions, 7445 flow [2024-06-14 11:34:16,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 498 transitions, 7095 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:34:16,560 INFO L231 Difference]: Finished difference. Result has 356 places, 467 transitions, 6021 flow [2024-06-14 11:34:16,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6021, PETRI_PLACES=356, PETRI_TRANSITIONS=467} [2024-06-14 11:34:16,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 11:34:16,561 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 467 transitions, 6021 flow [2024-06-14 11:34:16,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:16,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:16,561 INFO 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 11:34:16,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:34:16,561 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 11:34:16,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1170589538, now seen corresponding path program 4 times [2024-06-14 11:34:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:16,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980349117] [2024-06-14 11:34:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:16,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:16,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980349117] [2024-06-14 11:34:16,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980349117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:16,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:16,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:16,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780357579] [2024-06-14 11:34:16,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:16,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:16,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:16,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:16,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 467 transitions, 6021 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:16,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:16,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:16,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:17,512 INFO L124 PetriNetUnfolderBase]: 3017/5113 cut-off events. [2024-06-14 11:34:17,512 INFO L125 PetriNetUnfolderBase]: For 426302/426302 co-relation queries the response was YES. [2024-06-14 11:34:17,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34932 conditions, 5113 events. 3017/5113 cut-off events. For 426302/426302 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34447 event pairs, 621 based on Foata normal form. 1/5099 useless extension candidates. Maximal degree in co-relation 34762. Up to 4331 conditions per place. [2024-06-14 11:34:17,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 123 changer transitions 0/496 dead transitions. [2024-06-14 11:34:17,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 496 transitions, 7687 flow [2024-06-14 11:34:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:34:17,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:34:17,583 INFO L175 Difference]: Start difference. First operand has 356 places, 467 transitions, 6021 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:34:17,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 496 transitions, 7687 flow [2024-06-14 11:34:19,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 496 transitions, 7463 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-14 11:34:19,465 INFO L231 Difference]: Finished difference. Result has 352 places, 473 transitions, 6129 flow [2024-06-14 11:34:19,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6129, PETRI_PLACES=352, PETRI_TRANSITIONS=473} [2024-06-14 11:34:19,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-14 11:34:19,466 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 473 transitions, 6129 flow [2024-06-14 11:34:19,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:19,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:19,466 INFO 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 11:34:19,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:34:19,466 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 11:34:19,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:19,466 INFO L85 PathProgramCache]: Analyzing trace with hash 634300144, now seen corresponding path program 5 times [2024-06-14 11:34:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:19,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922426959] [2024-06-14 11:34:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:19,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:19,560 INFO 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 11:34:19,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:19,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922426959] [2024-06-14 11:34:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922426959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:19,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:19,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114574677] [2024-06-14 11:34:19,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:19,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:19,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 473 transitions, 6129 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:19,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:19,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:19,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:20,562 INFO L124 PetriNetUnfolderBase]: 3030/5135 cut-off events. [2024-06-14 11:34:20,563 INFO L125 PetriNetUnfolderBase]: For 438743/438743 co-relation queries the response was YES. [2024-06-14 11:34:20,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35322 conditions, 5135 events. 3030/5135 cut-off events. For 438743/438743 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34669 event pairs, 621 based on Foata normal form. 1/5121 useless extension candidates. Maximal degree in co-relation 35153. Up to 4346 conditions per place. [2024-06-14 11:34:20,626 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 364 selfloop transitions, 128 changer transitions 0/499 dead transitions. [2024-06-14 11:34:20,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 499 transitions, 7811 flow [2024-06-14 11:34:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:34:20,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 11:34:20,628 INFO L175 Difference]: Start difference. First operand has 352 places, 473 transitions, 6129 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:34:20,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 499 transitions, 7811 flow [2024-06-14 11:34:22,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 499 transitions, 7533 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:22,400 INFO L231 Difference]: Finished difference. Result has 356 places, 479 transitions, 6205 flow [2024-06-14 11:34:22,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5887, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6205, PETRI_PLACES=356, PETRI_TRANSITIONS=479} [2024-06-14 11:34:22,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 11:34:22,401 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 479 transitions, 6205 flow [2024-06-14 11:34:22,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:22,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:22,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:34:22,401 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 11:34:22,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash -985730804, now seen corresponding path program 6 times [2024-06-14 11:34:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:22,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144247778] [2024-06-14 11:34:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:22,504 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 11:34:22,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:22,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144247778] [2024-06-14 11:34:22,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144247778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:22,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:22,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:22,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344853541] [2024-06-14 11:34:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:22,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:22,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:22,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:22,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 479 transitions, 6205 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:22,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:22,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:22,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:23,649 INFO L124 PetriNetUnfolderBase]: 3027/5131 cut-off events. [2024-06-14 11:34:23,649 INFO L125 PetriNetUnfolderBase]: For 443068/443068 co-relation queries the response was YES. [2024-06-14 11:34:23,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35246 conditions, 5131 events. 3027/5131 cut-off events. For 443068/443068 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34642 event pairs, 621 based on Foata normal form. 1/5117 useless extension candidates. Maximal degree in co-relation 35076. Up to 4343 conditions per place. [2024-06-14 11:34:23,730 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 371 selfloop transitions, 125 changer transitions 0/503 dead transitions. [2024-06-14 11:34:23,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 503 transitions, 8007 flow [2024-06-14 11:34:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:34:23,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-14 11:34:23,732 INFO L175 Difference]: Start difference. First operand has 356 places, 479 transitions, 6205 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:34:23,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 503 transitions, 8007 flow [2024-06-14 11:34:25,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 503 transitions, 7799 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:25,818 INFO L231 Difference]: Finished difference. Result has 360 places, 479 transitions, 6253 flow [2024-06-14 11:34:25,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6253, PETRI_PLACES=360, PETRI_TRANSITIONS=479} [2024-06-14 11:34:25,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-14 11:34:25,819 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 479 transitions, 6253 flow [2024-06-14 11:34:25,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:25,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:25,819 INFO 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 11:34:25,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:34:25,819 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 11:34:25,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash -985610834, now seen corresponding path program 7 times [2024-06-14 11:34:25,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:25,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076713314] [2024-06-14 11:34:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:25,922 INFO 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 11:34:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:25,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076713314] [2024-06-14 11:34:25,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076713314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:25,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:25,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:25,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715117877] [2024-06-14 11:34:25,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:25,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:25,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:25,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:25,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:25,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 479 transitions, 6253 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:25,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:25,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:25,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:26,922 INFO L124 PetriNetUnfolderBase]: 3037/5157 cut-off events. [2024-06-14 11:34:26,923 INFO L125 PetriNetUnfolderBase]: For 452075/452075 co-relation queries the response was YES. [2024-06-14 11:34:26,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 5157 events. 3037/5157 cut-off events. For 452075/452075 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34890 event pairs, 591 based on Foata normal form. 1/5146 useless extension candidates. Maximal degree in co-relation 35306. Up to 4554 conditions per place. [2024-06-14 11:34:26,987 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 66 changer transitions 0/502 dead transitions. [2024-06-14 11:34:26,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 502 transitions, 7373 flow [2024-06-14 11:34:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:34:26,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 11:34:26,988 INFO L175 Difference]: Start difference. First operand has 360 places, 479 transitions, 6253 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:34:26,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 502 transitions, 7373 flow [2024-06-14 11:34:29,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 502 transitions, 6975 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:34:29,307 INFO L231 Difference]: Finished difference. Result has 360 places, 485 transitions, 6087 flow [2024-06-14 11:34:29,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6087, PETRI_PLACES=360, PETRI_TRANSITIONS=485} [2024-06-14 11:34:29,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-14 11:34:29,308 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 485 transitions, 6087 flow [2024-06-14 11:34:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:29,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:29,308 INFO 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 11:34:29,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:34:29,308 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 11:34:29,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash -985610648, now seen corresponding path program 4 times [2024-06-14 11:34:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568633425] [2024-06-14 11:34:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568633425] [2024-06-14 11:34:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568633425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:29,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20612234] [2024-06-14 11:34:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:29,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:29,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:29,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 485 transitions, 6087 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:29,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:29,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:29,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:30,306 INFO L124 PetriNetUnfolderBase]: 3042/5164 cut-off events. [2024-06-14 11:34:30,306 INFO L125 PetriNetUnfolderBase]: For 459031/459031 co-relation queries the response was YES. [2024-06-14 11:34:30,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35358 conditions, 5164 events. 3042/5164 cut-off events. For 459031/459031 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34887 event pairs, 613 based on Foata normal form. 1/5153 useless extension candidates. Maximal degree in co-relation 35187. Up to 4423 conditions per place. [2024-06-14 11:34:30,380 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 133 changer transitions 0/508 dead transitions. [2024-06-14 11:34:30,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 508 transitions, 7753 flow [2024-06-14 11:34:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:34:30,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-14 11:34:30,381 INFO L175 Difference]: Start difference. First operand has 360 places, 485 transitions, 6087 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:34:30,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 508 transitions, 7753 flow [2024-06-14 11:34:32,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 508 transitions, 7615 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:32,648 INFO L231 Difference]: Finished difference. Result has 363 places, 488 transitions, 6261 flow [2024-06-14 11:34:32,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6261, PETRI_PLACES=363, PETRI_TRANSITIONS=488} [2024-06-14 11:34:32,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-14 11:34:32,649 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 488 transitions, 6261 flow [2024-06-14 11:34:32,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:32,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:32,649 INFO 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 11:34:32,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:34:32,649 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 11:34:32,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:32,649 INFO L85 PathProgramCache]: Analyzing trace with hash -660662324, now seen corresponding path program 8 times [2024-06-14 11:34:32,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:32,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736507384] [2024-06-14 11:34:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:32,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:32,745 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 11:34:32,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:32,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736507384] [2024-06-14 11:34:32,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736507384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:32,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:32,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73545351] [2024-06-14 11:34:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:32,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:32,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:32,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:32,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 488 transitions, 6261 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:32,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:32,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:32,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:33,694 INFO L124 PetriNetUnfolderBase]: 3060/5197 cut-off events. [2024-06-14 11:34:33,695 INFO L125 PetriNetUnfolderBase]: For 472930/472930 co-relation queries the response was YES. [2024-06-14 11:34:33,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35870 conditions, 5197 events. 3060/5197 cut-off events. For 472930/472930 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35225 event pairs, 591 based on Foata normal form. 1/5186 useless extension candidates. Maximal degree in co-relation 35698. Up to 4569 conditions per place. [2024-06-14 11:34:33,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 80 changer transitions 0/512 dead transitions. [2024-06-14 11:34:33,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 512 transitions, 7595 flow [2024-06-14 11:34:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:34:33,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-14 11:34:33,761 INFO L175 Difference]: Start difference. First operand has 363 places, 488 transitions, 6261 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:34:33,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 512 transitions, 7595 flow [2024-06-14 11:34:36,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 512 transitions, 7259 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:36,042 INFO L231 Difference]: Finished difference. Result has 366 places, 497 transitions, 6214 flow [2024-06-14 11:34:36,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6214, PETRI_PLACES=366, PETRI_TRANSITIONS=497} [2024-06-14 11:34:36,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-14 11:34:36,043 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 497 transitions, 6214 flow [2024-06-14 11:34:36,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:36,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:36,043 INFO 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 11:34:36,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:34:36,044 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 11:34:36,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash -660483578, now seen corresponding path program 5 times [2024-06-14 11:34:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193905973] [2024-06-14 11:34:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:36,134 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 11:34:36,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:36,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193905973] [2024-06-14 11:34:36,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193905973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:36,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:36,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:36,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122437678] [2024-06-14 11:34:36,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:36,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:36,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:36,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:36,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 497 transitions, 6214 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:36,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:36,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:36,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:37,079 INFO L124 PetriNetUnfolderBase]: 3073/5217 cut-off events. [2024-06-14 11:34:37,080 INFO L125 PetriNetUnfolderBase]: For 485995/485995 co-relation queries the response was YES. [2024-06-14 11:34:37,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36030 conditions, 5217 events. 3073/5217 cut-off events. For 485995/485995 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35362 event pairs, 613 based on Foata normal form. 1/5206 useless extension candidates. Maximal degree in co-relation 35857. Up to 4460 conditions per place. [2024-06-14 11:34:37,178 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 138 changer transitions 0/520 dead transitions. [2024-06-14 11:34:37,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 520 transitions, 7932 flow [2024-06-14 11:34:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 11:34:37,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:34:37,179 INFO L175 Difference]: Start difference. First operand has 366 places, 497 transitions, 6214 flow. Second operand 7 states and 168 transitions. [2024-06-14 11:34:37,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 520 transitions, 7932 flow [2024-06-14 11:34:39,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 520 transitions, 7824 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:39,703 INFO L231 Difference]: Finished difference. Result has 371 places, 503 transitions, 6452 flow [2024-06-14 11:34:39,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6452, PETRI_PLACES=371, PETRI_TRANSITIONS=503} [2024-06-14 11:34:39,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-14 11:34:39,703 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 503 transitions, 6452 flow [2024-06-14 11:34:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:39,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:39,704 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 11:34:39,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:34:39,704 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 11:34:39,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash -660869714, now seen corresponding path program 9 times [2024-06-14 11:34:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:39,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909344736] [2024-06-14 11:34:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:39,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:39,807 INFO 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 11:34:39,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:39,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909344736] [2024-06-14 11:34:39,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909344736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:39,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:39,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:39,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928327536] [2024-06-14 11:34:39,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:39,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:39,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 503 transitions, 6452 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:39,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:39,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:39,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:40,789 INFO L124 PetriNetUnfolderBase]: 3070/5215 cut-off events. [2024-06-14 11:34:40,789 INFO L125 PetriNetUnfolderBase]: For 490880/490880 co-relation queries the response was YES. [2024-06-14 11:34:40,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36200 conditions, 5215 events. 3070/5215 cut-off events. For 490880/490880 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35334 event pairs, 591 based on Foata normal form. 1/5204 useless extension candidates. Maximal degree in co-relation 36026. Up to 4584 conditions per place. [2024-06-14 11:34:40,865 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 81 changer transitions 0/519 dead transitions. [2024-06-14 11:34:40,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 519 transitions, 7514 flow [2024-06-14 11:34:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:34:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:34:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 11:34:40,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 11:34:40,866 INFO L175 Difference]: Start difference. First operand has 371 places, 503 transitions, 6452 flow. Second operand 9 states and 199 transitions. [2024-06-14 11:34:40,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 519 transitions, 7514 flow [2024-06-14 11:34:43,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 519 transitions, 7286 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:43,412 INFO L231 Difference]: Finished difference. Result has 377 places, 503 transitions, 6392 flow [2024-06-14 11:34:43,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6392, PETRI_PLACES=377, PETRI_TRANSITIONS=503} [2024-06-14 11:34:43,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-14 11:34:43,414 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 503 transitions, 6392 flow [2024-06-14 11:34:43,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:43,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:43,415 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, 1] [2024-06-14 11:34:43,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:34:43,417 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 11:34:43,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 433897420, now seen corresponding path program 6 times [2024-06-14 11:34:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:43,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084361638] [2024-06-14 11:34:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:43,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:43,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:43,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084361638] [2024-06-14 11:34:43,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084361638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:43,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:43,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:43,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514666267] [2024-06-14 11:34:43,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:43,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:43,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:43,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:43,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:43,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:43,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 503 transitions, 6392 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:43,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:43,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:43,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:44,430 INFO L124 PetriNetUnfolderBase]: 3067/5209 cut-off events. [2024-06-14 11:34:44,430 INFO L125 PetriNetUnfolderBase]: For 495016/495016 co-relation queries the response was YES. [2024-06-14 11:34:44,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36039 conditions, 5209 events. 3067/5209 cut-off events. For 495016/495016 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35285 event pairs, 613 based on Foata normal form. 1/5198 useless extension candidates. Maximal degree in co-relation 35864. Up to 4453 conditions per place. [2024-06-14 11:34:44,507 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 136 changer transitions 0/519 dead transitions. [2024-06-14 11:34:44,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 519 transitions, 7854 flow [2024-06-14 11:34:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:34:44,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 11:34:44,509 INFO L175 Difference]: Start difference. First operand has 377 places, 503 transitions, 6392 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:34:44,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 519 transitions, 7854 flow [2024-06-14 11:34:46,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 519 transitions, 7656 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:34:46,590 INFO L231 Difference]: Finished difference. Result has 376 places, 503 transitions, 6472 flow [2024-06-14 11:34:46,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6472, PETRI_PLACES=376, PETRI_TRANSITIONS=503} [2024-06-14 11:34:46,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-14 11:34:46,590 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 503 transitions, 6472 flow [2024-06-14 11:34:46,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:46,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:46,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:46,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:34:46,591 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 11:34:46,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash -61539774, now seen corresponding path program 7 times [2024-06-14 11:34:46,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:46,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747033603] [2024-06-14 11:34:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:46,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:46,697 INFO 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 11:34:46,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:46,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747033603] [2024-06-14 11:34:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747033603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:46,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715432561] [2024-06-14 11:34:46,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:46,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:46,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:46,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 503 transitions, 6472 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:46,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:46,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:46,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:47,667 INFO L124 PetriNetUnfolderBase]: 3080/5254 cut-off events. [2024-06-14 11:34:47,668 INFO L125 PetriNetUnfolderBase]: For 510222/510228 co-relation queries the response was YES. [2024-06-14 11:34:47,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36504 conditions, 5254 events. 3080/5254 cut-off events. For 510222/510228 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35787 event pairs, 602 based on Foata normal form. 5/5253 useless extension candidates. Maximal degree in co-relation 36328. Up to 4468 conditions per place. [2024-06-14 11:34:47,744 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 142 changer transitions 0/530 dead transitions. [2024-06-14 11:34:47,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 530 transitions, 8256 flow [2024-06-14 11:34:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 11:34:47,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 11:34:47,746 INFO L175 Difference]: Start difference. First operand has 376 places, 503 transitions, 6472 flow. Second operand 8 states and 190 transitions. [2024-06-14 11:34:47,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 530 transitions, 8256 flow [2024-06-14 11:34:50,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 530 transitions, 7959 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:50,011 INFO L231 Difference]: Finished difference. Result has 378 places, 509 transitions, 6547 flow [2024-06-14 11:34:50,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6547, PETRI_PLACES=378, PETRI_TRANSITIONS=509} [2024-06-14 11:34:50,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 11:34:50,012 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 509 transitions, 6547 flow [2024-06-14 11:34:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:50,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:50,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:50,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:34:50,012 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 11:34:50,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash 662415146, now seen corresponding path program 10 times [2024-06-14 11:34:50,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:50,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742972215] [2024-06-14 11:34:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:50,110 INFO 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 11:34:50,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742972215] [2024-06-14 11:34:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742972215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:50,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:50,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:50,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301234898] [2024-06-14 11:34:50,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:50,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:50,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:50,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:50,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 509 transitions, 6547 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:50,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:50,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:50,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:51,091 INFO L124 PetriNetUnfolderBase]: 3085/5242 cut-off events. [2024-06-14 11:34:51,092 INFO L125 PetriNetUnfolderBase]: For 519383/519383 co-relation queries the response was YES. [2024-06-14 11:34:51,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36633 conditions, 5242 events. 3085/5242 cut-off events. For 519383/519383 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35632 event pairs, 591 based on Foata normal form. 1/5231 useless extension candidates. Maximal degree in co-relation 36456. Up to 4455 conditions per place. [2024-06-14 11:34:51,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 138 changer transitions 0/537 dead transitions. [2024-06-14 11:34:51,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 8111 flow [2024-06-14 11:34:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:34:51,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 11:34:51,173 INFO L175 Difference]: Start difference. First operand has 378 places, 509 transitions, 6547 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:34:51,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 8111 flow [2024-06-14 11:34:53,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 537 transitions, 7884 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:53,741 INFO L231 Difference]: Finished difference. Result has 382 places, 512 transitions, 6691 flow [2024-06-14 11:34:53,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6691, PETRI_PLACES=382, PETRI_TRANSITIONS=512} [2024-06-14 11:34:53,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-14 11:34:53,741 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 512 transitions, 6691 flow [2024-06-14 11:34:53,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:53,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:53,742 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, 1] [2024-06-14 11:34:53,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:34:53,742 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 11:34:53,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash -66301374, now seen corresponding path program 8 times [2024-06-14 11:34:53,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:53,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901564736] [2024-06-14 11:34:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:53,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:53,860 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 11:34:53,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:53,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901564736] [2024-06-14 11:34:53,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901564736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:53,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:53,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:53,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189497889] [2024-06-14 11:34:53,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:53,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:53,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:53,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:53,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:53,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 512 transitions, 6691 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:53,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:53,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:53,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:54,821 INFO L124 PetriNetUnfolderBase]: 3090/5270 cut-off events. [2024-06-14 11:34:54,821 INFO L125 PetriNetUnfolderBase]: For 530405/530411 co-relation queries the response was YES. [2024-06-14 11:34:54,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36902 conditions, 5270 events. 3090/5270 cut-off events. For 530405/530411 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35894 event pairs, 606 based on Foata normal form. 5/5269 useless extension candidates. Maximal degree in co-relation 36722. Up to 4481 conditions per place. [2024-06-14 11:34:54,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 383 selfloop transitions, 145 changer transitions 0/535 dead transitions. [2024-06-14 11:34:54,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 535 transitions, 8231 flow [2024-06-14 11:34:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 11:34:54,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:34:54,907 INFO L175 Difference]: Start difference. First operand has 382 places, 512 transitions, 6691 flow. Second operand 8 states and 189 transitions. [2024-06-14 11:34:54,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 535 transitions, 8231 flow [2024-06-14 11:34:57,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 535 transitions, 7911 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:34:57,646 INFO L231 Difference]: Finished difference. Result has 383 places, 515 transitions, 6699 flow [2024-06-14 11:34:57,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6699, PETRI_PLACES=383, PETRI_TRANSITIONS=515} [2024-06-14 11:34:57,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-14 11:34:57,647 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 515 transitions, 6699 flow [2024-06-14 11:34:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:34:57,647 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 11:34:57,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2067592896, now seen corresponding path program 11 times [2024-06-14 11:34:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659225564] [2024-06-14 11:34:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:57,761 INFO 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 11:34:57,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:57,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659225564] [2024-06-14 11:34:57,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659225564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:57,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:57,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:57,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257812289] [2024-06-14 11:34:57,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:57,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:57,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:57,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:57,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:57,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:34:57,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 515 transitions, 6699 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:57,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:57,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:34:57,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:58,792 INFO L124 PetriNetUnfolderBase]: 3087/5245 cut-off events. [2024-06-14 11:34:58,792 INFO L125 PetriNetUnfolderBase]: For 515248/515248 co-relation queries the response was YES. [2024-06-14 11:34:58,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36632 conditions, 5245 events. 3087/5245 cut-off events. For 515248/515248 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35651 event pairs, 591 based on Foata normal form. 1/5234 useless extension candidates. Maximal degree in co-relation 36452. Up to 4459 conditions per place. [2024-06-14 11:34:58,871 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 399 selfloop transitions, 142 changer transitions 0/548 dead transitions. [2024-06-14 11:34:58,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 548 transitions, 8271 flow [2024-06-14 11:34:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:34:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:34:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 11:34:58,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-14 11:34:58,872 INFO L175 Difference]: Start difference. First operand has 383 places, 515 transitions, 6699 flow. Second operand 9 states and 220 transitions. [2024-06-14 11:34:58,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 548 transitions, 8271 flow [2024-06-14 11:35:01,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 548 transitions, 8067 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:01,273 INFO L231 Difference]: Finished difference. Result has 387 places, 515 transitions, 6797 flow [2024-06-14 11:35:01,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6797, PETRI_PLACES=387, PETRI_TRANSITIONS=515} [2024-06-14 11:35:01,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-14 11:35:01,273 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 515 transitions, 6797 flow [2024-06-14 11:35:01,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:01,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:01,273 INFO 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 11:35:01,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:35:01,274 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 11:35:01,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:01,274 INFO L85 PathProgramCache]: Analyzing trace with hash -289826874, now seen corresponding path program 9 times [2024-06-14 11:35:01,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:01,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726999358] [2024-06-14 11:35:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:01,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:01,370 INFO 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 11:35:01,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:01,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726999358] [2024-06-14 11:35:01,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726999358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:01,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469368876] [2024-06-14 11:35:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:01,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:01,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 515 transitions, 6797 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:01,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:01,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:01,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:02,331 INFO L124 PetriNetUnfolderBase]: 3092/5252 cut-off events. [2024-06-14 11:35:02,331 INFO L125 PetriNetUnfolderBase]: For 525510/525510 co-relation queries the response was YES. [2024-06-14 11:35:02,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36834 conditions, 5252 events. 3092/5252 cut-off events. For 525510/525510 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35684 event pairs, 613 based on Foata normal form. 1/5241 useless extension candidates. Maximal degree in co-relation 36652. Up to 4483 conditions per place. [2024-06-14 11:35:02,414 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 376 selfloop transitions, 154 changer transitions 0/537 dead transitions. [2024-06-14 11:35:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 537 transitions, 8562 flow [2024-06-14 11:35:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 11:35:02,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-14 11:35:02,415 INFO L175 Difference]: Start difference. First operand has 387 places, 515 transitions, 6797 flow. Second operand 6 states and 151 transitions. [2024-06-14 11:35:02,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 537 transitions, 8562 flow [2024-06-14 11:35:05,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 537 transitions, 8246 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 11:35:05,285 INFO L231 Difference]: Finished difference. Result has 383 places, 518 transitions, 6862 flow [2024-06-14 11:35:05,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6499, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6862, PETRI_PLACES=383, PETRI_TRANSITIONS=518} [2024-06-14 11:35:05,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-14 11:35:05,285 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 518 transitions, 6862 flow [2024-06-14 11:35:05,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:05,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:05,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:05,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 11:35:05,286 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 11:35:05,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2012541798, now seen corresponding path program 10 times [2024-06-14 11:35:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:05,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527766015] [2024-06-14 11:35:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:05,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:05,385 INFO 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 11:35:05,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:05,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527766015] [2024-06-14 11:35:05,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527766015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:05,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:05,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:05,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141437804] [2024-06-14 11:35:05,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:05,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:05,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:05,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 518 transitions, 6862 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 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: 14 of 42 [2024-06-14 11:35:05,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:06,509 INFO L124 PetriNetUnfolderBase]: 3105/5272 cut-off events. [2024-06-14 11:35:06,509 INFO L125 PetriNetUnfolderBase]: For 512328/512328 co-relation queries the response was YES. [2024-06-14 11:35:06,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36865 conditions, 5272 events. 3105/5272 cut-off events. For 512328/512328 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35864 event pairs, 613 based on Foata normal form. 1/5261 useless extension candidates. Maximal degree in co-relation 36684. Up to 4498 conditions per place. [2024-06-14 11:35:06,579 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 374 selfloop transitions, 159 changer transitions 0/540 dead transitions. [2024-06-14 11:35:06,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 540 transitions, 8666 flow [2024-06-14 11:35:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:35:06,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 11:35:06,580 INFO L175 Difference]: Start difference. First operand has 383 places, 518 transitions, 6862 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:35:06,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 540 transitions, 8666 flow [2024-06-14 11:35:09,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 540 transitions, 8339 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:09,039 INFO L231 Difference]: Finished difference. Result has 383 places, 524 transitions, 6969 flow [2024-06-14 11:35:09,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6969, PETRI_PLACES=383, PETRI_TRANSITIONS=524} [2024-06-14 11:35:09,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-14 11:35:09,040 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 524 transitions, 6969 flow [2024-06-14 11:35:09,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:09,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:09,040 INFO 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 11:35:09,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 11:35:09,040 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 11:35:09,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2018434278, now seen corresponding path program 11 times [2024-06-14 11:35:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:09,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744194578] [2024-06-14 11:35:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:09,153 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 11:35:09,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744194578] [2024-06-14 11:35:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744194578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:09,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:09,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:09,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982570414] [2024-06-14 11:35:09,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:09,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:09,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:09,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 524 transitions, 6969 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:09,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:09,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:09,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:10,174 INFO L124 PetriNetUnfolderBase]: 3115/5311 cut-off events. [2024-06-14 11:35:10,175 INFO L125 PetriNetUnfolderBase]: For 504070/504076 co-relation queries the response was YES. [2024-06-14 11:35:10,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36894 conditions, 5311 events. 3115/5311 cut-off events. For 504070/504076 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36279 event pairs, 608 based on Foata normal form. 5/5310 useless extension candidates. Maximal degree in co-relation 36715. Up to 4508 conditions per place. [2024-06-14 11:35:10,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 386 selfloop transitions, 158 changer transitions 0/551 dead transitions. [2024-06-14 11:35:10,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 551 transitions, 8805 flow [2024-06-14 11:35:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:35:10,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 11:35:10,282 INFO L175 Difference]: Start difference. First operand has 383 places, 524 transitions, 6969 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:35:10,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 551 transitions, 8805 flow [2024-06-14 11:35:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 551 transitions, 8547 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 11:35:12,560 INFO L231 Difference]: Finished difference. Result has 389 places, 530 transitions, 7151 flow [2024-06-14 11:35:12,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7151, PETRI_PLACES=389, PETRI_TRANSITIONS=530} [2024-06-14 11:35:12,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-14 11:35:12,561 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 530 transitions, 7151 flow [2024-06-14 11:35:12,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:12,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:12,561 INFO 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 11:35:12,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 11:35:12,561 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 11:35:12,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash 28502364, now seen corresponding path program 12 times [2024-06-14 11:35:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838585941] [2024-06-14 11:35:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:12,678 INFO 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 11:35:12,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838585941] [2024-06-14 11:35:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838585941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:12,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:12,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:12,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694076934] [2024-06-14 11:35:12,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:12,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:12,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 530 transitions, 7151 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:12,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:12,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:12,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:13,752 INFO L124 PetriNetUnfolderBase]: 3112/5307 cut-off events. [2024-06-14 11:35:13,752 INFO L125 PetriNetUnfolderBase]: For 500499/500505 co-relation queries the response was YES. [2024-06-14 11:35:13,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36811 conditions, 5307 events. 3112/5307 cut-off events. For 500499/500505 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36209 event pairs, 611 based on Foata normal form. 5/5306 useless extension candidates. Maximal degree in co-relation 36631. Up to 4505 conditions per place. [2024-06-14 11:35:13,829 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 385 selfloop transitions, 158 changer transitions 0/550 dead transitions. [2024-06-14 11:35:13,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 550 transitions, 8685 flow [2024-06-14 11:35:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 11:35:13,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 11:35:13,830 INFO L175 Difference]: Start difference. First operand has 389 places, 530 transitions, 7151 flow. Second operand 8 states and 190 transitions. [2024-06-14 11:35:13,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 550 transitions, 8685 flow [2024-06-14 11:35:16,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 550 transitions, 8465 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:35:16,551 INFO L231 Difference]: Finished difference. Result has 393 places, 530 transitions, 7253 flow [2024-06-14 11:35:16,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7253, PETRI_PLACES=393, PETRI_TRANSITIONS=530} [2024-06-14 11:35:16,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-14 11:35:16,552 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 530 transitions, 7253 flow [2024-06-14 11:35:16,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:16,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:16,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:16,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 11:35:16,553 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 11:35:16,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1890764168, now seen corresponding path program 12 times [2024-06-14 11:35:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:16,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507067649] [2024-06-14 11:35:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:16,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:16,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:16,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507067649] [2024-06-14 11:35:16,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507067649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:16,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:16,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54090298] [2024-06-14 11:35:16,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:16,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:16,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:16,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:16,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:16,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 530 transitions, 7253 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:16,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:16,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:16,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:17,757 INFO L124 PetriNetUnfolderBase]: 3125/5329 cut-off events. [2024-06-14 11:35:17,758 INFO L125 PetriNetUnfolderBase]: For 516257/516263 co-relation queries the response was YES. [2024-06-14 11:35:17,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37142 conditions, 5329 events. 3125/5329 cut-off events. For 516257/516263 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36393 event pairs, 585 based on Foata normal form. 5/5328 useless extension candidates. Maximal degree in co-relation 36960. Up to 4662 conditions per place. [2024-06-14 11:35:17,837 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 472 selfloop transitions, 79 changer transitions 0/558 dead transitions. [2024-06-14 11:35:17,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 558 transitions, 8875 flow [2024-06-14 11:35:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:35:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:35:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 11:35:17,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 11:35:17,838 INFO L175 Difference]: Start difference. First operand has 393 places, 530 transitions, 7253 flow. Second operand 10 states and 222 transitions. [2024-06-14 11:35:17,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 558 transitions, 8875 flow [2024-06-14 11:35:20,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 8441 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:35:20,583 INFO L231 Difference]: Finished difference. Result has 396 places, 536 transitions, 7064 flow [2024-06-14 11:35:20,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6819, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7064, PETRI_PLACES=396, PETRI_TRANSITIONS=536} [2024-06-14 11:35:20,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-14 11:35:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 536 transitions, 7064 flow [2024-06-14 11:35:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:20,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:20,585 INFO 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 11:35:20,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 11:35:20,585 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 11:35:20,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash -251737622, now seen corresponding path program 1 times [2024-06-14 11:35:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:20,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745894805] [2024-06-14 11:35:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:20,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745894805] [2024-06-14 11:35:20,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745894805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:20,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:20,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:20,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020229369] [2024-06-14 11:35:20,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:20,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:20,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:20,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:20,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 536 transitions, 7064 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:20,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:20,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:20,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:21,804 INFO L124 PetriNetUnfolderBase]: 3260/5554 cut-off events. [2024-06-14 11:35:21,804 INFO L125 PetriNetUnfolderBase]: For 656258/656264 co-relation queries the response was YES. [2024-06-14 11:35:21,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39726 conditions, 5554 events. 3260/5554 cut-off events. For 656258/656264 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38099 event pairs, 553 based on Foata normal form. 16/5564 useless extension candidates. Maximal degree in co-relation 39543. Up to 4446 conditions per place. [2024-06-14 11:35:21,893 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 174 changer transitions 0/581 dead transitions. [2024-06-14 11:35:21,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 581 transitions, 9050 flow [2024-06-14 11:35:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 11:35:21,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 11:35:21,894 INFO L175 Difference]: Start difference. First operand has 396 places, 536 transitions, 7064 flow. Second operand 8 states and 204 transitions. [2024-06-14 11:35:21,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 581 transitions, 9050 flow [2024-06-14 11:35:24,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 581 transitions, 8890 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 11:35:25,003 INFO L231 Difference]: Finished difference. Result has 398 places, 543 transitions, 7379 flow [2024-06-14 11:35:25,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7379, PETRI_PLACES=398, PETRI_TRANSITIONS=543} [2024-06-14 11:35:25,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-14 11:35:25,003 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 543 transitions, 7379 flow [2024-06-14 11:35:25,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:25,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:25,004 INFO 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 11:35:25,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 11:35:25,004 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 11:35:25,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 13959658, now seen corresponding path program 2 times [2024-06-14 11:35:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:25,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201725547] [2024-06-14 11:35:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:25,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:25,119 INFO 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 11:35:25,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:25,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201725547] [2024-06-14 11:35:25,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201725547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:25,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:25,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:25,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490418142] [2024-06-14 11:35:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:25,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:25,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:25,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 543 transitions, 7379 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:25,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:25,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:25,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:26,311 INFO L124 PetriNetUnfolderBase]: 3408/5782 cut-off events. [2024-06-14 11:35:26,311 INFO L125 PetriNetUnfolderBase]: For 761269/761275 co-relation queries the response was YES. [2024-06-14 11:35:26,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43338 conditions, 5782 events. 3408/5782 cut-off events. For 761269/761275 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39673 event pairs, 671 based on Foata normal form. 16/5792 useless extension candidates. Maximal degree in co-relation 43154. Up to 4800 conditions per place. [2024-06-14 11:35:26,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 170 changer transitions 0/584 dead transitions. [2024-06-14 11:35:26,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 584 transitions, 9381 flow [2024-06-14 11:35:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:35:26,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 11:35:26,405 INFO L175 Difference]: Start difference. First operand has 398 places, 543 transitions, 7379 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:35:26,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 584 transitions, 9381 flow [2024-06-14 11:35:30,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 584 transitions, 9135 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 11:35:30,875 INFO L231 Difference]: Finished difference. Result has 404 places, 550 transitions, 7622 flow [2024-06-14 11:35:30,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7622, PETRI_PLACES=404, PETRI_TRANSITIONS=550} [2024-06-14 11:35:30,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 11:35:30,876 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 550 transitions, 7622 flow [2024-06-14 11:35:30,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:30,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:30,876 INFO 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 11:35:30,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 11:35:30,876 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 11:35:30,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash 14286088, now seen corresponding path program 3 times [2024-06-14 11:35:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:30,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276174746] [2024-06-14 11:35:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:30,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:31,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276174746] [2024-06-14 11:35:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276174746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:31,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:31,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:31,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749327027] [2024-06-14 11:35:31,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:31,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:31,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:31,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:31,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:31,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 550 transitions, 7622 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:31,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:31,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:31,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:32,212 INFO L124 PetriNetUnfolderBase]: 3372/5730 cut-off events. [2024-06-14 11:35:32,212 INFO L125 PetriNetUnfolderBase]: For 708998/709004 co-relation queries the response was YES. [2024-06-14 11:35:32,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41740 conditions, 5730 events. 3372/5730 cut-off events. For 708998/709004 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39370 event pairs, 667 based on Foata normal form. 20/5744 useless extension candidates. Maximal degree in co-relation 41553. Up to 4844 conditions per place. [2024-06-14 11:35:32,300 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 166 changer transitions 0/580 dead transitions. [2024-06-14 11:35:32,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 580 transitions, 9272 flow [2024-06-14 11:35:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:35:32,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-14 11:35:32,301 INFO L175 Difference]: Start difference. First operand has 404 places, 550 transitions, 7622 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:35:32,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 580 transitions, 9272 flow [2024-06-14 11:35:35,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 580 transitions, 9020 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 11:35:35,338 INFO L231 Difference]: Finished difference. Result has 408 places, 550 transitions, 7708 flow [2024-06-14 11:35:35,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7708, PETRI_PLACES=408, PETRI_TRANSITIONS=550} [2024-06-14 11:35:35,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-14 11:35:35,339 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 550 transitions, 7708 flow [2024-06-14 11:35:35,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:35,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:35,340 INFO 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 11:35:35,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 11:35:35,340 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 11:35:35,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1071212250, now seen corresponding path program 4 times [2024-06-14 11:35:35,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:35,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764724360] [2024-06-14 11:35:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:35,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:35,458 INFO 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 11:35:35,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:35,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764724360] [2024-06-14 11:35:35,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764724360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:35,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:35,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:35,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774981944] [2024-06-14 11:35:35,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:35,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:35,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:35,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 550 transitions, 7708 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:35,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:35,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:35,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:36,652 INFO L124 PetriNetUnfolderBase]: 3428/5818 cut-off events. [2024-06-14 11:35:36,652 INFO L125 PetriNetUnfolderBase]: For 721631/721637 co-relation queries the response was YES. [2024-06-14 11:35:36,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42541 conditions, 5818 events. 3428/5818 cut-off events. For 721631/721637 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40039 event pairs, 675 based on Foata normal form. 20/5832 useless extension candidates. Maximal degree in co-relation 42352. Up to 4932 conditions per place. [2024-06-14 11:35:36,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 161 changer transitions 0/576 dead transitions. [2024-06-14 11:35:36,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 576 transitions, 9388 flow [2024-06-14 11:35:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:35:36,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:35:36,744 INFO L175 Difference]: Start difference. First operand has 408 places, 550 transitions, 7708 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:35:36,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 576 transitions, 9388 flow [2024-06-14 11:35:40,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 576 transitions, 9054 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:40,697 INFO L231 Difference]: Finished difference. Result has 410 places, 552 transitions, 7756 flow [2024-06-14 11:35:40,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7756, PETRI_PLACES=410, PETRI_TRANSITIONS=552} [2024-06-14 11:35:40,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 11:35:40,698 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 552 transitions, 7756 flow [2024-06-14 11:35:40,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:40,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:40,699 INFO 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 11:35:40,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 11:35:40,699 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 11:35:40,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1442110200, now seen corresponding path program 5 times [2024-06-14 11:35:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:40,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986254384] [2024-06-14 11:35:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:40,840 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 11:35:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986254384] [2024-06-14 11:35:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986254384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:40,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:40,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:40,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836080409] [2024-06-14 11:35:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:40,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:40,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 552 transitions, 7756 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:40,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:40,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:40,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:42,048 INFO L124 PetriNetUnfolderBase]: 3484/5914 cut-off events. [2024-06-14 11:35:42,048 INFO L125 PetriNetUnfolderBase]: For 736046/736052 co-relation queries the response was YES. [2024-06-14 11:35:42,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43313 conditions, 5914 events. 3484/5914 cut-off events. For 736046/736052 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40774 event pairs, 687 based on Foata normal form. 20/5928 useless extension candidates. Maximal degree in co-relation 43123. Up to 5020 conditions per place. [2024-06-14 11:35:42,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 411 selfloop transitions, 160 changer transitions 0/578 dead transitions. [2024-06-14 11:35:42,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 578 transitions, 9448 flow [2024-06-14 11:35:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 11:35:42,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 11:35:42,142 INFO L175 Difference]: Start difference. First operand has 410 places, 552 transitions, 7756 flow. Second operand 8 states and 193 transitions. [2024-06-14 11:35:42,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 578 transitions, 9448 flow [2024-06-14 11:35:46,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 578 transitions, 9100 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:46,053 INFO L231 Difference]: Finished difference. Result has 412 places, 554 transitions, 7792 flow [2024-06-14 11:35:46,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7792, PETRI_PLACES=412, PETRI_TRANSITIONS=554} [2024-06-14 11:35:46,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-14 11:35:46,054 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 554 transitions, 7792 flow [2024-06-14 11:35:46,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:46,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:46,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:46,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 11:35:46,054 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 11:35:46,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1442436630, now seen corresponding path program 6 times [2024-06-14 11:35:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:46,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830103105] [2024-06-14 11:35:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:46,164 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 11:35:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830103105] [2024-06-14 11:35:46,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830103105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:46,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:46,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850576371] [2024-06-14 11:35:46,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:46,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:46,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:46,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:46,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:46,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:46,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 554 transitions, 7792 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:46,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:46,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:46,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:47,421 INFO L124 PetriNetUnfolderBase]: 3540/6002 cut-off events. [2024-06-14 11:35:47,421 INFO L125 PetriNetUnfolderBase]: For 727312/727318 co-relation queries the response was YES. [2024-06-14 11:35:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43868 conditions, 6002 events. 3540/6002 cut-off events. For 727312/727318 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41455 event pairs, 683 based on Foata normal form. 16/6012 useless extension candidates. Maximal degree in co-relation 43677. Up to 4984 conditions per place. [2024-06-14 11:35:47,518 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 166 changer transitions 0/586 dead transitions. [2024-06-14 11:35:47,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 586 transitions, 9554 flow [2024-06-14 11:35:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 11:35:47,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 11:35:47,520 INFO L175 Difference]: Start difference. First operand has 412 places, 554 transitions, 7792 flow. Second operand 8 states and 195 transitions. [2024-06-14 11:35:47,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 586 transitions, 9554 flow [2024-06-14 11:35:51,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 586 transitions, 9204 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:51,267 INFO L231 Difference]: Finished difference. Result has 415 places, 559 transitions, 7891 flow [2024-06-14 11:35:51,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7442, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7891, PETRI_PLACES=415, PETRI_TRANSITIONS=559} [2024-06-14 11:35:51,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-14 11:35:51,268 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 559 transitions, 7891 flow [2024-06-14 11:35:51,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:51,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:51,268 INFO 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 11:35:51,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 11:35:51,268 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 11:35:51,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash -196720386, now seen corresponding path program 1 times [2024-06-14 11:35:51,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:51,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345856948] [2024-06-14 11:35:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:51,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:51,381 INFO 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 11:35:51,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:51,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345856948] [2024-06-14 11:35:51,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345856948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:51,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:51,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:51,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002102452] [2024-06-14 11:35:51,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:51,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:51,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:51,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:51,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:51,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 559 transitions, 7891 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:51,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:51,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:51,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:52,858 INFO L124 PetriNetUnfolderBase]: 3580/6074 cut-off events. [2024-06-14 11:35:52,858 INFO L125 PetriNetUnfolderBase]: For 741083/741089 co-relation queries the response was YES. [2024-06-14 11:35:52,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44392 conditions, 6074 events. 3580/6074 cut-off events. For 741083/741089 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42034 event pairs, 695 based on Foata normal form. 16/6084 useless extension candidates. Maximal degree in co-relation 44199. Up to 4984 conditions per place. [2024-06-14 11:35:52,997 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 169 changer transitions 0/588 dead transitions. [2024-06-14 11:35:52,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 588 transitions, 9621 flow [2024-06-14 11:35:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:35:52,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 11:35:52,998 INFO L175 Difference]: Start difference. First operand has 415 places, 559 transitions, 7891 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:35:52,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 588 transitions, 9621 flow [2024-06-14 11:35:58,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 588 transitions, 9252 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:58,402 INFO L231 Difference]: Finished difference. Result has 418 places, 561 transitions, 7919 flow [2024-06-14 11:35:58,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7522, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7919, PETRI_PLACES=418, PETRI_TRANSITIONS=561} [2024-06-14 11:35:58,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 11:35:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 561 transitions, 7919 flow [2024-06-14 11:35:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:58,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:58,404 INFO 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 11:35:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 11:35:58,404 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 11:35:58,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2144049904, now seen corresponding path program 1 times [2024-06-14 11:35:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158436635] [2024-06-14 11:35:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:58,569 INFO 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 11:35:58,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:58,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158436635] [2024-06-14 11:35:58,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158436635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:58,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:58,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:58,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625718925] [2024-06-14 11:35:58,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:58,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:58,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:58,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:58,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:35:58,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 561 transitions, 7919 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:58,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:58,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:35:58,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:59,991 INFO L124 PetriNetUnfolderBase]: 3588/6083 cut-off events. [2024-06-14 11:35:59,992 INFO L125 PetriNetUnfolderBase]: For 692972/692978 co-relation queries the response was YES. [2024-06-14 11:36:00,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44504 conditions, 6083 events. 3588/6083 cut-off events. For 692972/692978 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42029 event pairs, 674 based on Foata normal form. 6/6084 useless extension candidates. Maximal degree in co-relation 44310. Up to 5427 conditions per place. [2024-06-14 11:36:00,076 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 67 changer transitions 0/582 dead transitions. [2024-06-14 11:36:00,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 582 transitions, 9179 flow [2024-06-14 11:36:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:36:00,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 11:36:00,077 INFO L175 Difference]: Start difference. First operand has 418 places, 561 transitions, 7919 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:36:00,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 582 transitions, 9179 flow [2024-06-14 11:36:04,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 582 transitions, 8804 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:04,100 INFO L231 Difference]: Finished difference. Result has 420 places, 563 transitions, 7751 flow [2024-06-14 11:36:04,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7544, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7751, PETRI_PLACES=420, PETRI_TRANSITIONS=563} [2024-06-14 11:36:04,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-14 11:36:04,101 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 563 transitions, 7751 flow [2024-06-14 11:36:04,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:04,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:04,101 INFO 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 11:36:04,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 11:36:04,101 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 11:36:04,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:04,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1347222244, now seen corresponding path program 2 times [2024-06-14 11:36:04,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:04,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775544995] [2024-06-14 11:36:04,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:04,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:04,227 INFO 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 11:36:04,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775544995] [2024-06-14 11:36:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775544995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:04,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:04,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:04,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590056605] [2024-06-14 11:36:04,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:04,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:04,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 563 transitions, 7751 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:04,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:04,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:04,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:05,503 INFO L124 PetriNetUnfolderBase]: 3596/6091 cut-off events. [2024-06-14 11:36:05,503 INFO L125 PetriNetUnfolderBase]: For 703269/703275 co-relation queries the response was YES. [2024-06-14 11:36:05,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44228 conditions, 6091 events. 3596/6091 cut-off events. For 703269/703275 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42089 event pairs, 666 based on Foata normal form. 6/6092 useless extension candidates. Maximal degree in co-relation 44033. Up to 5419 conditions per place. [2024-06-14 11:36:05,601 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 72 changer transitions 0/586 dead transitions. [2024-06-14 11:36:05,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 586 transitions, 9027 flow [2024-06-14 11:36:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:36:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:36:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 11:36:05,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 11:36:05,602 INFO L175 Difference]: Start difference. First operand has 420 places, 563 transitions, 7751 flow. Second operand 9 states and 201 transitions. [2024-06-14 11:36:05,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 586 transitions, 9027 flow [2024-06-14 11:36:09,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 586 transitions, 8836 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:09,954 INFO L231 Difference]: Finished difference. Result has 423 places, 565 transitions, 7781 flow [2024-06-14 11:36:09,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7781, PETRI_PLACES=423, PETRI_TRANSITIONS=565} [2024-06-14 11:36:09,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 11:36:09,955 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 565 transitions, 7781 flow [2024-06-14 11:36:09,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:09,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:09,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:09,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 11:36:09,955 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 11:36:09,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2096488546, now seen corresponding path program 13 times [2024-06-14 11:36:09,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:09,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785301327] [2024-06-14 11:36:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:10,053 INFO 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 11:36:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785301327] [2024-06-14 11:36:10,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785301327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:10,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:10,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:10,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690087016] [2024-06-14 11:36:10,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:10,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 565 transitions, 7781 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:10,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:11,335 INFO L124 PetriNetUnfolderBase]: 3617/6129 cut-off events. [2024-06-14 11:36:11,335 INFO L125 PetriNetUnfolderBase]: For 722763/722769 co-relation queries the response was YES. [2024-06-14 11:36:11,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44719 conditions, 6129 events. 3617/6129 cut-off events. For 722763/722769 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42408 event pairs, 723 based on Foata normal form. 1/6122 useless extension candidates. Maximal degree in co-relation 44523. Up to 5226 conditions per place. [2024-06-14 11:36:11,436 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 165 changer transitions 0/603 dead transitions. [2024-06-14 11:36:11,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 603 transitions, 9817 flow [2024-06-14 11:36:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:36:11,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 11:36:11,438 INFO L175 Difference]: Start difference. First operand has 423 places, 565 transitions, 7781 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:36:11,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 603 transitions, 9817 flow [2024-06-14 11:36:15,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 603 transitions, 9612 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:15,308 INFO L231 Difference]: Finished difference. Result has 423 places, 574 transitions, 8018 flow [2024-06-14 11:36:15,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7576, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8018, PETRI_PLACES=423, PETRI_TRANSITIONS=574} [2024-06-14 11:36:15,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 11:36:15,309 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 574 transitions, 8018 flow [2024-06-14 11:36:15,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:15,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:15,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:15,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 11:36:15,309 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 11:36:15,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2096608516, now seen corresponding path program 14 times [2024-06-14 11:36:15,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:15,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533695873] [2024-06-14 11:36:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:15,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:15,415 INFO 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 11:36:15,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:15,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533695873] [2024-06-14 11:36:15,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533695873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:15,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:15,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:15,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13606462] [2024-06-14 11:36:15,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:15,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:15,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:15,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:15,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:15,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:15,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 574 transitions, 8018 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:15,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:15,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:15,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:16,738 INFO L124 PetriNetUnfolderBase]: 3614/6127 cut-off events. [2024-06-14 11:36:16,738 INFO L125 PetriNetUnfolderBase]: For 728724/728730 co-relation queries the response was YES. [2024-06-14 11:36:16,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44835 conditions, 6127 events. 3614/6127 cut-off events. For 728724/728730 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42468 event pairs, 683 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 44638. Up to 5437 conditions per place. [2024-06-14 11:36:16,838 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 72 changer transitions 0/597 dead transitions. [2024-06-14 11:36:16,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 597 transitions, 9256 flow [2024-06-14 11:36:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:36:16,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 11:36:16,840 INFO L175 Difference]: Start difference. First operand has 423 places, 574 transitions, 8018 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:36:16,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 597 transitions, 9256 flow [2024-06-14 11:36:21,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 597 transitions, 8892 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:21,273 INFO L231 Difference]: Finished difference. Result has 426 places, 574 transitions, 7804 flow [2024-06-14 11:36:21,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7654, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7804, PETRI_PLACES=426, PETRI_TRANSITIONS=574} [2024-06-14 11:36:21,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-14 11:36:21,273 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 574 transitions, 7804 flow [2024-06-14 11:36:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:21,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:21,274 INFO 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 11:36:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 11:36:21,274 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 11:36:21,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash -210019862, now seen corresponding path program 15 times [2024-06-14 11:36:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135560318] [2024-06-14 11:36:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:21,369 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 11:36:21,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:21,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135560318] [2024-06-14 11:36:21,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135560318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:21,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:21,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:21,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853314318] [2024-06-14 11:36:21,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:21,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:21,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:21,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 574 transitions, 7804 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:21,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:21,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:21,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:22,834 INFO L124 PetriNetUnfolderBase]: 3635/6148 cut-off events. [2024-06-14 11:36:22,835 INFO L125 PetriNetUnfolderBase]: For 754906/754912 co-relation queries the response was YES. [2024-06-14 11:36:22,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45045 conditions, 6148 events. 3635/6148 cut-off events. For 754906/754912 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 42636 event pairs, 714 based on Foata normal form. 5/6141 useless extension candidates. Maximal degree in co-relation 44847. Up to 5247 conditions per place. [2024-06-14 11:36:22,955 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 428 selfloop transitions, 170 changer transitions 0/605 dead transitions. [2024-06-14 11:36:22,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 605 transitions, 9606 flow [2024-06-14 11:36:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:36:22,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-14 11:36:22,957 INFO L175 Difference]: Start difference. First operand has 426 places, 574 transitions, 7804 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:36:22,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 605 transitions, 9606 flow [2024-06-14 11:36:28,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 605 transitions, 9450 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:28,942 INFO L231 Difference]: Finished difference. Result has 426 places, 583 transitions, 8094 flow [2024-06-14 11:36:28,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7648, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8094, PETRI_PLACES=426, PETRI_TRANSITIONS=583} [2024-06-14 11:36:28,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-14 11:36:28,943 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 583 transitions, 8094 flow [2024-06-14 11:36:28,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:28,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:28,943 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] [2024-06-14 11:36:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 11:36:28,944 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 11:36:28,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1161480974, now seen corresponding path program 16 times [2024-06-14 11:36:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875393349] [2024-06-14 11:36:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:29,064 INFO 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 11:36:29,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:29,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875393349] [2024-06-14 11:36:29,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875393349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:29,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:29,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:29,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302159819] [2024-06-14 11:36:29,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:29,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:29,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:29,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:29,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 583 transitions, 8094 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:29,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:29,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:29,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:30,638 INFO L124 PetriNetUnfolderBase]: 3640/6167 cut-off events. [2024-06-14 11:36:30,638 INFO L125 PetriNetUnfolderBase]: For 766301/766307 co-relation queries the response was YES. [2024-06-14 11:36:30,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45471 conditions, 6167 events. 3640/6167 cut-off events. For 766301/766307 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42710 event pairs, 723 based on Foata normal form. 1/6160 useless extension candidates. Maximal degree in co-relation 45272. Up to 5253 conditions per place. [2024-06-14 11:36:30,731 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 172 changer transitions 0/613 dead transitions. [2024-06-14 11:36:30,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 613 transitions, 10324 flow [2024-06-14 11:36:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:36:30,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-14 11:36:30,732 INFO L175 Difference]: Start difference. First operand has 426 places, 583 transitions, 8094 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:36:30,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 613 transitions, 10324 flow [2024-06-14 11:36:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 613 transitions, 10060 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:35,755 INFO L231 Difference]: Finished difference. Result has 430 places, 586 transitions, 8220 flow [2024-06-14 11:36:35,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7841, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8220, PETRI_PLACES=430, PETRI_TRANSITIONS=586} [2024-06-14 11:36:35,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 11:36:35,757 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 586 transitions, 8220 flow [2024-06-14 11:36:35,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:35,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:35,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 11:36:35,758 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 11:36:35,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2087514980, now seen corresponding path program 17 times [2024-06-14 11:36:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501684969] [2024-06-14 11:36:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:35,855 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 11:36:35,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:35,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501684969] [2024-06-14 11:36:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501684969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:35,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:35,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055447969] [2024-06-14 11:36:35,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:35,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:35,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:35,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:35,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:35,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 586 transitions, 8220 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:35,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:35,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:37,181 INFO L124 PetriNetUnfolderBase]: 3637/6163 cut-off events. [2024-06-14 11:36:37,182 INFO L125 PetriNetUnfolderBase]: For 772968/772974 co-relation queries the response was YES. [2024-06-14 11:36:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45464 conditions, 6163 events. 3637/6163 cut-off events. For 772968/772974 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42724 event pairs, 721 based on Foata normal form. 1/6156 useless extension candidates. Maximal degree in co-relation 45264. Up to 5250 conditions per place. [2024-06-14 11:36:37,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 170 changer transitions 0/609 dead transitions. [2024-06-14 11:36:37,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 609 transitions, 10170 flow [2024-06-14 11:36:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:36:37,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:36:37,286 INFO L175 Difference]: Start difference. First operand has 430 places, 586 transitions, 8220 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:36:37,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 609 transitions, 10170 flow [2024-06-14 11:36:42,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 609 transitions, 9663 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:42,164 INFO L231 Difference]: Finished difference. Result has 431 places, 586 transitions, 8059 flow [2024-06-14 11:36:42,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7713, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8059, PETRI_PLACES=431, PETRI_TRANSITIONS=586} [2024-06-14 11:36:42,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-14 11:36:42,165 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 586 transitions, 8059 flow [2024-06-14 11:36:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:42,165 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] [2024-06-14 11:36:42,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 11:36:42,166 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 11:36:42,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:42,166 INFO L85 PathProgramCache]: Analyzing trace with hash -321401828, now seen corresponding path program 18 times [2024-06-14 11:36:42,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:42,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132546834] [2024-06-14 11:36:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:42,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:42,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132546834] [2024-06-14 11:36:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132546834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:42,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:42,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018708836] [2024-06-14 11:36:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:42,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:42,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:42,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 586 transitions, 8059 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:42,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:42,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:43,640 INFO L124 PetriNetUnfolderBase]: 3642/6162 cut-off events. [2024-06-14 11:36:43,641 INFO L125 PetriNetUnfolderBase]: For 785731/785737 co-relation queries the response was YES. [2024-06-14 11:36:43,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 6162 events. 3642/6162 cut-off events. For 785731/785737 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42732 event pairs, 714 based on Foata normal form. 5/6155 useless extension candidates. Maximal degree in co-relation 45289. Up to 5256 conditions per place. [2024-06-14 11:36:43,739 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 428 selfloop transitions, 173 changer transitions 0/608 dead transitions. [2024-06-14 11:36:43,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 608 transitions, 9803 flow [2024-06-14 11:36:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:36:43,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 11:36:43,740 INFO L175 Difference]: Start difference. First operand has 431 places, 586 transitions, 8059 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:36:43,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 608 transitions, 9803 flow [2024-06-14 11:36:48,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 608 transitions, 9484 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:48,436 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 8124 flow [2024-06-14 11:36:48,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7746, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8124, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-14 11:36:48,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 11:36:48,437 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 8124 flow [2024-06-14 11:36:48,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:48,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:48,437 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 11:36:48,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 11:36:48,437 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 11:36:48,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:48,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1187112470, now seen corresponding path program 19 times [2024-06-14 11:36:48,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:48,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696481636] [2024-06-14 11:36:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:48,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:48,535 INFO 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 11:36:48,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:48,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696481636] [2024-06-14 11:36:48,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696481636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:48,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:48,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:48,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9522953] [2024-06-14 11:36:48,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:48,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:48,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:48,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 8124 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:48,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:48,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:48,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:49,845 INFO L124 PetriNetUnfolderBase]: 3639/6158 cut-off events. [2024-06-14 11:36:49,845 INFO L125 PetriNetUnfolderBase]: For 791772/791778 co-relation queries the response was YES. [2024-06-14 11:36:49,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45480 conditions, 6158 events. 3639/6158 cut-off events. For 791772/791778 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42732 event pairs, 716 based on Foata normal form. 5/6151 useless extension candidates. Maximal degree in co-relation 45278. Up to 5253 conditions per place. [2024-06-14 11:36:49,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 420 selfloop transitions, 177 changer transitions 0/604 dead transitions. [2024-06-14 11:36:49,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 604 transitions, 9588 flow [2024-06-14 11:36:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 11:36:49,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-14 11:36:49,948 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 8124 flow. Second operand 7 states and 162 transitions. [2024-06-14 11:36:49,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 604 transitions, 9588 flow [2024-06-14 11:36:56,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 604 transitions, 9253 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:56,685 INFO L231 Difference]: Finished difference. Result has 437 places, 589 transitions, 8149 flow [2024-06-14 11:36:56,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8149, PETRI_PLACES=437, PETRI_TRANSITIONS=589} [2024-06-14 11:36:56,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 11:36:56,686 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 589 transitions, 8149 flow [2024-06-14 11:36:56,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:56,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:56,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 11:36:56,687 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 11:36:56,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:56,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1230115602, now seen corresponding path program 20 times [2024-06-14 11:36:56,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:56,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923929330] [2024-06-14 11:36:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:56,802 INFO 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 11:36:56,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:56,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923929330] [2024-06-14 11:36:56,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923929330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:56,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:56,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:56,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509033711] [2024-06-14 11:36:56,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:56,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:56,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:36:56,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 589 transitions, 8149 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:56,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:36:56,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:58,194 INFO L124 PetriNetUnfolderBase]: 3636/6166 cut-off events. [2024-06-14 11:36:58,194 INFO L125 PetriNetUnfolderBase]: For 796221/796227 co-relation queries the response was YES. [2024-06-14 11:36:58,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45472 conditions, 6166 events. 3636/6166 cut-off events. For 796221/796227 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42878 event pairs, 683 based on Foata normal form. 5/6165 useless extension candidates. Maximal degree in co-relation 45269. Up to 5458 conditions per place. [2024-06-14 11:36:58,291 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 523 selfloop transitions, 79 changer transitions 0/609 dead transitions. [2024-06-14 11:36:58,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 609 transitions, 9637 flow [2024-06-14 11:36:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:36:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:36:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 11:36:58,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-14 11:36:58,292 INFO L175 Difference]: Start difference. First operand has 437 places, 589 transitions, 8149 flow. Second operand 9 states and 203 transitions. [2024-06-14 11:36:58,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 609 transitions, 9637 flow [2024-06-14 11:37:03,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 609 transitions, 9221 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:03,878 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 7897 flow [2024-06-14 11:37:03,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7897, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-14 11:37:03,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 11:37:03,878 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 7897 flow [2024-06-14 11:37:03,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:03,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:03,879 INFO 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 11:37:03,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 11:37:03,879 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 11:37:03,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:03,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1768107410, now seen corresponding path program 21 times [2024-06-14 11:37:03,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:03,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33320448] [2024-06-14 11:37:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:03,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:03,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33320448] [2024-06-14 11:37:03,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33320448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:03,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:03,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:03,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2825251] [2024-06-14 11:37:03,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:03,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:04,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:04,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 7897 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:04,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:04,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:04,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:05,306 INFO L124 PetriNetUnfolderBase]: 3633/6162 cut-off events. [2024-06-14 11:37:05,306 INFO L125 PetriNetUnfolderBase]: For 801080/801086 co-relation queries the response was YES. [2024-06-14 11:37:05,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45065 conditions, 6162 events. 3633/6162 cut-off events. For 801080/801086 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42764 event pairs, 681 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 44862. Up to 5455 conditions per place. [2024-06-14 11:37:05,406 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 521 selfloop transitions, 78 changer transitions 0/606 dead transitions. [2024-06-14 11:37:05,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 606 transitions, 9137 flow [2024-06-14 11:37:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:37:05,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 11:37:05,407 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 7897 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:37:05,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 606 transitions, 9137 flow [2024-06-14 11:37:10,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 606 transitions, 8992 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:10,584 INFO L231 Difference]: Finished difference. Result has 441 places, 589 transitions, 7914 flow [2024-06-14 11:37:10,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7752, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7914, PETRI_PLACES=441, PETRI_TRANSITIONS=589} [2024-06-14 11:37:10,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 11:37:10,585 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 589 transitions, 7914 flow [2024-06-14 11:37:10,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:10,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:10,585 INFO 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 11:37:10,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 11:37:10,585 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 11:37:10,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash -115104022, now seen corresponding path program 22 times [2024-06-14 11:37:10,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:10,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510313764] [2024-06-14 11:37:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:10,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:10,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:10,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510313764] [2024-06-14 11:37:10,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510313764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:10,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:10,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436895048] [2024-06-14 11:37:10,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:10,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:10,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:10,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 589 transitions, 7914 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:10,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:10,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:10,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:12,099 INFO L124 PetriNetUnfolderBase]: 3630/6146 cut-off events. [2024-06-14 11:37:12,099 INFO L125 PetriNetUnfolderBase]: For 808740/808746 co-relation queries the response was YES. [2024-06-14 11:37:12,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45037 conditions, 6146 events. 3630/6146 cut-off events. For 808740/808746 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42678 event pairs, 714 based on Foata normal form. 5/6139 useless extension candidates. Maximal degree in co-relation 44833. Up to 5289 conditions per place. [2024-06-14 11:37:12,193 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 459 selfloop transitions, 143 changer transitions 0/609 dead transitions. [2024-06-14 11:37:12,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 609 transitions, 9408 flow [2024-06-14 11:37:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:37:12,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:37:12,194 INFO L175 Difference]: Start difference. First operand has 441 places, 589 transitions, 7914 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:37:12,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 609 transitions, 9408 flow [2024-06-14 11:37:17,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 609 transitions, 9227 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:17,118 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 8030 flow [2024-06-14 11:37:17,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8030, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-14 11:37:17,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 11:37:17,119 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 8030 flow [2024-06-14 11:37:17,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:17,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:17,119 INFO 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 11:37:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 11:37:17,120 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 11:37:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 482905666, now seen corresponding path program 23 times [2024-06-14 11:37:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121676214] [2024-06-14 11:37:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:17,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121676214] [2024-06-14 11:37:17,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121676214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:17,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:17,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:17,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299567296] [2024-06-14 11:37:17,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:17,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:17,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:17,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:17,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 8030 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:17,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:17,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:17,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:18,524 INFO L124 PetriNetUnfolderBase]: 3627/6154 cut-off events. [2024-06-14 11:37:18,524 INFO L125 PetriNetUnfolderBase]: For 812524/812530 co-relation queries the response was YES. [2024-06-14 11:37:18,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45193 conditions, 6154 events. 3627/6154 cut-off events. For 812524/812530 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42722 event pairs, 683 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 44988. Up to 5286 conditions per place. [2024-06-14 11:37:18,627 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 458 selfloop transitions, 156 changer transitions 0/621 dead transitions. [2024-06-14 11:37:18,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 621 transitions, 9822 flow [2024-06-14 11:37:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 11:37:18,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 11:37:18,628 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 8030 flow. Second operand 8 states and 202 transitions. [2024-06-14 11:37:18,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 621 transitions, 9822 flow [2024-06-14 11:37:23,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 621 transitions, 9441 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:37:23,829 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 7980 flow [2024-06-14 11:37:23,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7980, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-14 11:37:23,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 11:37:23,830 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 7980 flow [2024-06-14 11:37:23,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:23,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:23,830 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] [2024-06-14 11:37:23,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 11:37:23,831 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 11:37:23,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash 56670884, now seen corresponding path program 13 times [2024-06-14 11:37:23,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:23,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102030498] [2024-06-14 11:37:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:23,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:23,939 INFO 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 11:37:23,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102030498] [2024-06-14 11:37:23,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102030498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:23,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:23,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094901651] [2024-06-14 11:37:23,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:23,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:23,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:23,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:23,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 7980 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:23,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:23,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:25,299 INFO L124 PetriNetUnfolderBase]: 3632/6142 cut-off events. [2024-06-14 11:37:25,299 INFO L125 PetriNetUnfolderBase]: For 810896/810896 co-relation queries the response was YES. [2024-06-14 11:37:25,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45229 conditions, 6142 events. 3632/6142 cut-off events. For 810896/810896 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42621 event pairs, 707 based on Foata normal form. 1/6131 useless extension candidates. Maximal degree in co-relation 45024. Up to 5310 conditions per place. [2024-06-14 11:37:25,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 164 changer transitions 0/609 dead transitions. [2024-06-14 11:37:25,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 609 transitions, 9755 flow [2024-06-14 11:37:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 11:37:25,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-14 11:37:25,393 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 7980 flow. Second operand 8 states and 185 transitions. [2024-06-14 11:37:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 609 transitions, 9755 flow [2024-06-14 11:37:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 609 transitions, 9382 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 11:37:29,909 INFO L231 Difference]: Finished difference. Result has 438 places, 592 transitions, 7996 flow [2024-06-14 11:37:29,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7615, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7996, PETRI_PLACES=438, PETRI_TRANSITIONS=592} [2024-06-14 11:37:29,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-14 11:37:29,910 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 592 transitions, 7996 flow [2024-06-14 11:37:29,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:29,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:29,910 INFO 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 11:37:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 11:37:29,910 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 11:37:29,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1422778648, now seen corresponding path program 24 times [2024-06-14 11:37:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583963726] [2024-06-14 11:37:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:30,010 INFO 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 11:37:30,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:30,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583963726] [2024-06-14 11:37:30,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583963726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:30,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:30,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928985404] [2024-06-14 11:37:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:30,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:30,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:30,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:30,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 592 transitions, 7996 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:30,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:30,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:31,347 INFO L124 PetriNetUnfolderBase]: 3629/6159 cut-off events. [2024-06-14 11:37:31,347 INFO L125 PetriNetUnfolderBase]: For 792645/792651 co-relation queries the response was YES. [2024-06-14 11:37:31,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44960 conditions, 6159 events. 3629/6159 cut-off events. For 792645/792651 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42796 event pairs, 681 based on Foata normal form. 5/6158 useless extension candidates. Maximal degree in co-relation 44756. Up to 5290 conditions per place. [2024-06-14 11:37:31,447 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 163 changer transitions 0/630 dead transitions. [2024-06-14 11:37:31,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 630 transitions, 9578 flow [2024-06-14 11:37:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:37:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:37:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 11:37:31,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-14 11:37:31,448 INFO L175 Difference]: Start difference. First operand has 438 places, 592 transitions, 7996 flow. Second operand 9 states and 224 transitions. [2024-06-14 11:37:31,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 630 transitions, 9578 flow [2024-06-14 11:37:36,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 630 transitions, 9385 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:36,574 INFO L231 Difference]: Finished difference. Result has 443 places, 592 transitions, 8147 flow [2024-06-14 11:37:36,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7803, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8147, PETRI_PLACES=443, PETRI_TRANSITIONS=592} [2024-06-14 11:37:36,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-14 11:37:36,574 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 592 transitions, 8147 flow [2024-06-14 11:37:36,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:36,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:36,575 INFO 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 11:37:36,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 11:37:36,575 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 11:37:36,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:36,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1726855132, now seen corresponding path program 14 times [2024-06-14 11:37:36,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:36,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936927193] [2024-06-14 11:37:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:36,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:36,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:36,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936927193] [2024-06-14 11:37:36,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936927193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:36,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:36,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:36,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141807471] [2024-06-14 11:37:36,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:36,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:36,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:36,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:36,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 592 transitions, 8147 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:36,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:36,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:36,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:38,061 INFO L124 PetriNetUnfolderBase]: 3626/6155 cut-off events. [2024-06-14 11:37:38,061 INFO L125 PetriNetUnfolderBase]: For 799926/799932 co-relation queries the response was YES. [2024-06-14 11:37:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45022 conditions, 6155 events. 3626/6155 cut-off events. For 799926/799932 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42755 event pairs, 699 based on Foata normal form. 5/6154 useless extension candidates. Maximal degree in co-relation 44816. Up to 5303 conditions per place. [2024-06-14 11:37:38,165 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 441 selfloop transitions, 164 changer transitions 0/612 dead transitions. [2024-06-14 11:37:38,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 612 transitions, 10131 flow [2024-06-14 11:37:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:37:38,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 11:37:38,166 INFO L175 Difference]: Start difference. First operand has 443 places, 592 transitions, 8147 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:37:38,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 612 transitions, 10131 flow [2024-06-14 11:37:43,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 612 transitions, 9769 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-14 11:37:43,417 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 8141 flow [2024-06-14 11:37:43,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7803, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8141, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-14 11:37:43,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 11:37:43,418 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 8141 flow [2024-06-14 11:37:43,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:43,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:43,418 INFO 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 11:37:43,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 11:37:43,418 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 11:37:43,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1977746284, now seen corresponding path program 15 times [2024-06-14 11:37:43,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:43,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374805364] [2024-06-14 11:37:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:43,540 INFO 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 11:37:43,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:43,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374805364] [2024-06-14 11:37:43,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374805364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:43,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:43,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:43,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910426442] [2024-06-14 11:37:43,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:43,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:43,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:43,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:43,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 8141 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:43,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:43,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:43,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:44,870 INFO L124 PetriNetUnfolderBase]: 3631/6162 cut-off events. [2024-06-14 11:37:44,870 INFO L125 PetriNetUnfolderBase]: For 775950/775956 co-relation queries the response was YES. [2024-06-14 11:37:44,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44832 conditions, 6162 events. 3631/6162 cut-off events. For 775950/775956 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42816 event pairs, 706 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 44628. Up to 5309 conditions per place. [2024-06-14 11:37:44,969 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 167 changer transitions 0/614 dead transitions. [2024-06-14 11:37:44,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 614 transitions, 9936 flow [2024-06-14 11:37:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:37:44,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-14 11:37:44,970 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 8141 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:37:44,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 614 transitions, 9936 flow [2024-06-14 11:37:50,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 614 transitions, 9436 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:50,577 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 8048 flow [2024-06-14 11:37:50,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8048, PETRI_PLACES=439, PETRI_TRANSITIONS=595} [2024-06-14 11:37:50,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 11:37:50,578 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 8048 flow [2024-06-14 11:37:50,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:50,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:50,578 INFO 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 11:37:50,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 11:37:50,578 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 11:37:50,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash 27061186, now seen corresponding path program 16 times [2024-06-14 11:37:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:50,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158049287] [2024-06-14 11:37:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:50,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158049287] [2024-06-14 11:37:50,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158049287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:50,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:50,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143791852] [2024-06-14 11:37:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:50,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:50,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:50,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 595 transitions, 8048 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:50,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:50,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:50,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:52,496 INFO L124 PetriNetUnfolderBase]: 3628/6155 cut-off events. [2024-06-14 11:37:52,496 INFO L125 PetriNetUnfolderBase]: For 762671/762671 co-relation queries the response was YES. [2024-06-14 11:37:52,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44479 conditions, 6155 events. 3628/6155 cut-off events. For 762671/762671 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42691 event pairs, 654 based on Foata normal form. 1/6153 useless extension candidates. Maximal degree in co-relation 44276. Up to 5433 conditions per place. [2024-06-14 11:37:52,624 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 89 changer transitions 0/618 dead transitions. [2024-06-14 11:37:52,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 618 transitions, 9566 flow [2024-06-14 11:37:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 11:37:52,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 11:37:52,626 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 8048 flow. Second operand 6 states and 156 transitions. [2024-06-14 11:37:52,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 618 transitions, 9566 flow [2024-06-14 11:37:58,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 618 transitions, 9325 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:58,620 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 8008 flow [2024-06-14 11:37:58,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7809, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8008, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-14 11:37:58,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 11:37:58,621 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 8008 flow [2024-06-14 11:37:58,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:58,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:58,621 INFO 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 11:37:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 11:37:58,622 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 11:37:58,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash 26883556, now seen corresponding path program 17 times [2024-06-14 11:37:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582385942] [2024-06-14 11:37:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:58,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:58,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:58,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582385942] [2024-06-14 11:37:58,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582385942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:58,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:58,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:58,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187658752] [2024-06-14 11:37:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:58,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:58,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:58,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:37:58,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 8008 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:58,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:58,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:37:58,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:00,791 INFO L124 PetriNetUnfolderBase]: 3625/6151 cut-off events. [2024-06-14 11:38:00,791 INFO L125 PetriNetUnfolderBase]: For 755822/755822 co-relation queries the response was YES. [2024-06-14 11:38:00,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44197 conditions, 6151 events. 3625/6151 cut-off events. For 755822/755822 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42621 event pairs, 654 based on Foata normal form. 1/6149 useless extension candidates. Maximal degree in co-relation 43993. Up to 5430 conditions per place. [2024-06-14 11:38:00,921 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-14 11:38:00,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 624 transitions, 9316 flow [2024-06-14 11:38:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:38:00,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 11:38:00,923 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 8008 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:38:00,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 624 transitions, 9316 flow [2024-06-14 11:38:07,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 624 transitions, 9007 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:07,175 INFO L231 Difference]: Finished difference. Result has 441 places, 595 transitions, 7901 flow [2024-06-14 11:38:07,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7699, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7901, PETRI_PLACES=441, PETRI_TRANSITIONS=595} [2024-06-14 11:38:07,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 11:38:07,176 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 595 transitions, 7901 flow [2024-06-14 11:38:07,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:07,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:07,176 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 11:38:07,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 11:38:07,177 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 11:38:07,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash 567125032, now seen corresponding path program 18 times [2024-06-14 11:38:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429439099] [2024-06-14 11:38:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:07,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:07,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429439099] [2024-06-14 11:38:07,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429439099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:07,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:07,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389206352] [2024-06-14 11:38:07,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:07,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:07,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:07,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:07,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 595 transitions, 7901 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:07,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:07,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:07,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:08,825 INFO L124 PetriNetUnfolderBase]: 3622/6149 cut-off events. [2024-06-14 11:38:08,826 INFO L125 PetriNetUnfolderBase]: For 751362/751368 co-relation queries the response was YES. [2024-06-14 11:38:08,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44026 conditions, 6149 events. 3622/6149 cut-off events. For 751362/751368 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42713 event pairs, 690 based on Foata normal form. 5/6149 useless extension candidates. Maximal degree in co-relation 43821. Up to 5300 conditions per place. [2024-06-14 11:38:08,918 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 444 selfloop transitions, 172 changer transitions 0/623 dead transitions. [2024-06-14 11:38:08,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 623 transitions, 9679 flow [2024-06-14 11:38:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:38:08,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 11:38:08,919 INFO L175 Difference]: Start difference. First operand has 441 places, 595 transitions, 7901 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:38:08,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 623 transitions, 9679 flow [2024-06-14 11:38:13,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 623 transitions, 9471 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:13,807 INFO L231 Difference]: Finished difference. Result has 442 places, 595 transitions, 8059 flow [2024-06-14 11:38:13,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7697, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8059, PETRI_PLACES=442, PETRI_TRANSITIONS=595} [2024-06-14 11:38:13,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 11:38:13,807 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 595 transitions, 8059 flow [2024-06-14 11:38:13,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:13,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:13,808 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] [2024-06-14 11:38:13,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 11:38:13,808 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 11:38:13,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash -168853478, now seen corresponding path program 19 times [2024-06-14 11:38:13,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:13,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569097094] [2024-06-14 11:38:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:13,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:13,979 INFO 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 11:38:13,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:13,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569097094] [2024-06-14 11:38:13,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569097094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:13,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:13,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:13,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9062117] [2024-06-14 11:38:13,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:13,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:13,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:14,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:14,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 595 transitions, 8059 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:14,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:14,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:14,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:15,377 INFO L124 PetriNetUnfolderBase]: 3619/6125 cut-off events. [2024-06-14 11:38:15,377 INFO L125 PetriNetUnfolderBase]: For 745629/745629 co-relation queries the response was YES. [2024-06-14 11:38:15,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44035 conditions, 6125 events. 3619/6125 cut-off events. For 745629/745629 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42463 event pairs, 705 based on Foata normal form. 1/6114 useless extension candidates. Maximal degree in co-relation 43830. Up to 5297 conditions per place. [2024-06-14 11:38:15,468 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 432 selfloop transitions, 171 changer transitions 0/610 dead transitions. [2024-06-14 11:38:15,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 610 transitions, 9539 flow [2024-06-14 11:38:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:38:15,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-14 11:38:15,469 INFO L175 Difference]: Start difference. First operand has 442 places, 595 transitions, 8059 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:38:15,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 610 transitions, 9539 flow [2024-06-14 11:38:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 610 transitions, 9159 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:38:20,269 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 8037 flow [2024-06-14 11:38:20,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8037, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-14 11:38:20,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 11:38:20,270 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 8037 flow [2024-06-14 11:38:20,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:20,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:20,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:20,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 11:38:20,270 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 11:38:20,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 25 times [2024-06-14 11:38:20,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:20,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229415887] [2024-06-14 11:38:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:20,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:20,396 INFO 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 11:38:20,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229415887] [2024-06-14 11:38:20,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229415887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:20,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:20,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:20,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755315552] [2024-06-14 11:38:20,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:20,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:20,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:20,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:20,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:20,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 8037 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:20,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:20,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:20,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:21,911 INFO L124 PetriNetUnfolderBase]: 3616/6141 cut-off events. [2024-06-14 11:38:21,912 INFO L125 PetriNetUnfolderBase]: For 714150/714156 co-relation queries the response was YES. [2024-06-14 11:38:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43668 conditions, 6141 events. 3616/6141 cut-off events. For 714150/714156 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42627 event pairs, 673 based on Foata normal form. 5/6141 useless extension candidates. Maximal degree in co-relation 43465. Up to 5274 conditions per place. [2024-06-14 11:38:22,142 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 163 changer transitions 0/636 dead transitions. [2024-06-14 11:38:22,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 636 transitions, 9399 flow [2024-06-14 11:38:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:38:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:38:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 11:38:22,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:38:22,144 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 8037 flow. Second operand 10 states and 245 transitions. [2024-06-14 11:38:22,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 636 transitions, 9399 flow [2024-06-14 11:38:26,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 636 transitions, 8948 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 11:38:26,647 INFO L231 Difference]: Finished difference. Result has 442 places, 595 transitions, 7934 flow [2024-06-14 11:38:26,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7934, PETRI_PLACES=442, PETRI_TRANSITIONS=595} [2024-06-14 11:38:26,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 11:38:26,647 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 595 transitions, 7934 flow [2024-06-14 11:38:26,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:26,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:26,648 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 11:38:26,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 11:38:26,648 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 11:38:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 567131542, now seen corresponding path program 20 times [2024-06-14 11:38:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447848969] [2024-06-14 11:38:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:26,758 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 11:38:26,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:26,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447848969] [2024-06-14 11:38:26,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447848969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:26,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:26,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673892904] [2024-06-14 11:38:26,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:26,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:26,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:26,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 595 transitions, 7934 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:26,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:26,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:28,135 INFO L124 PetriNetUnfolderBase]: 3613/6138 cut-off events. [2024-06-14 11:38:28,136 INFO L125 PetriNetUnfolderBase]: For 708087/708093 co-relation queries the response was YES. [2024-06-14 11:38:28,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43518 conditions, 6138 events. 3613/6138 cut-off events. For 708087/708093 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42657 event pairs, 705 based on Foata normal form. 5/6137 useless extension candidates. Maximal degree in co-relation 43315. Up to 5290 conditions per place. [2024-06-14 11:38:28,223 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 171 changer transitions 0/618 dead transitions. [2024-06-14 11:38:28,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 618 transitions, 9214 flow [2024-06-14 11:38:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:38:28,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 11:38:28,224 INFO L175 Difference]: Start difference. First operand has 442 places, 595 transitions, 7934 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:38:28,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 618 transitions, 9214 flow [2024-06-14 11:38:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 618 transitions, 8870 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 11:38:32,642 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 7946 flow [2024-06-14 11:38:32,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7946, PETRI_PLACES=439, PETRI_TRANSITIONS=595} [2024-06-14 11:38:32,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 11:38:32,642 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 7946 flow [2024-06-14 11:38:32,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:32,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:32,643 INFO 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 11:38:32,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 11:38:32,643 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 11:38:32,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash 22296610, now seen corresponding path program 7 times [2024-06-14 11:38:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220045338] [2024-06-14 11:38:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:32,774 INFO 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 11:38:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220045338] [2024-06-14 11:38:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220045338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:32,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:32,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910837775] [2024-06-14 11:38:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:32,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:32,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:32,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 595 transitions, 7946 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:32,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:32,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:32,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:34,196 INFO L124 PetriNetUnfolderBase]: 3669/6227 cut-off events. [2024-06-14 11:38:34,196 INFO L125 PetriNetUnfolderBase]: For 771377/771377 co-relation queries the response was YES. [2024-06-14 11:38:34,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43925 conditions, 6227 events. 3669/6227 cut-off events. For 771377/771377 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43218 event pairs, 536 based on Foata normal form. 16/6240 useless extension candidates. Maximal degree in co-relation 43722. Up to 5338 conditions per place. [2024-06-14 11:38:34,286 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 105 changer transitions 0/630 dead transitions. [2024-06-14 11:38:34,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 630 transitions, 9352 flow [2024-06-14 11:38:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:38:34,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 11:38:34,288 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 7946 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:38:34,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 630 transitions, 9352 flow [2024-06-14 11:38:38,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 630 transitions, 8835 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:38:38,667 INFO L231 Difference]: Finished difference. Result has 436 places, 597 transitions, 7729 flow [2024-06-14 11:38:38,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7729, PETRI_PLACES=436, PETRI_TRANSITIONS=597} [2024-06-14 11:38:38,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 11:38:38,668 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 597 transitions, 7729 flow [2024-06-14 11:38:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:38,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:38,668 INFO 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 11:38:38,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 11:38:38,669 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 11:38:38,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash 938257156, now seen corresponding path program 8 times [2024-06-14 11:38:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:38,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212446930] [2024-06-14 11:38:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:38,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:38,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212446930] [2024-06-14 11:38:38,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212446930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:38,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:38,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222451802] [2024-06-14 11:38:38,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:38,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:38,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 597 transitions, 7729 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:38,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:38,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:38,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:40,237 INFO L124 PetriNetUnfolderBase]: 3725/6314 cut-off events. [2024-06-14 11:38:40,237 INFO L125 PetriNetUnfolderBase]: For 766182/766188 co-relation queries the response was YES. [2024-06-14 11:38:40,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44577 conditions, 6314 events. 3725/6314 cut-off events. For 766182/766188 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43976 event pairs, 724 based on Foata normal form. 20/6328 useless extension candidates. Maximal degree in co-relation 44376. Up to 5338 conditions per place. [2024-06-14 11:38:40,327 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 442 selfloop transitions, 171 changer transitions 0/620 dead transitions. [2024-06-14 11:38:40,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 620 transitions, 9087 flow [2024-06-14 11:38:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:38:40,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 11:38:40,329 INFO L175 Difference]: Start difference. First operand has 436 places, 597 transitions, 7729 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:38:40,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 620 transitions, 9087 flow [2024-06-14 11:38:44,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 620 transitions, 8867 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:44,632 INFO L231 Difference]: Finished difference. Result has 438 places, 599 transitions, 7931 flow [2024-06-14 11:38:44,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7931, PETRI_PLACES=438, PETRI_TRANSITIONS=599} [2024-06-14 11:38:44,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-14 11:38:44,632 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 599 transitions, 7931 flow [2024-06-14 11:38:44,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:44,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:44,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:44,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 11:38:44,633 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 11:38:44,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:44,633 INFO L85 PathProgramCache]: Analyzing trace with hash 567359206, now seen corresponding path program 9 times [2024-06-14 11:38:44,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:44,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547208103] [2024-06-14 11:38:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:44,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547208103] [2024-06-14 11:38:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547208103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:44,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:44,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:44,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264695405] [2024-06-14 11:38:44,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:44,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:44,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:44,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 599 transitions, 7931 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:44,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:44,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:44,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:46,459 INFO L124 PetriNetUnfolderBase]: 3768/6387 cut-off events. [2024-06-14 11:38:46,459 INFO L125 PetriNetUnfolderBase]: For 767372/767378 co-relation queries the response was YES. [2024-06-14 11:38:46,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45058 conditions, 6387 events. 3768/6387 cut-off events. For 767372/767378 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44545 event pairs, 733 based on Foata normal form. 20/6401 useless extension candidates. Maximal degree in co-relation 44856. Up to 5343 conditions per place. [2024-06-14 11:38:46,742 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 444 selfloop transitions, 177 changer transitions 0/628 dead transitions. [2024-06-14 11:38:46,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 628 transitions, 9325 flow [2024-06-14 11:38:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:38:46,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 11:38:46,750 INFO L175 Difference]: Start difference. First operand has 438 places, 599 transitions, 7931 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:38:46,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 628 transitions, 9325 flow [2024-06-14 11:38:50,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 628 transitions, 8939 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:50,754 INFO L231 Difference]: Finished difference. Result has 440 places, 601 transitions, 7987 flow [2024-06-14 11:38:50,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7987, PETRI_PLACES=440, PETRI_TRANSITIONS=601} [2024-06-14 11:38:50,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 11:38:50,755 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 601 transitions, 7987 flow [2024-06-14 11:38:50,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:50,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:50,755 INFO 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 11:38:50,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 11:38:50,755 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 11:38:50,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1350866176, now seen corresponding path program 10 times [2024-06-14 11:38:50,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:50,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126856724] [2024-06-14 11:38:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:50,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:50,859 INFO 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 11:38:50,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:50,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126856724] [2024-06-14 11:38:50,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126856724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:50,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:50,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:50,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656840097] [2024-06-14 11:38:50,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:50,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:50,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:50,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:50,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:50,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:50,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 601 transitions, 7987 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:50,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:50,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:50,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:52,365 INFO L124 PetriNetUnfolderBase]: 3775/6404 cut-off events. [2024-06-14 11:38:52,365 INFO L125 PetriNetUnfolderBase]: For 699801/699807 co-relation queries the response was YES. [2024-06-14 11:38:52,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44300 conditions, 6404 events. 3775/6404 cut-off events. For 699801/699807 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44684 event pairs, 602 based on Foata normal form. 16/6414 useless extension candidates. Maximal degree in co-relation 44097. Up to 4818 conditions per place. [2024-06-14 11:38:52,461 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 426 selfloop transitions, 203 changer transitions 0/636 dead transitions. [2024-06-14 11:38:52,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 636 transitions, 9613 flow [2024-06-14 11:38:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 11:38:52,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-14 11:38:52,462 INFO L175 Difference]: Start difference. First operand has 440 places, 601 transitions, 7987 flow. Second operand 7 states and 183 transitions. [2024-06-14 11:38:52,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 636 transitions, 9613 flow [2024-06-14 11:38:56,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 636 transitions, 9215 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:56,669 INFO L231 Difference]: Finished difference. Result has 441 places, 602 transitions, 8047 flow [2024-06-14 11:38:56,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7595, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8047, PETRI_PLACES=441, PETRI_TRANSITIONS=602} [2024-06-14 11:38:56,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 11:38:56,670 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 602 transitions, 8047 flow [2024-06-14 11:38:56,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:56,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:56,670 INFO 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 11:38:56,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 11:38:56,670 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 11:38:56,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash 874776472, now seen corresponding path program 2 times [2024-06-14 11:38:56,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:56,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967887955] [2024-06-14 11:38:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:56,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:56,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:56,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967887955] [2024-06-14 11:38:56,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967887955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:56,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036451509] [2024-06-14 11:38:56,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:56,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:56,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:56,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:38:56,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 602 transitions, 8047 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:56,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:56,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:38:56,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:58,205 INFO L124 PetriNetUnfolderBase]: 3815/6471 cut-off events. [2024-06-14 11:38:58,206 INFO L125 PetriNetUnfolderBase]: For 686899/686899 co-relation queries the response was YES. [2024-06-14 11:38:58,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44724 conditions, 6471 events. 3815/6471 cut-off events. For 686899/686899 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 45202 event pairs, 544 based on Foata normal form. 12/6480 useless extension candidates. Maximal degree in co-relation 44521. Up to 5512 conditions per place. [2024-06-14 11:38:58,318 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 105 changer transitions 0/634 dead transitions. [2024-06-14 11:38:58,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 634 transitions, 9455 flow [2024-06-14 11:38:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:38:58,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 11:38:58,320 INFO L175 Difference]: Start difference. First operand has 441 places, 602 transitions, 8047 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:38:58,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 634 transitions, 9455 flow [2024-06-14 11:39:02,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 634 transitions, 9058 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:02,789 INFO L231 Difference]: Finished difference. Result has 442 places, 604 transitions, 7927 flow [2024-06-14 11:39:02,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7927, PETRI_PLACES=442, PETRI_TRANSITIONS=604} [2024-06-14 11:39:02,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 11:39:02,790 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 604 transitions, 7927 flow [2024-06-14 11:39:02,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:02,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:02,790 INFO 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 11:39:02,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 11:39:02,790 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 11:39:02,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:02,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1793611426, now seen corresponding path program 3 times [2024-06-14 11:39:02,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:02,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281535126] [2024-06-14 11:39:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:02,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:02,925 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 11:39:02,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281535126] [2024-06-14 11:39:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281535126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:02,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985694387] [2024-06-14 11:39:02,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:02,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:02,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:02,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:02,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:39:02,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 604 transitions, 7927 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:02,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:02,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:39:02,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:04,721 INFO L124 PetriNetUnfolderBase]: 3901/6619 cut-off events. [2024-06-14 11:39:04,722 INFO L125 PetriNetUnfolderBase]: For 729069/729069 co-relation queries the response was YES. [2024-06-14 11:39:04,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46079 conditions, 6619 events. 3901/6619 cut-off events. For 729069/729069 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46429 event pairs, 514 based on Foata normal form. 12/6628 useless extension candidates. Maximal degree in co-relation 45877. Up to 5325 conditions per place. [2024-06-14 11:39:04,848 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 526 selfloop transitions, 103 changer transitions 0/636 dead transitions. [2024-06-14 11:39:04,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 636 transitions, 9597 flow [2024-06-14 11:39:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:39:04,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 11:39:04,850 INFO L175 Difference]: Start difference. First operand has 442 places, 604 transitions, 7927 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:39:04,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 636 transitions, 9597 flow [2024-06-14 11:39:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 636 transitions, 9342 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:10,983 INFO L231 Difference]: Finished difference. Result has 444 places, 607 transitions, 7983 flow [2024-06-14 11:39:10,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7983, PETRI_PLACES=444, PETRI_TRANSITIONS=607} [2024-06-14 11:39:10,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-14 11:39:10,985 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 607 transitions, 7983 flow [2024-06-14 11:39:10,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:10,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:10,985 INFO 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 11:39:10,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 11:39:10,985 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 11:39:10,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1735434940, now seen corresponding path program 4 times [2024-06-14 11:39:10,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:10,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847812940] [2024-06-14 11:39:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:10,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:11,126 INFO 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 11:39:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:11,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847812940] [2024-06-14 11:39:11,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847812940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:11,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:11,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760740199] [2024-06-14 11:39:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:11,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:11,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:39:11,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 607 transitions, 7983 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:11,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:11,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:39:11,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:13,233 INFO L124 PetriNetUnfolderBase]: 3908/6635 cut-off events. [2024-06-14 11:39:13,234 INFO L125 PetriNetUnfolderBase]: For 705321/705327 co-relation queries the response was YES. [2024-06-14 11:39:13,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45491 conditions, 6635 events. 3908/6635 cut-off events. For 705321/705327 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46588 event pairs, 751 based on Foata normal form. 16/6645 useless extension candidates. Maximal degree in co-relation 45288. Up to 5319 conditions per place. [2024-06-14 11:39:13,366 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 185 changer transitions 0/632 dead transitions. [2024-06-14 11:39:13,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 632 transitions, 9349 flow [2024-06-14 11:39:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:39:13,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 11:39:13,368 INFO L175 Difference]: Start difference. First operand has 444 places, 607 transitions, 7983 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:39:13,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 632 transitions, 9349 flow [2024-06-14 11:39:19,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 632 transitions, 9212 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:19,277 INFO L231 Difference]: Finished difference. Result has 448 places, 608 transitions, 8262 flow [2024-06-14 11:39:19,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8262, PETRI_PLACES=448, PETRI_TRANSITIONS=608} [2024-06-14 11:39:19,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-14 11:39:19,278 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 608 transitions, 8262 flow [2024-06-14 11:39:19,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:19,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:19,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:19,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 11:39:19,279 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 11:39:19,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2064802542, now seen corresponding path program 1 times [2024-06-14 11:39:19,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:19,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314200820] [2024-06-14 11:39:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:19,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:19,386 INFO 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 11:39:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:19,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314200820] [2024-06-14 11:39:19,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314200820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:19,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:19,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:19,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262035665] [2024-06-14 11:39:19,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:19,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:19,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:19,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:19,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:39:19,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 608 transitions, 8262 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:19,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:19,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:39:19,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:21,252 INFO L124 PetriNetUnfolderBase]: 3942/6681 cut-off events. [2024-06-14 11:39:21,252 INFO L125 PetriNetUnfolderBase]: For 678478/678484 co-relation queries the response was YES. [2024-06-14 11:39:21,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 6681 events. 3942/6681 cut-off events. For 678478/678484 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46844 event pairs, 739 based on Foata normal form. 2/6676 useless extension candidates. Maximal degree in co-relation 46738. Up to 5916 conditions per place. [2024-06-14 11:39:21,396 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 551 selfloop transitions, 82 changer transitions 0/640 dead transitions. [2024-06-14 11:39:21,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 640 transitions, 9988 flow [2024-06-14 11:39:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:39:21,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 11:39:21,397 INFO L175 Difference]: Start difference. First operand has 448 places, 608 transitions, 8262 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:39:21,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 640 transitions, 9988 flow [2024-06-14 11:39:28,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 640 transitions, 9572 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:28,438 INFO L231 Difference]: Finished difference. Result has 451 places, 614 transitions, 8202 flow [2024-06-14 11:39:28,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8202, PETRI_PLACES=451, PETRI_TRANSITIONS=614} [2024-06-14 11:39:28,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-14 11:39:28,439 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 614 transitions, 8202 flow [2024-06-14 11:39:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:28,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:28,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:28,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 11:39:28,440 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 11:39:28,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1050519324, now seen corresponding path program 2 times [2024-06-14 11:39:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805052514] [2024-06-14 11:39:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:28,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805052514] [2024-06-14 11:39:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805052514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:28,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:28,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277882907] [2024-06-14 11:39:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:28,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:39:28,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 614 transitions, 8202 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:28,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:28,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:39:28,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:30,739 INFO L124 PetriNetUnfolderBase]: 3976/6729 cut-off events. [2024-06-14 11:39:30,739 INFO L125 PetriNetUnfolderBase]: For 715967/715973 co-relation queries the response was YES. [2024-06-14 11:39:30,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47487 conditions, 6729 events. 3976/6729 cut-off events. For 715967/715973 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 47286 event pairs, 742 based on Foata normal form. 6/6725 useless extension candidates. Maximal degree in co-relation 47280. Up to 5966 conditions per place. [2024-06-14 11:39:30,861 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 558 selfloop transitions, 78 changer transitions 0/643 dead transitions. [2024-06-14 11:39:30,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 643 transitions, 9940 flow [2024-06-14 11:39:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:39:30,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 11:39:30,862 INFO L175 Difference]: Start difference. First operand has 451 places, 614 transitions, 8202 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:39:30,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 643 transitions, 9940 flow [2024-06-14 11:39:37,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 643 transitions, 9740 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:37,711 INFO L231 Difference]: Finished difference. Result has 456 places, 620 transitions, 8366 flow [2024-06-14 11:39:37,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8006, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8366, PETRI_PLACES=456, PETRI_TRANSITIONS=620} [2024-06-14 11:39:37,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-14 11:39:37,712 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 620 transitions, 8366 flow [2024-06-14 11:39:37,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:37,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:37,712 INFO 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 11:39:37,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 11:39:37,713 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 11:39:37,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash 692638300, now seen corresponding path program 3 times [2024-06-14 11:39:37,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:37,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188625657] [2024-06-14 11:39:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:37,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:37,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188625657] [2024-06-14 11:39:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188625657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:37,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:37,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588571274] [2024-06-14 11:39:37,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:37,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:37,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:39:37,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 620 transitions, 8366 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:37,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:37,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:39:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:39,608 INFO L124 PetriNetUnfolderBase]: 3984/6748 cut-off events. [2024-06-14 11:39:39,608 INFO L125 PetriNetUnfolderBase]: For 705407/705413 co-relation queries the response was YES. [2024-06-14 11:39:39,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47671 conditions, 6748 events. 3984/6748 cut-off events. For 705407/705413 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47470 event pairs, 751 based on Foata normal form. 6/6746 useless extension candidates. Maximal degree in co-relation 47461. Up to 6020 conditions per place. [2024-06-14 11:39:39,751 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 560 selfloop transitions, 73 changer transitions 0/640 dead transitions. [2024-06-14 11:39:39,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 640 transitions, 9746 flow [2024-06-14 11:39:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:39:39,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 11:39:39,753 INFO L175 Difference]: Start difference. First operand has 456 places, 620 transitions, 8366 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:39:39,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 640 transitions, 9746 flow [2024-06-14 11:39:46,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 640 transitions, 9518 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:46,679 INFO L231 Difference]: Finished difference. Result has 460 places, 622 transitions, 8363 flow [2024-06-14 11:39:46,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8170, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8363, PETRI_PLACES=460, PETRI_TRANSITIONS=622} [2024-06-14 11:39:46,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 11:39:46,680 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 622 transitions, 8363 flow [2024-06-14 11:39:46,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:46,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:46,680 INFO 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 11:39:46,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 11:39:46,680 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 11:39:46,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash 734874124, now seen corresponding path program 4 times [2024-06-14 11:39:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:46,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504831305] [2024-06-14 11:39:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:46,813 INFO 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 11:39:46,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504831305] [2024-06-14 11:39:46,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504831305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:46,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:46,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:46,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153069828] [2024-06-14 11:39:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:46,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:46,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:46,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:46,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:46,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:39:46,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 622 transitions, 8363 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:46,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:46,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:39:46,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:48,900 INFO L124 PetriNetUnfolderBase]: 3992/6764 cut-off events. [2024-06-14 11:39:48,901 INFO L125 PetriNetUnfolderBase]: For 713499/713505 co-relation queries the response was YES. [2024-06-14 11:39:49,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 6764 events. 3992/6764 cut-off events. For 713499/713505 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 47551 event pairs, 750 based on Foata normal form. 2/6759 useless extension candidates. Maximal degree in co-relation 47517. Up to 6032 conditions per place. [2024-06-14 11:39:49,047 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 561 selfloop transitions, 77 changer transitions 0/645 dead transitions. [2024-06-14 11:39:49,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 645 transitions, 9729 flow [2024-06-14 11:39:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:39:49,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 11:39:49,048 INFO L175 Difference]: Start difference. First operand has 460 places, 622 transitions, 8363 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:39:49,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 645 transitions, 9729 flow [2024-06-14 11:39:57,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 645 transitions, 9558 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:57,497 INFO L231 Difference]: Finished difference. Result has 462 places, 624 transitions, 8393 flow [2024-06-14 11:39:57,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8393, PETRI_PLACES=462, PETRI_TRANSITIONS=624} [2024-06-14 11:39:57,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-14 11:39:57,498 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 624 transitions, 8393 flow [2024-06-14 11:39:57,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:57,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:57,498 INFO 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 11:39:57,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 11:39:57,498 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 11:39:57,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1768099474, now seen corresponding path program 5 times [2024-06-14 11:39:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524092361] [2024-06-14 11:39:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:57,651 INFO 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 11:39:57,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:57,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524092361] [2024-06-14 11:39:57,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524092361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:57,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:57,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:57,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682826838] [2024-06-14 11:39:57,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:57,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:57,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:39:57,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 624 transitions, 8393 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:57,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:57,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:39:57,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:59,710 INFO L124 PetriNetUnfolderBase]: 4000/6778 cut-off events. [2024-06-14 11:39:59,710 INFO L125 PetriNetUnfolderBase]: For 725039/725045 co-relation queries the response was YES. [2024-06-14 11:39:59,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47907 conditions, 6778 events. 4000/6778 cut-off events. For 725039/725045 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47712 event pairs, 735 based on Foata normal form. 6/6779 useless extension candidates. Maximal degree in co-relation 47694. Up to 6122 conditions per place. [2024-06-14 11:39:59,817 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 599 selfloop transitions, 38 changer transitions 0/644 dead transitions. [2024-06-14 11:39:59,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 644 transitions, 9753 flow [2024-06-14 11:39:59,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:39:59,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 11:39:59,818 INFO L175 Difference]: Start difference. First operand has 462 places, 624 transitions, 8393 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:39:59,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 644 transitions, 9753 flow [2024-06-14 11:40:06,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 644 transitions, 9574 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:06,153 INFO L231 Difference]: Finished difference. Result has 464 places, 626 transitions, 8341 flow [2024-06-14 11:40:06,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8214, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8341, PETRI_PLACES=464, PETRI_TRANSITIONS=626} [2024-06-14 11:40:06,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-14 11:40:06,154 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 626 transitions, 8341 flow [2024-06-14 11:40:06,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:06,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:06,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 11:40:06,155 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:06,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash 359467242, now seen corresponding path program 6 times [2024-06-14 11:40:06,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:06,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696882030] [2024-06-14 11:40:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:06,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:06,300 INFO 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 11:40:06,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:06,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696882030] [2024-06-14 11:40:06,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696882030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:06,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:06,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497045581] [2024-06-14 11:40:06,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:06,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:06,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:06,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:06,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 626 transitions, 8341 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:06,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:06,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:06,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:08,024 INFO L124 PetriNetUnfolderBase]: 4008/6806 cut-off events. [2024-06-14 11:40:08,025 INFO L125 PetriNetUnfolderBase]: For 738372/738378 co-relation queries the response was YES. [2024-06-14 11:40:08,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48037 conditions, 6806 events. 4008/6806 cut-off events. For 738372/738378 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47927 event pairs, 629 based on Foata normal form. 6/6804 useless extension candidates. Maximal degree in co-relation 47823. Up to 5799 conditions per place. [2024-06-14 11:40:08,123 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 539 selfloop transitions, 110 changer transitions 0/656 dead transitions. [2024-06-14 11:40:08,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 656 transitions, 10342 flow [2024-06-14 11:40:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:40:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:40:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 11:40:08,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:40:08,124 INFO L175 Difference]: Start difference. First operand has 464 places, 626 transitions, 8341 flow. Second operand 7 states and 168 transitions. [2024-06-14 11:40:08,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 656 transitions, 10342 flow [2024-06-14 11:40:12,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 656 transitions, 10253 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:40:12,983 INFO L231 Difference]: Finished difference. Result has 468 places, 631 transitions, 8669 flow [2024-06-14 11:40:12,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8252, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8669, PETRI_PLACES=468, PETRI_TRANSITIONS=631} [2024-06-14 11:40:12,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-14 11:40:12,985 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 631 transitions, 8669 flow [2024-06-14 11:40:12,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:12,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:12,985 INFO 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 11:40:12,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 11:40:12,985 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:12,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash 371847402, now seen corresponding path program 7 times [2024-06-14 11:40:12,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:12,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134582756] [2024-06-14 11:40:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:12,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:13,119 INFO 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 11:40:13,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:13,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134582756] [2024-06-14 11:40:13,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134582756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:13,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:13,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:13,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468013820] [2024-06-14 11:40:13,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:13,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:13,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:13,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:13,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:13,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 631 transitions, 8669 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:13,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:13,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:14,891 INFO L124 PetriNetUnfolderBase]: 4016/6817 cut-off events. [2024-06-14 11:40:14,891 INFO L125 PetriNetUnfolderBase]: For 753399/753405 co-relation queries the response was YES. [2024-06-14 11:40:14,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48703 conditions, 6817 events. 4016/6817 cut-off events. For 753399/753405 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 48001 event pairs, 632 based on Foata normal form. 6/6815 useless extension candidates. Maximal degree in co-relation 48487. Up to 5807 conditions per place. [2024-06-14 11:40:14,992 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 536 selfloop transitions, 111 changer transitions 0/654 dead transitions. [2024-06-14 11:40:14,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 654 transitions, 10323 flow [2024-06-14 11:40:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:40:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:40:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:40:14,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-14 11:40:14,993 INFO L175 Difference]: Start difference. First operand has 468 places, 631 transitions, 8669 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:40:14,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 654 transitions, 10323 flow [2024-06-14 11:40:20,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 654 transitions, 9902 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:20,138 INFO L231 Difference]: Finished difference. Result has 470 places, 633 transitions, 8549 flow [2024-06-14 11:40:20,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8549, PETRI_PLACES=470, PETRI_TRANSITIONS=633} [2024-06-14 11:40:20,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-14 11:40:20,139 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 633 transitions, 8549 flow [2024-06-14 11:40:20,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:20,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:20,139 INFO 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 11:40:20,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 11:40:20,140 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:20,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1187104534, now seen corresponding path program 8 times [2024-06-14 11:40:20,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:20,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067215758] [2024-06-14 11:40:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:20,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:20,263 INFO 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 11:40:20,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067215758] [2024-06-14 11:40:20,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067215758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:20,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:20,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:20,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231450209] [2024-06-14 11:40:20,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:20,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:20,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:20,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:20,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 633 transitions, 8549 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:20,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:20,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:20,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:21,948 INFO L124 PetriNetUnfolderBase]: 4024/6824 cut-off events. [2024-06-14 11:40:21,948 INFO L125 PetriNetUnfolderBase]: For 760632/760638 co-relation queries the response was YES. [2024-06-14 11:40:22,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48362 conditions, 6824 events. 4024/6824 cut-off events. For 760632/760638 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 48145 event pairs, 755 based on Foata normal form. 6/6822 useless extension candidates. Maximal degree in co-relation 48146. Up to 6080 conditions per place. [2024-06-14 11:40:22,058 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 571 selfloop transitions, 72 changer transitions 0/650 dead transitions. [2024-06-14 11:40:22,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 650 transitions, 9917 flow [2024-06-14 11:40:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:40:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:40:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 11:40:22,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-14 11:40:22,059 INFO L175 Difference]: Start difference. First operand has 470 places, 633 transitions, 8549 flow. Second operand 7 states and 158 transitions. [2024-06-14 11:40:22,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 650 transitions, 9917 flow [2024-06-14 11:40:27,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 650 transitions, 9717 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:40:27,597 INFO L231 Difference]: Finished difference. Result has 473 places, 635 transitions, 8548 flow [2024-06-14 11:40:27,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8351, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8548, PETRI_PLACES=473, PETRI_TRANSITIONS=635} [2024-06-14 11:40:27,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-14 11:40:27,597 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 635 transitions, 8548 flow [2024-06-14 11:40:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:27,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:27,598 INFO 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 11:40:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 11:40:27,598 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:27,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1177581334, now seen corresponding path program 9 times [2024-06-14 11:40:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:27,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502708558] [2024-06-14 11:40:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:27,711 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 11:40:27,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:27,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502708558] [2024-06-14 11:40:27,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502708558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:27,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:27,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:27,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783029527] [2024-06-14 11:40:27,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:27,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:27,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:27,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 635 transitions, 8548 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:27,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:27,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:27,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:29,485 INFO L124 PetriNetUnfolderBase]: 4032/6836 cut-off events. [2024-06-14 11:40:29,486 INFO L125 PetriNetUnfolderBase]: For 772479/772485 co-relation queries the response was YES. [2024-06-14 11:40:29,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48336 conditions, 6836 events. 4032/6836 cut-off events. For 772479/772485 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48299 event pairs, 751 based on Foata normal form. 6/6830 useless extension candidates. Maximal degree in co-relation 48119. Up to 6060 conditions per place. [2024-06-14 11:40:29,591 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 566 selfloop transitions, 80 changer transitions 0/653 dead transitions. [2024-06-14 11:40:29,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 653 transitions, 9918 flow [2024-06-14 11:40:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:40:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:40:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 11:40:29,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-06-14 11:40:29,593 INFO L175 Difference]: Start difference. First operand has 473 places, 635 transitions, 8548 flow. Second operand 7 states and 159 transitions. [2024-06-14 11:40:29,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 653 transitions, 9918 flow [2024-06-14 11:40:35,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 653 transitions, 9745 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:35,466 INFO L231 Difference]: Finished difference. Result has 475 places, 637 transitions, 8584 flow [2024-06-14 11:40:35,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8584, PETRI_PLACES=475, PETRI_TRANSITIONS=637} [2024-06-14 11:40:35,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 11:40:35,480 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 637 transitions, 8584 flow [2024-06-14 11:40:35,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:35,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:35,480 INFO 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 11:40:35,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 11:40:35,481 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:35,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -371596596, now seen corresponding path program 10 times [2024-06-14 11:40:35,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:35,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231661216] [2024-06-14 11:40:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:35,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:35,596 INFO 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 11:40:35,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:35,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231661216] [2024-06-14 11:40:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231661216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:35,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:35,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:35,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301991300] [2024-06-14 11:40:35,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:35,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:35,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:35,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:35,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:35,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 637 transitions, 8584 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:35,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:35,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:35,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:37,302 INFO L124 PetriNetUnfolderBase]: 4022/6827 cut-off events. [2024-06-14 11:40:37,302 INFO L125 PetriNetUnfolderBase]: For 768263/768269 co-relation queries the response was YES. [2024-06-14 11:40:37,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47843 conditions, 6827 events. 4022/6827 cut-off events. For 768263/768269 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48203 event pairs, 732 based on Foata normal form. 8/6830 useless extension candidates. Maximal degree in co-relation 47625. Up to 6063 conditions per place. [2024-06-14 11:40:37,407 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 585 selfloop transitions, 76 changer transitions 0/668 dead transitions. [2024-06-14 11:40:37,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 668 transitions, 9984 flow [2024-06-14 11:40:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 11:40:37,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 11:40:37,408 INFO L175 Difference]: Start difference. First operand has 475 places, 637 transitions, 8584 flow. Second operand 8 states and 195 transitions. [2024-06-14 11:40:37,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 668 transitions, 9984 flow [2024-06-14 11:40:42,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 668 transitions, 9759 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:42,304 INFO L231 Difference]: Finished difference. Result has 478 places, 637 transitions, 8525 flow [2024-06-14 11:40:42,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8359, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8525, PETRI_PLACES=478, PETRI_TRANSITIONS=637} [2024-06-14 11:40:42,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-14 11:40:42,304 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 637 transitions, 8525 flow [2024-06-14 11:40:42,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:42,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:42,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:42,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 11:40:42,305 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:42,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:42,305 INFO L85 PathProgramCache]: Analyzing trace with hash -105899316, now seen corresponding path program 11 times [2024-06-14 11:40:42,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:42,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802309771] [2024-06-14 11:40:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:42,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:42,444 INFO 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 11:40:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802309771] [2024-06-14 11:40:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802309771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203404454] [2024-06-14 11:40:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:42,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:42,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 637 transitions, 8525 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:42,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:42,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:42,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:44,287 INFO L124 PetriNetUnfolderBase]: 4012/6807 cut-off events. [2024-06-14 11:40:44,287 INFO L125 PetriNetUnfolderBase]: For 750893/750899 co-relation queries the response was YES. [2024-06-14 11:40:44,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47240 conditions, 6807 events. 4012/6807 cut-off events. For 750893/750899 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48092 event pairs, 746 based on Foata normal form. 8/6807 useless extension candidates. Maximal degree in co-relation 47021. Up to 6055 conditions per place. [2024-06-14 11:40:44,388 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 66 changer transitions 0/657 dead transitions. [2024-06-14 11:40:44,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 657 transitions, 9875 flow [2024-06-14 11:40:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:40:44,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:40:44,390 INFO L175 Difference]: Start difference. First operand has 478 places, 637 transitions, 8525 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:40:44,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 657 transitions, 9875 flow [2024-06-14 11:40:49,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 657 transitions, 9673 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 11:40:49,074 INFO L231 Difference]: Finished difference. Result has 476 places, 637 transitions, 8466 flow [2024-06-14 11:40:49,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8323, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8466, PETRI_PLACES=476, PETRI_TRANSITIONS=637} [2024-06-14 11:40:49,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-14 11:40:49,075 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 637 transitions, 8466 flow [2024-06-14 11:40:49,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:49,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:49,076 INFO 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 11:40:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 11:40:49,076 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:49,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash -105572886, now seen corresponding path program 12 times [2024-06-14 11:40:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734363168] [2024-06-14 11:40:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:49,197 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 11:40:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734363168] [2024-06-14 11:40:49,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734363168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:49,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:49,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:40:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443402672] [2024-06-14 11:40:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:40:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:40:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:40:49,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:49,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 637 transitions, 8466 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:49,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:49,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:49,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:50,902 INFO L124 PetriNetUnfolderBase]: 4002/6808 cut-off events. [2024-06-14 11:40:50,902 INFO L125 PetriNetUnfolderBase]: For 709464/709470 co-relation queries the response was YES. [2024-06-14 11:40:50,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46476 conditions, 6808 events. 4002/6808 cut-off events. For 709464/709470 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48147 event pairs, 631 based on Foata normal form. 8/6808 useless extension candidates. Maximal degree in co-relation 46257. Up to 5900 conditions per place. [2024-06-14 11:40:51,006 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 563 selfloop transitions, 88 changer transitions 0/658 dead transitions. [2024-06-14 11:40:51,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 658 transitions, 9820 flow [2024-06-14 11:40:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:40:51,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 11:40:51,008 INFO L175 Difference]: Start difference. First operand has 476 places, 637 transitions, 8466 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:40:51,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 658 transitions, 9820 flow [2024-06-14 11:40:55,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 658 transitions, 9634 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:55,921 INFO L231 Difference]: Finished difference. Result has 477 places, 637 transitions, 8467 flow [2024-06-14 11:40:55,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8467, PETRI_PLACES=477, PETRI_TRANSITIONS=637} [2024-06-14 11:40:55,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-14 11:40:55,922 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 637 transitions, 8467 flow [2024-06-14 11:40:55,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:55,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:55,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:55,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 11:40:55,922 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:55,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 71416902, now seen corresponding path program 3 times [2024-06-14 11:40:55,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:55,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313999343] [2024-06-14 11:40:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:55,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:56,048 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 11:40:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:56,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313999343] [2024-06-14 11:40:56,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313999343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:56,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:56,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:56,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640364453] [2024-06-14 11:40:56,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:56,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:56,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:56,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:56,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:40:56,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 637 transitions, 8467 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:56,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:56,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:40:56,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:57,729 INFO L124 PetriNetUnfolderBase]: 4010/6809 cut-off events. [2024-06-14 11:40:57,729 INFO L125 PetriNetUnfolderBase]: For 705756/705756 co-relation queries the response was YES. [2024-06-14 11:40:57,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46784 conditions, 6809 events. 4010/6809 cut-off events. For 705756/705756 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 48122 event pairs, 748 based on Foata normal form. 2/6804 useless extension candidates. Maximal degree in co-relation 46564. Up to 6088 conditions per place. [2024-06-14 11:40:57,842 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 581 selfloop transitions, 67 changer transitions 0/655 dead transitions. [2024-06-14 11:40:57,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 655 transitions, 9881 flow [2024-06-14 11:40:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 11:40:57,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-14 11:40:57,843 INFO L175 Difference]: Start difference. First operand has 477 places, 637 transitions, 8467 flow. Second operand 8 states and 179 transitions. [2024-06-14 11:40:57,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 655 transitions, 9881 flow [2024-06-14 11:41:02,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 655 transitions, 9637 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:41:02,418 INFO L231 Difference]: Finished difference. Result has 478 places, 639 transitions, 8446 flow [2024-06-14 11:41:02,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8223, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8446, PETRI_PLACES=478, PETRI_TRANSITIONS=639} [2024-06-14 11:41:02,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-14 11:41:02,419 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 639 transitions, 8446 flow [2024-06-14 11:41:02,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:02,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:02,419 INFO 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 11:41:02,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 11:41:02,420 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:02,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash 138304140, now seen corresponding path program 4 times [2024-06-14 11:41:02,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:02,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321618790] [2024-06-14 11:41:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:02,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:02,591 INFO 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 11:41:02,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321618790] [2024-06-14 11:41:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321618790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:02,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:02,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889933328] [2024-06-14 11:41:02,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:02,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:02,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 639 transitions, 8446 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:02,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:02,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:02,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:04,350 INFO L124 PetriNetUnfolderBase]: 4018/6813 cut-off events. [2024-06-14 11:41:04,350 INFO L125 PetriNetUnfolderBase]: For 706086/706086 co-relation queries the response was YES. [2024-06-14 11:41:04,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46802 conditions, 6813 events. 4018/6813 cut-off events. For 706086/706086 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 48068 event pairs, 750 based on Foata normal form. 2/6808 useless extension candidates. Maximal degree in co-relation 46582. Up to 6080 conditions per place. [2024-06-14 11:41:04,467 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 580 selfloop transitions, 72 changer transitions 0/659 dead transitions. [2024-06-14 11:41:04,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 659 transitions, 9876 flow [2024-06-14 11:41:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:41:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:41:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 11:41:04,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 11:41:04,474 INFO L175 Difference]: Start difference. First operand has 478 places, 639 transitions, 8446 flow. Second operand 9 states and 198 transitions. [2024-06-14 11:41:04,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 659 transitions, 9876 flow [2024-06-14 11:41:09,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 659 transitions, 9669 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:09,324 INFO L231 Difference]: Finished difference. Result has 481 places, 641 transitions, 8476 flow [2024-06-14 11:41:09,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8239, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8476, PETRI_PLACES=481, PETRI_TRANSITIONS=641} [2024-06-14 11:41:09,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-14 11:41:09,324 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 641 transitions, 8476 flow [2024-06-14 11:41:09,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:09,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:09,325 INFO 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 11:41:09,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 11:41:09,325 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:09,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:09,325 INFO L85 PathProgramCache]: Analyzing trace with hash 721390580, now seen corresponding path program 5 times [2024-06-14 11:41:09,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:09,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061379175] [2024-06-14 11:41:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:09,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:09,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:09,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061379175] [2024-06-14 11:41:09,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061379175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:09,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:09,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:09,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54217709] [2024-06-14 11:41:09,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:09,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:09,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:09,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:09,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 641 transitions, 8476 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:09,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:09,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:09,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:11,164 INFO L124 PetriNetUnfolderBase]: 4026/6838 cut-off events. [2024-06-14 11:41:11,164 INFO L125 PetriNetUnfolderBase]: For 718601/718607 co-relation queries the response was YES. [2024-06-14 11:41:11,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47035 conditions, 6838 events. 4026/6838 cut-off events. For 718601/718607 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 48290 event pairs, 750 based on Foata normal form. 6/6839 useless extension candidates. Maximal degree in co-relation 46814. Up to 6106 conditions per place. [2024-06-14 11:41:11,288 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 70 changer transitions 0/661 dead transitions. [2024-06-14 11:41:11,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 661 transitions, 9916 flow [2024-06-14 11:41:11,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:41:11,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 11:41:11,290 INFO L175 Difference]: Start difference. First operand has 481 places, 641 transitions, 8476 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:41:11,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 661 transitions, 9916 flow [2024-06-14 11:41:16,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 661 transitions, 9695 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 11:41:16,414 INFO L231 Difference]: Finished difference. Result has 481 places, 643 transitions, 8495 flow [2024-06-14 11:41:16,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8255, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8495, PETRI_PLACES=481, PETRI_TRANSITIONS=643} [2024-06-14 11:41:16,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-14 11:41:16,415 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 643 transitions, 8495 flow [2024-06-14 11:41:16,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:16,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:16,415 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, 1] [2024-06-14 11:41:16,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 11:41:16,416 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:16,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:16,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2126275932, now seen corresponding path program 6 times [2024-06-14 11:41:16,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:16,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840552415] [2024-06-14 11:41:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:16,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:16,550 INFO 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 11:41:16,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:16,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840552415] [2024-06-14 11:41:16,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840552415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:16,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:16,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:16,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399646255] [2024-06-14 11:41:16,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:16,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:16,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:16,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:16,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:16,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:16,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 643 transitions, 8495 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:16,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:16,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:16,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:18,287 INFO L124 PetriNetUnfolderBase]: 4034/6841 cut-off events. [2024-06-14 11:41:18,287 INFO L125 PetriNetUnfolderBase]: For 729409/729409 co-relation queries the response was YES. [2024-06-14 11:41:18,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47221 conditions, 6841 events. 4034/6841 cut-off events. For 729409/729409 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 48348 event pairs, 757 based on Foata normal form. 2/6836 useless extension candidates. Maximal degree in co-relation 46999. Up to 6118 conditions per place. [2024-06-14 11:41:18,589 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 583 selfloop transitions, 70 changer transitions 0/660 dead transitions. [2024-06-14 11:41:18,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 660 transitions, 9929 flow [2024-06-14 11:41:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 11:41:18,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-14 11:41:18,590 INFO L175 Difference]: Start difference. First operand has 481 places, 643 transitions, 8495 flow. Second operand 7 states and 160 transitions. [2024-06-14 11:41:18,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 660 transitions, 9929 flow [2024-06-14 11:41:23,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 660 transitions, 9715 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 11:41:23,440 INFO L231 Difference]: Finished difference. Result has 483 places, 645 transitions, 8525 flow [2024-06-14 11:41:23,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8525, PETRI_PLACES=483, PETRI_TRANSITIONS=645} [2024-06-14 11:41:23,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-14 11:41:23,441 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 645 transitions, 8525 flow [2024-06-14 11:41:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:23,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:23,441 INFO 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 11:41:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 11:41:23,443 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:23,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1735439900, now seen corresponding path program 7 times [2024-06-14 11:41:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:23,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137857108] [2024-06-14 11:41:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:23,578 INFO 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 11:41:23,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:23,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137857108] [2024-06-14 11:41:23,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137857108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:23,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:23,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:23,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116683904] [2024-06-14 11:41:23,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:23,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:23,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:23,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:23,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 645 transitions, 8525 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:23,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:23,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:23,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:25,287 INFO L124 PetriNetUnfolderBase]: 4042/6858 cut-off events. [2024-06-14 11:41:25,287 INFO L125 PetriNetUnfolderBase]: For 742150/742156 co-relation queries the response was YES. [2024-06-14 11:41:25,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47437 conditions, 6858 events. 4042/6858 cut-off events. For 742150/742156 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48448 event pairs, 742 based on Foata normal form. 6/6859 useless extension candidates. Maximal degree in co-relation 47214. Up to 6090 conditions per place. [2024-06-14 11:41:25,390 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 580 selfloop transitions, 80 changer transitions 0/667 dead transitions. [2024-06-14 11:41:25,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 667 transitions, 9989 flow [2024-06-14 11:41:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:41:25,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 11:41:25,393 INFO L175 Difference]: Start difference. First operand has 483 places, 645 transitions, 8525 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:41:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 667 transitions, 9989 flow [2024-06-14 11:41:30,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 667 transitions, 9761 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 11:41:30,403 INFO L231 Difference]: Finished difference. Result has 486 places, 647 transitions, 8565 flow [2024-06-14 11:41:30,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8301, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8565, PETRI_PLACES=486, PETRI_TRANSITIONS=647} [2024-06-14 11:41:30,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-14 11:41:30,405 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 647 transitions, 8565 flow [2024-06-14 11:41:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:30,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:30,405 INFO 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 11:41:30,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 11:41:30,405 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:30,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2111038812, now seen corresponding path program 8 times [2024-06-14 11:41:30,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:30,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943004541] [2024-06-14 11:41:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:30,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:30,513 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 11:41:30,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:30,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943004541] [2024-06-14 11:41:30,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943004541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:30,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:30,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:30,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431133770] [2024-06-14 11:41:30,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:30,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:30,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 647 transitions, 8565 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:30,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:30,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:30,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:32,261 INFO L124 PetriNetUnfolderBase]: 4037/6838 cut-off events. [2024-06-14 11:41:32,262 INFO L125 PetriNetUnfolderBase]: For 724903/724903 co-relation queries the response was YES. [2024-06-14 11:41:32,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46964 conditions, 6838 events. 4037/6838 cut-off events. For 724903/724903 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48274 event pairs, 738 based on Foata normal form. 2/6833 useless extension candidates. Maximal degree in co-relation 46740. Up to 6083 conditions per place. [2024-06-14 11:41:32,371 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 579 selfloop transitions, 80 changer transitions 0/666 dead transitions. [2024-06-14 11:41:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 666 transitions, 10019 flow [2024-06-14 11:41:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 11:41:32,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-14 11:41:32,372 INFO L175 Difference]: Start difference. First operand has 486 places, 647 transitions, 8565 flow. Second operand 8 states and 179 transitions. [2024-06-14 11:41:32,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 666 transitions, 10019 flow [2024-06-14 11:41:36,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 666 transitions, 9781 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:36,975 INFO L231 Difference]: Finished difference. Result has 488 places, 649 transitions, 8595 flow [2024-06-14 11:41:36,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8595, PETRI_PLACES=488, PETRI_TRANSITIONS=649} [2024-06-14 11:41:37,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-14 11:41:37,004 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 649 transitions, 8595 flow [2024-06-14 11:41:37,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:37,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:37,005 INFO 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 11:41:37,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 11:41:37,005 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:37,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 760878703, now seen corresponding path program 1 times [2024-06-14 11:41:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:37,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307905060] [2024-06-14 11:41:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:37,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:37,197 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 11:41:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307905060] [2024-06-14 11:41:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307905060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:37,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:37,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:41:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993024708] [2024-06-14 11:41:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:37,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:41:37,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:37,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:41:37,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:41:37,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:37,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 649 transitions, 8595 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:37,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:37,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:37,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:39,043 INFO L124 PetriNetUnfolderBase]: 4058/6890 cut-off events. [2024-06-14 11:41:39,043 INFO L125 PetriNetUnfolderBase]: For 742832/742838 co-relation queries the response was YES. [2024-06-14 11:41:39,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47386 conditions, 6890 events. 4058/6890 cut-off events. For 742832/742838 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 48774 event pairs, 809 based on Foata normal form. 1/6884 useless extension candidates. Maximal degree in co-relation 47161. Up to 5509 conditions per place. [2024-06-14 11:41:39,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 304 changer transitions 0/695 dead transitions. [2024-06-14 11:41:39,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 695 transitions, 10939 flow [2024-06-14 11:41:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:41:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:41:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 11:41:39,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-14 11:41:39,157 INFO L175 Difference]: Start difference. First operand has 488 places, 649 transitions, 8595 flow. Second operand 9 states and 224 transitions. [2024-06-14 11:41:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 695 transitions, 10939 flow [2024-06-14 11:41:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 695 transitions, 10685 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:44,663 INFO L231 Difference]: Finished difference. Result has 491 places, 661 transitions, 9095 flow [2024-06-14 11:41:44,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8347, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9095, PETRI_PLACES=491, PETRI_TRANSITIONS=661} [2024-06-14 11:41:44,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-14 11:41:44,664 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 661 transitions, 9095 flow [2024-06-14 11:41:44,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:44,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:44,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 11:41:44,665 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:44,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1140709841, now seen corresponding path program 2 times [2024-06-14 11:41:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:44,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766149069] [2024-06-14 11:41:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:44,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:44,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766149069] [2024-06-14 11:41:44,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766149069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:44,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:44,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:41:44,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018569841] [2024-06-14 11:41:44,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:44,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:41:44,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:41:44,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:41:44,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:44,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 661 transitions, 9095 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:44,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:44,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:44,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:46,702 INFO L124 PetriNetUnfolderBase]: 4071/6910 cut-off events. [2024-06-14 11:41:46,702 INFO L125 PetriNetUnfolderBase]: For 751486/751492 co-relation queries the response was YES. [2024-06-14 11:41:46,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48635 conditions, 6910 events. 4071/6910 cut-off events. For 751486/751492 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 48978 event pairs, 771 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 48409. Up to 5991 conditions per place. [2024-06-14 11:41:46,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 511 selfloop transitions, 178 changer transitions 0/696 dead transitions. [2024-06-14 11:41:46,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 696 transitions, 10873 flow [2024-06-14 11:41:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:41:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:41:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 11:41:46,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:41:46,823 INFO L175 Difference]: Start difference. First operand has 491 places, 661 transitions, 9095 flow. Second operand 9 states and 216 transitions. [2024-06-14 11:41:46,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 696 transitions, 10873 flow [2024-06-14 11:41:53,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 696 transitions, 10625 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-14 11:41:53,027 INFO L231 Difference]: Finished difference. Result has 497 places, 667 transitions, 9291 flow [2024-06-14 11:41:53,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8879, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9291, PETRI_PLACES=497, PETRI_TRANSITIONS=667} [2024-06-14 11:41:53,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-14 11:41:53,028 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 667 transitions, 9291 flow [2024-06-14 11:41:53,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:53,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:53,028 INFO 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 11:41:53,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 11:41:53,029 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:53,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -760499375, now seen corresponding path program 3 times [2024-06-14 11:41:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935885561] [2024-06-14 11:41:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:53,146 INFO 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 11:41:53,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:53,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935885561] [2024-06-14 11:41:53,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935885561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:53,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:53,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:41:53,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26466591] [2024-06-14 11:41:53,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:53,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:41:53,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:41:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:41:53,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:41:53,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 667 transitions, 9291 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:53,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:53,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:41:53,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:55,432 INFO L124 PetriNetUnfolderBase]: 4068/6910 cut-off events. [2024-06-14 11:41:55,432 INFO L125 PetriNetUnfolderBase]: For 756665/756671 co-relation queries the response was YES. [2024-06-14 11:41:55,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48899 conditions, 6910 events. 4068/6910 cut-off events. For 756665/756671 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49081 event pairs, 763 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 48670. Up to 5988 conditions per place. [2024-06-14 11:41:55,559 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 511 selfloop transitions, 179 changer transitions 0/697 dead transitions. [2024-06-14 11:41:55,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 697 transitions, 10745 flow [2024-06-14 11:41:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:41:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:41:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-14 11:41:55,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-14 11:41:55,561 INFO L175 Difference]: Start difference. First operand has 497 places, 667 transitions, 9291 flow. Second operand 11 states and 249 transitions. [2024-06-14 11:41:55,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 697 transitions, 10745 flow [2024-06-14 11:42:01,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 697 transitions, 10525 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:42:01,277 INFO L231 Difference]: Finished difference. Result has 503 places, 667 transitions, 9435 flow [2024-06-14 11:42:01,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9071, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9435, PETRI_PLACES=503, PETRI_TRANSITIONS=667} [2024-06-14 11:42:01,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-14 11:42:01,277 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 667 transitions, 9435 flow [2024-06-14 11:42:01,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:01,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:01,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:01,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 11:42:01,278 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:01,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash 55399983, now seen corresponding path program 4 times [2024-06-14 11:42:01,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286432871] [2024-06-14 11:42:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:01,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:01,391 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 11:42:01,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:01,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286432871] [2024-06-14 11:42:01,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286432871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:01,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:01,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:42:01,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007530468] [2024-06-14 11:42:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:42:01,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:42:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:42:01,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:42:01,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 667 transitions, 9435 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:01,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:01,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:42:01,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:03,192 INFO L124 PetriNetUnfolderBase]: 4089/6945 cut-off events. [2024-06-14 11:42:03,192 INFO L125 PetriNetUnfolderBase]: For 784002/784008 co-relation queries the response was YES. [2024-06-14 11:42:03,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49759 conditions, 6945 events. 4089/6945 cut-off events. For 784002/784008 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 49324 event pairs, 763 based on Foata normal form. 5/6945 useless extension candidates. Maximal degree in co-relation 49528. Up to 5996 conditions per place. [2024-06-14 11:42:03,303 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 192 changer transitions 0/709 dead transitions. [2024-06-14 11:42:03,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 709 transitions, 11515 flow [2024-06-14 11:42:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:42:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:42:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2024-06-14 11:42:03,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456349206349206 [2024-06-14 11:42:03,304 INFO L175 Difference]: Start difference. First operand has 503 places, 667 transitions, 9435 flow. Second operand 12 states and 275 transitions. [2024-06-14 11:42:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 709 transitions, 11515 flow [2024-06-14 11:42:10,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 709 transitions, 11149 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:42:10,285 INFO L231 Difference]: Finished difference. Result has 506 places, 676 transitions, 9572 flow [2024-06-14 11:42:10,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9069, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9572, PETRI_PLACES=506, PETRI_TRANSITIONS=676} [2024-06-14 11:42:10,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-14 11:42:10,285 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 676 transitions, 9572 flow [2024-06-14 11:42:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:10,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:10,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:10,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 11:42:10,286 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:10,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash 62757213, now seen corresponding path program 5 times [2024-06-14 11:42:10,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:10,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702120589] [2024-06-14 11:42:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:10,409 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 11:42:10,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:10,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702120589] [2024-06-14 11:42:10,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702120589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:10,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:10,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:42:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649333359] [2024-06-14 11:42:10,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:10,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:42:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:42:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:42:10,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:42:10,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 676 transitions, 9572 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:10,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:10,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:42:10,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:12,640 INFO L124 PetriNetUnfolderBase]: 4094/6955 cut-off events. [2024-06-14 11:42:12,640 INFO L125 PetriNetUnfolderBase]: For 796685/796691 co-relation queries the response was YES. [2024-06-14 11:42:12,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49974 conditions, 6955 events. 4094/6955 cut-off events. For 796685/796691 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49470 event pairs, 780 based on Foata normal form. 5/6954 useless extension candidates. Maximal degree in co-relation 49741. Up to 6021 conditions per place. [2024-06-14 11:42:12,771 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 521 selfloop transitions, 179 changer transitions 0/707 dead transitions. [2024-06-14 11:42:12,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 707 transitions, 11332 flow [2024-06-14 11:42:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:42:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:42:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 11:42:12,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-14 11:42:12,772 INFO L175 Difference]: Start difference. First operand has 506 places, 676 transitions, 9572 flow. Second operand 11 states and 247 transitions. [2024-06-14 11:42:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 707 transitions, 11332 flow [2024-06-14 11:42:19,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 707 transitions, 10934 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 11:42:19,180 INFO L231 Difference]: Finished difference. Result has 509 places, 679 transitions, 9578 flow [2024-06-14 11:42:19,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9184, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9578, PETRI_PLACES=509, PETRI_TRANSITIONS=679} [2024-06-14 11:42:19,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-14 11:42:19,180 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 679 transitions, 9578 flow [2024-06-14 11:42:19,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:19,181 INFO 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 11:42:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 11:42:19,181 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:19,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash -337411529, now seen corresponding path program 6 times [2024-06-14 11:42:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:19,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582264372] [2024-06-14 11:42:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:19,308 INFO 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 11:42:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582264372] [2024-06-14 11:42:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582264372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:19,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:42:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127975969] [2024-06-14 11:42:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:42:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:42:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:42:19,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:42:19,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 679 transitions, 9578 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:19,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:19,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:42:19,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:21,203 INFO L124 PetriNetUnfolderBase]: 4091/6946 cut-off events. [2024-06-14 11:42:21,203 INFO L125 PetriNetUnfolderBase]: For 797433/797439 co-relation queries the response was YES. [2024-06-14 11:42:21,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49868 conditions, 6946 events. 4091/6946 cut-off events. For 797433/797439 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49322 event pairs, 771 based on Foata normal form. 5/6946 useless extension candidates. Maximal degree in co-relation 49634. Up to 5999 conditions per place. [2024-06-14 11:42:21,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 196 changer transitions 0/713 dead transitions. [2024-06-14 11:42:21,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 713 transitions, 11332 flow [2024-06-14 11:42:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:42:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:42:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-14 11:42:21,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-14 11:42:21,324 INFO L175 Difference]: Start difference. First operand has 509 places, 679 transitions, 9578 flow. Second operand 14 states and 310 transitions. [2024-06-14 11:42:21,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 713 transitions, 11332 flow [2024-06-14 11:42:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 713 transitions, 10954 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 11:42:27,991 INFO L231 Difference]: Finished difference. Result has 514 places, 679 transitions, 9598 flow [2024-06-14 11:42:27,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9200, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9598, PETRI_PLACES=514, PETRI_TRANSITIONS=679} [2024-06-14 11:42:27,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-14 11:42:27,992 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 679 transitions, 9598 flow [2024-06-14 11:42:27,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:27,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:27,992 INFO 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 11:42:27,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 11:42:27,993 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:27,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:27,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1187331703, now seen corresponding path program 7 times [2024-06-14 11:42:27,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:27,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261422353] [2024-06-14 11:42:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:28,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:28,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261422353] [2024-06-14 11:42:28,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261422353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:28,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:28,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121664716] [2024-06-14 11:42:28,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:28,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:42:28,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 679 transitions, 9598 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:28,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:28,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:42:28,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:30,114 INFO L124 PetriNetUnfolderBase]: 4104/6933 cut-off events. [2024-06-14 11:42:30,114 INFO L125 PetriNetUnfolderBase]: For 818512/818512 co-relation queries the response was YES. [2024-06-14 11:42:30,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50193 conditions, 6933 events. 4104/6933 cut-off events. For 818512/818512 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 49144 event pairs, 849 based on Foata normal form. 1/6919 useless extension candidates. Maximal degree in co-relation 49958. Up to 5563 conditions per place. [2024-06-14 11:42:30,227 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 326 changer transitions 0/709 dead transitions. [2024-06-14 11:42:30,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 709 transitions, 11922 flow [2024-06-14 11:42:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 11:42:30,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 11:42:30,229 INFO L175 Difference]: Start difference. First operand has 514 places, 679 transitions, 9598 flow. Second operand 8 states and 195 transitions. [2024-06-14 11:42:30,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 709 transitions, 11922 flow [2024-06-14 11:42:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 709 transitions, 11512 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-14 11:42:37,585 INFO L231 Difference]: Finished difference. Result has 509 places, 685 transitions, 9922 flow [2024-06-14 11:42:37,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9188, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9922, PETRI_PLACES=509, PETRI_TRANSITIONS=685} [2024-06-14 11:42:37,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-14 11:42:37,586 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 685 transitions, 9922 flow [2024-06-14 11:42:37,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:37,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:37,586 INFO 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 11:42:37,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 11:42:37,587 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:37,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1715632713, now seen corresponding path program 8 times [2024-06-14 11:42:37,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:37,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444347379] [2024-06-14 11:42:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:37,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:37,698 INFO 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 11:42:37,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444347379] [2024-06-14 11:42:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444347379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:37,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003382673] [2024-06-14 11:42:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:37,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:37,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:42:37,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 685 transitions, 9922 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:37,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:37,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:42:37,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:39,730 INFO L124 PetriNetUnfolderBase]: 4125/6972 cut-off events. [2024-06-14 11:42:39,730 INFO L125 PetriNetUnfolderBase]: For 849308/849308 co-relation queries the response was YES. [2024-06-14 11:42:39,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51083 conditions, 6972 events. 4125/6972 cut-off events. For 849308/849308 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49484 event pairs, 841 based on Foata normal form. 1/6958 useless extension candidates. Maximal degree in co-relation 50847. Up to 5587 conditions per place. [2024-06-14 11:42:39,886 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 330 changer transitions 0/715 dead transitions. [2024-06-14 11:42:39,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 715 transitions, 12312 flow [2024-06-14 11:42:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:42:39,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 11:42:39,888 INFO L175 Difference]: Start difference. First operand has 509 places, 685 transitions, 9922 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:42:39,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 715 transitions, 12312 flow [2024-06-14 11:42:48,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 715 transitions, 11716 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:48,743 INFO L231 Difference]: Finished difference. Result has 513 places, 694 transitions, 10124 flow [2024-06-14 11:42:48,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9375, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10124, PETRI_PLACES=513, PETRI_TRANSITIONS=694} [2024-06-14 11:42:48,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-14 11:42:48,745 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 694 transitions, 10124 flow [2024-06-14 11:42:48,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:48,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:48,748 INFO 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 11:42:48,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 11:42:48,749 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:48,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1715246763, now seen corresponding path program 9 times [2024-06-14 11:42:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482848657] [2024-06-14 11:42:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:48,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482848657] [2024-06-14 11:42:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482848657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:48,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:48,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:48,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344202905] [2024-06-14 11:42:48,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:48,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:48,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:42:48,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 694 transitions, 10124 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:48,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:48,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:42:48,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:50,801 INFO L124 PetriNetUnfolderBase]: 4122/6968 cut-off events. [2024-06-14 11:42:50,801 INFO L125 PetriNetUnfolderBase]: For 852881/852881 co-relation queries the response was YES. [2024-06-14 11:42:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51031 conditions, 6968 events. 4122/6968 cut-off events. For 852881/852881 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49402 event pairs, 841 based on Foata normal form. 1/6954 useless extension candidates. Maximal degree in co-relation 50794. Up to 5584 conditions per place. [2024-06-14 11:42:50,914 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 327 changer transitions 0/715 dead transitions. [2024-06-14 11:42:50,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 715 transitions, 12388 flow [2024-06-14 11:42:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:42:50,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 11:42:50,915 INFO L175 Difference]: Start difference. First operand has 513 places, 694 transitions, 10124 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:42:50,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 715 transitions, 12388 flow [2024-06-14 11:42:57,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 715 transitions, 11837 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:57,769 INFO L231 Difference]: Finished difference. Result has 517 places, 694 transitions, 10233 flow [2024-06-14 11:42:57,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9573, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10233, PETRI_PLACES=517, PETRI_TRANSITIONS=694} [2024-06-14 11:42:57,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-14 11:42:57,769 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 694 transitions, 10233 flow [2024-06-14 11:42:57,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:57,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:57,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:57,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 11:42:57,770 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:57,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash -492882551, now seen corresponding path program 10 times [2024-06-14 11:42:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:57,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985014682] [2024-06-14 11:42:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:57,893 INFO 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 11:42:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:57,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985014682] [2024-06-14 11:42:57,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985014682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:57,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:57,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:57,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634249562] [2024-06-14 11:42:57,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:57,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:57,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:57,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:42:57,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 694 transitions, 10233 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:57,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:57,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:42:57,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:59,918 INFO L124 PetriNetUnfolderBase]: 4119/6964 cut-off events. [2024-06-14 11:42:59,918 INFO L125 PetriNetUnfolderBase]: For 856804/856804 co-relation queries the response was YES. [2024-06-14 11:43:00,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51041 conditions, 6964 events. 4119/6964 cut-off events. For 856804/856804 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49450 event pairs, 841 based on Foata normal form. 1/6950 useless extension candidates. Maximal degree in co-relation 50803. Up to 5581 conditions per place. [2024-06-14 11:43:00,030 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 320 changer transitions 0/719 dead transitions. [2024-06-14 11:43:00,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 719 transitions, 12789 flow [2024-06-14 11:43:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:43:00,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:43:00,031 INFO L175 Difference]: Start difference. First operand has 517 places, 694 transitions, 10233 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:43:00,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 719 transitions, 12789 flow [2024-06-14 11:43:07,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 719 transitions, 12161 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:43:07,366 INFO L231 Difference]: Finished difference. Result has 520 places, 694 transitions, 10251 flow [2024-06-14 11:43:07,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9605, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10251, PETRI_PLACES=520, PETRI_TRANSITIONS=694} [2024-06-14 11:43:07,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-14 11:43:07,367 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 694 transitions, 10251 flow [2024-06-14 11:43:07,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:07,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:07,367 INFO 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 11:43:07,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-14 11:43:07,367 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:07,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash 279026337, now seen corresponding path program 11 times [2024-06-14 11:43:07,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:07,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912170350] [2024-06-14 11:43:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:07,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:07,578 INFO 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 11:43:07,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:07,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912170350] [2024-06-14 11:43:07,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912170350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:07,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:07,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733292172] [2024-06-14 11:43:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:07,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:07,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:07,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:07,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:07,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:43:07,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 694 transitions, 10251 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:07,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:07,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:43:07,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:09,453 INFO L124 PetriNetUnfolderBase]: 4132/6999 cut-off events. [2024-06-14 11:43:09,454 INFO L125 PetriNetUnfolderBase]: For 877485/877485 co-relation queries the response was YES. [2024-06-14 11:43:09,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51375 conditions, 6999 events. 4132/6999 cut-off events. For 877485/877485 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49758 event pairs, 782 based on Foata normal form. 1/6988 useless extension candidates. Maximal degree in co-relation 51136. Up to 6076 conditions per place. [2024-06-14 11:43:09,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 178 changer transitions 0/719 dead transitions. [2024-06-14 11:43:09,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 719 transitions, 12075 flow [2024-06-14 11:43:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:43:09,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-14 11:43:09,571 INFO L175 Difference]: Start difference. First operand has 520 places, 694 transitions, 10251 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:43:09,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 719 transitions, 12075 flow [2024-06-14 11:43:16,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 719 transitions, 11130 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 11:43:16,045 INFO L231 Difference]: Finished difference. Result has 519 places, 700 transitions, 9758 flow [2024-06-14 11:43:16,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9758, PETRI_PLACES=519, PETRI_TRANSITIONS=700} [2024-06-14 11:43:16,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-14 11:43:16,046 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 700 transitions, 9758 flow [2024-06-14 11:43:16,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:16,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:16,047 INFO 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 11:43:16,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-14 11:43:16,047 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:16,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash -489157901, now seen corresponding path program 12 times [2024-06-14 11:43:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:16,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318460002] [2024-06-14 11:43:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:16,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:16,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318460002] [2024-06-14 11:43:16,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318460002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:16,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:16,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:16,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869492225] [2024-06-14 11:43:16,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:16,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:16,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:16,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:43:16,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 700 transitions, 9758 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:16,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:16,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:43:16,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:18,084 INFO L124 PetriNetUnfolderBase]: 4129/6995 cut-off events. [2024-06-14 11:43:18,085 INFO L125 PetriNetUnfolderBase]: For 876178/876178 co-relation queries the response was YES. [2024-06-14 11:43:18,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50813 conditions, 6995 events. 4129/6995 cut-off events. For 876178/876178 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49745 event pairs, 782 based on Foata normal form. 1/6984 useless extension candidates. Maximal degree in co-relation 50574. Up to 6073 conditions per place. [2024-06-14 11:43:18,206 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 179 changer transitions 0/720 dead transitions. [2024-06-14 11:43:18,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 720 transitions, 11232 flow [2024-06-14 11:43:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:43:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:43:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-14 11:43:18,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 11:43:18,207 INFO L175 Difference]: Start difference. First operand has 519 places, 700 transitions, 9758 flow. Second operand 10 states and 220 transitions. [2024-06-14 11:43:18,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 720 transitions, 11232 flow [2024-06-14 11:43:25,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 720 transitions, 11012 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:43:25,460 INFO L231 Difference]: Finished difference. Result has 525 places, 700 transitions, 9902 flow [2024-06-14 11:43:25,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9538, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9902, PETRI_PLACES=525, PETRI_TRANSITIONS=700} [2024-06-14 11:43:25,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-14 11:43:25,461 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 700 transitions, 9902 flow [2024-06-14 11:43:25,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:25,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:25,462 INFO 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 11:43:25,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-14 11:43:25,462 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:25,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash 994691687, now seen corresponding path program 13 times [2024-06-14 11:43:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509202241] [2024-06-14 11:43:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:25,575 INFO 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 11:43:25,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:25,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509202241] [2024-06-14 11:43:25,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509202241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:25,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:25,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:25,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927216000] [2024-06-14 11:43:25,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:25,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:25,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:25,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:25,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:25,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:43:25,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 700 transitions, 9902 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:25,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:25,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:43:25,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:27,791 INFO L124 PetriNetUnfolderBase]: 4166/7052 cut-off events. [2024-06-14 11:43:27,792 INFO L125 PetriNetUnfolderBase]: For 924834/924834 co-relation queries the response was YES. [2024-06-14 11:43:27,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52053 conditions, 7052 events. 4166/7052 cut-off events. For 924834/924834 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50206 event pairs, 790 based on Foata normal form. 1/7041 useless extension candidates. Maximal degree in co-relation 51812. Up to 6070 conditions per place. [2024-06-14 11:43:27,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 211 changer transitions 0/732 dead transitions. [2024-06-14 11:43:27,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 732 transitions, 12077 flow [2024-06-14 11:43:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 11:43:27,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:43:27,907 INFO L175 Difference]: Start difference. First operand has 525 places, 700 transitions, 9902 flow. Second operand 8 states and 189 transitions. [2024-06-14 11:43:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 732 transitions, 12077 flow [2024-06-14 11:43:35,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 732 transitions, 11711 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:43:35,842 INFO L231 Difference]: Finished difference. Result has 524 places, 715 transitions, 10113 flow [2024-06-14 11:43:35,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9536, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10113, PETRI_PLACES=524, PETRI_TRANSITIONS=715} [2024-06-14 11:43:35,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-14 11:43:35,842 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 715 transitions, 10113 flow [2024-06-14 11:43:35,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:35,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:35,843 INFO 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 11:43:35,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-14 11:43:35,843 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:35,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash 994305737, now seen corresponding path program 14 times [2024-06-14 11:43:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941187503] [2024-06-14 11:43:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:35,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:35,955 INFO 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 11:43:35,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:35,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941187503] [2024-06-14 11:43:35,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941187503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:35,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:35,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086412142] [2024-06-14 11:43:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:36,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:43:36,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 715 transitions, 10113 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:36,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:36,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:43:36,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:37,848 INFO L124 PetriNetUnfolderBase]: 4163/7052 cut-off events. [2024-06-14 11:43:37,849 INFO L125 PetriNetUnfolderBase]: For 929243/929243 co-relation queries the response was YES. [2024-06-14 11:43:37,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52097 conditions, 7052 events. 4163/7052 cut-off events. For 929243/929243 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50245 event pairs, 782 based on Foata normal form. 1/7041 useless extension candidates. Maximal degree in co-relation 51855. Up to 6067 conditions per place. [2024-06-14 11:43:37,968 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 516 selfloop transitions, 209 changer transitions 0/732 dead transitions. [2024-06-14 11:43:37,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 732 transitions, 12155 flow [2024-06-14 11:43:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 11:43:37,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 11:43:37,969 INFO L175 Difference]: Start difference. First operand has 524 places, 715 transitions, 10113 flow. Second operand 8 states and 188 transitions. [2024-06-14 11:43:37,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 732 transitions, 12155 flow [2024-06-14 11:43:44,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 732 transitions, 11925 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:43:44,012 INFO L231 Difference]: Finished difference. Result has 529 places, 715 transitions, 10307 flow [2024-06-14 11:43:44,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9883, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10307, PETRI_PLACES=529, PETRI_TRANSITIONS=715} [2024-06-14 11:43:44,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 486 predicate places. [2024-06-14 11:43:44,013 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 715 transitions, 10307 flow [2024-06-14 11:43:44,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:44,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:44,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-14 11:43:44,013 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:44,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1000054067, now seen corresponding path program 15 times [2024-06-14 11:43:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897174599] [2024-06-14 11:43:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:44,121 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 11:43:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897174599] [2024-06-14 11:43:44,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897174599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:44,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:44,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340436842] [2024-06-14 11:43:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:44,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:44,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:44,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:43:44,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 715 transitions, 10307 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:44,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:44,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:43:44,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:45,957 INFO L124 PetriNetUnfolderBase]: 4160/7044 cut-off events. [2024-06-14 11:43:45,958 INFO L125 PetriNetUnfolderBase]: For 931434/931434 co-relation queries the response was YES. [2024-06-14 11:43:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52449 conditions, 7044 events. 4160/7044 cut-off events. For 931434/931434 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50178 event pairs, 790 based on Foata normal form. 1/7033 useless extension candidates. Maximal degree in co-relation 52205. Up to 6064 conditions per place. [2024-06-14 11:43:46,075 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 512 selfloop transitions, 215 changer transitions 0/734 dead transitions. [2024-06-14 11:43:46,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 734 transitions, 12361 flow [2024-06-14 11:43:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:43:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:43:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-14 11:43:46,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-14 11:43:46,077 INFO L175 Difference]: Start difference. First operand has 529 places, 715 transitions, 10307 flow. Second operand 10 states and 227 transitions. [2024-06-14 11:43:46,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 734 transitions, 12361 flow [2024-06-14 11:43:52,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 734 transitions, 11999 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:43:52,919 INFO L231 Difference]: Finished difference. Result has 535 places, 715 transitions, 10381 flow [2024-06-14 11:43:52,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9945, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10381, PETRI_PLACES=535, PETRI_TRANSITIONS=715} [2024-06-14 11:43:52,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-14 11:43:52,920 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 715 transitions, 10381 flow [2024-06-14 11:43:52,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:52,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:52,920 INFO 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 11:43:52,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-14 11:43:52,920 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:52,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash -201924611, now seen corresponding path program 16 times [2024-06-14 11:43:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:52,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971516103] [2024-06-14 11:43:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:53,028 INFO 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 11:43:53,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971516103] [2024-06-14 11:43:53,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971516103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:53,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:53,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181638055] [2024-06-14 11:43:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:53,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:43:53,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 715 transitions, 10381 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:53,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:53,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:43:53,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:54,991 INFO L124 PetriNetUnfolderBase]: 4165/7057 cut-off events. [2024-06-14 11:43:54,991 INFO L125 PetriNetUnfolderBase]: For 945186/945186 co-relation queries the response was YES. [2024-06-14 11:43:55,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52637 conditions, 7057 events. 4165/7057 cut-off events. For 945186/945186 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50336 event pairs, 782 based on Foata normal form. 1/7046 useless extension candidates. Maximal degree in co-relation 52392. Up to 6070 conditions per place. [2024-06-14 11:43:55,119 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 220 changer transitions 0/737 dead transitions. [2024-06-14 11:43:55,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 737 transitions, 12207 flow [2024-06-14 11:43:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:43:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:43:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 11:43:55,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 11:43:55,120 INFO L175 Difference]: Start difference. First operand has 535 places, 715 transitions, 10381 flow. Second operand 11 states and 242 transitions. [2024-06-14 11:43:55,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 737 transitions, 12207 flow [2024-06-14 11:44:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 737 transitions, 11730 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 11:44:01,959 INFO L231 Difference]: Finished difference. Result has 537 places, 718 transitions, 10392 flow [2024-06-14 11:44:01,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9914, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10392, PETRI_PLACES=537, PETRI_TRANSITIONS=718} [2024-06-14 11:44:01,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 494 predicate places. [2024-06-14 11:44:01,960 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 718 transitions, 10392 flow [2024-06-14 11:44:01,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:01,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:01,960 INFO 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 11:44:01,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-14 11:44:01,960 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:01,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash 987882227, now seen corresponding path program 17 times [2024-06-14 11:44:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360284879] [2024-06-14 11:44:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:02,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360284879] [2024-06-14 11:44:02,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360284879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:02,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:02,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:02,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279714354] [2024-06-14 11:44:02,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:02,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:02,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:44:02,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 718 transitions, 10392 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:02,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:02,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:44:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:04,020 INFO L124 PetriNetUnfolderBase]: 4162/7049 cut-off events. [2024-06-14 11:44:04,020 INFO L125 PetriNetUnfolderBase]: For 946727/946727 co-relation queries the response was YES. [2024-06-14 11:44:04,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52543 conditions, 7049 events. 4162/7049 cut-off events. For 946727/946727 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50192 event pairs, 790 based on Foata normal form. 1/7038 useless extension candidates. Maximal degree in co-relation 52297. Up to 6067 conditions per place. [2024-06-14 11:44:04,141 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 216 changer transitions 0/737 dead transitions. [2024-06-14 11:44:04,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 737 transitions, 12178 flow [2024-06-14 11:44:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:44:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:44:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 11:44:04,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 11:44:04,142 INFO L175 Difference]: Start difference. First operand has 537 places, 718 transitions, 10392 flow. Second operand 11 states and 242 transitions. [2024-06-14 11:44:04,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 737 transitions, 12178 flow [2024-06-14 11:44:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 737 transitions, 11770 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:44:11,265 INFO L231 Difference]: Finished difference. Result has 540 places, 718 transitions, 10422 flow [2024-06-14 11:44:11,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10422, PETRI_PLACES=540, PETRI_TRANSITIONS=718} [2024-06-14 11:44:11,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 497 predicate places. [2024-06-14 11:44:11,266 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 718 transitions, 10422 flow [2024-06-14 11:44:11,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:11,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:11,266 INFO 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 11:44:11,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-14 11:44:11,267 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:11,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:11,267 INFO L85 PathProgramCache]: Analyzing trace with hash -202276151, now seen corresponding path program 18 times [2024-06-14 11:44:11,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:11,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359376443] [2024-06-14 11:44:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:11,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:11,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:11,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359376443] [2024-06-14 11:44:11,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359376443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:11,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:11,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750178252] [2024-06-14 11:44:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:11,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:11,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:11,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:44:11,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 718 transitions, 10422 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:11,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:11,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:44:11,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:13,461 INFO L124 PetriNetUnfolderBase]: 4159/7049 cut-off events. [2024-06-14 11:44:13,462 INFO L125 PetriNetUnfolderBase]: For 950458/950458 co-relation queries the response was YES. [2024-06-14 11:44:13,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52481 conditions, 7049 events. 4159/7049 cut-off events. For 950458/950458 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50244 event pairs, 782 based on Foata normal form. 1/7038 useless extension candidates. Maximal degree in co-relation 52234. Up to 6064 conditions per place. [2024-06-14 11:44:13,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 214 changer transitions 0/735 dead transitions. [2024-06-14 11:44:13,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 735 transitions, 11918 flow [2024-06-14 11:44:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:44:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:44:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 11:44:13,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 11:44:13,592 INFO L175 Difference]: Start difference. First operand has 540 places, 718 transitions, 10422 flow. Second operand 10 states and 224 transitions. [2024-06-14 11:44:13,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 735 transitions, 11918 flow [2024-06-14 11:44:20,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 735 transitions, 11264 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-14 11:44:20,146 INFO L231 Difference]: Finished difference. Result has 538 places, 718 transitions, 10202 flow [2024-06-14 11:44:20,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9768, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10202, PETRI_PLACES=538, PETRI_TRANSITIONS=718} [2024-06-14 11:44:20,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 495 predicate places. [2024-06-14 11:44:20,147 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 718 transitions, 10202 flow [2024-06-14 11:44:20,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:20,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:20,156 INFO 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 11:44:20,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-14 11:44:20,157 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:20,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 259466221, now seen corresponding path program 19 times [2024-06-14 11:44:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:20,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192235862] [2024-06-14 11:44:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:20,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:20,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192235862] [2024-06-14 11:44:20,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192235862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:20,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:20,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:20,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382905140] [2024-06-14 11:44:20,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:20,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:20,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:20,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:44:20,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 718 transitions, 10202 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:20,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:20,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:44:20,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:22,419 INFO L124 PetriNetUnfolderBase]: 4212/7132 cut-off events. [2024-06-14 11:44:22,420 INFO L125 PetriNetUnfolderBase]: For 1023231/1023231 co-relation queries the response was YES. [2024-06-14 11:44:22,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53392 conditions, 7132 events. 4212/7132 cut-off events. For 1023231/1023231 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 50904 event pairs, 790 based on Foata normal form. 1/7121 useless extension candidates. Maximal degree in co-relation 53145. Up to 5789 conditions per place. [2024-06-14 11:44:22,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 394 selfloop transitions, 365 changer transitions 0/766 dead transitions. [2024-06-14 11:44:22,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 766 transitions, 13148 flow [2024-06-14 11:44:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:44:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:44:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 11:44:22,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 11:44:22,543 INFO L175 Difference]: Start difference. First operand has 538 places, 718 transitions, 10202 flow. Second operand 10 states and 238 transitions. [2024-06-14 11:44:22,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 766 transitions, 13148 flow [2024-06-14 11:44:31,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 766 transitions, 12669 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 11:44:31,216 INFO L231 Difference]: Finished difference. Result has 539 places, 739 transitions, 10780 flow [2024-06-14 11:44:31,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9723, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10780, PETRI_PLACES=539, PETRI_TRANSITIONS=739} [2024-06-14 11:44:31,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-14 11:44:31,217 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 739 transitions, 10780 flow [2024-06-14 11:44:31,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:31,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:31,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:31,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-14 11:44:31,218 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:31,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:31,218 INFO L85 PathProgramCache]: Analyzing trace with hash 153611785, now seen corresponding path program 20 times [2024-06-14 11:44:31,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:31,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211933234] [2024-06-14 11:44:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:31,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:31,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:31,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211933234] [2024-06-14 11:44:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211933234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:31,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:31,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:31,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002859531] [2024-06-14 11:44:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:31,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:31,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:44:31,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 739 transitions, 10780 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:31,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:31,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:44:31,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:33,438 INFO L124 PetriNetUnfolderBase]: 4217/7145 cut-off events. [2024-06-14 11:44:33,439 INFO L125 PetriNetUnfolderBase]: For 1039027/1039027 co-relation queries the response was YES. [2024-06-14 11:44:33,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54093 conditions, 7145 events. 4217/7145 cut-off events. For 1039027/1039027 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 51066 event pairs, 782 based on Foata normal form. 1/7134 useless extension candidates. Maximal degree in co-relation 53844. Up to 5795 conditions per place. [2024-06-14 11:44:33,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 357 changer transitions 0/769 dead transitions. [2024-06-14 11:44:33,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 769 transitions, 13271 flow [2024-06-14 11:44:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:44:33,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 11:44:33,564 INFO L175 Difference]: Start difference. First operand has 539 places, 739 transitions, 10780 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:44:33,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 769 transitions, 13271 flow [2024-06-14 11:44:40,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 769 transitions, 12578 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 11:44:40,622 INFO L231 Difference]: Finished difference. Result has 541 places, 742 transitions, 10854 flow [2024-06-14 11:44:40,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10107, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10854, PETRI_PLACES=541, PETRI_TRANSITIONS=742} [2024-06-14 11:44:40,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 498 predicate places. [2024-06-14 11:44:40,623 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 742 transitions, 10854 flow [2024-06-14 11:44:40,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:40,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:40,623 INFO 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 11:44:40,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-14 11:44:40,623 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:40,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:40,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1645919857, now seen corresponding path program 21 times [2024-06-14 11:44:40,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:40,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442659590] [2024-06-14 11:44:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:40,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:40,827 INFO 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 11:44:40,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:40,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442659590] [2024-06-14 11:44:40,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442659590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:40,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:40,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:44:40,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048346733] [2024-06-14 11:44:40,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:40,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:44:40,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:44:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:44:40,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:44:40,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 742 transitions, 10854 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:40,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:40,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:44:40,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:42,862 INFO L124 PetriNetUnfolderBase]: 4246/7216 cut-off events. [2024-06-14 11:44:42,862 INFO L125 PetriNetUnfolderBase]: For 1071119/1071125 co-relation queries the response was YES. [2024-06-14 11:44:42,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54770 conditions, 7216 events. 4246/7216 cut-off events. For 1071119/1071125 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 51734 event pairs, 777 based on Foata normal form. 5/7215 useless extension candidates. Maximal degree in co-relation 54521. Up to 6190 conditions per place. [2024-06-14 11:44:42,988 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 195 changer transitions 0/778 dead transitions. [2024-06-14 11:44:42,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 778 transitions, 13451 flow [2024-06-14 11:44:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:44:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:44:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-14 11:44:42,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-14 11:44:42,989 INFO L175 Difference]: Start difference. First operand has 541 places, 742 transitions, 10854 flow. Second operand 11 states and 249 transitions. [2024-06-14 11:44:42,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 778 transitions, 13451 flow [2024-06-14 11:44:53,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 778 transitions, 12693 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 11:44:53,226 INFO L231 Difference]: Finished difference. Result has 547 places, 754 transitions, 10683 flow [2024-06-14 11:44:53,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10126, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10683, PETRI_PLACES=547, PETRI_TRANSITIONS=754} [2024-06-14 11:44:53,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 504 predicate places. [2024-06-14 11:44:53,227 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 754 transitions, 10683 flow [2024-06-14 11:44:53,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:53,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:53,227 INFO 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 11:44:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-14 11:44:53,227 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:53,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1763001519, now seen corresponding path program 22 times [2024-06-14 11:44:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130557807] [2024-06-14 11:44:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:53,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130557807] [2024-06-14 11:44:53,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130557807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:53,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:53,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:44:53,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702153566] [2024-06-14 11:44:53,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:53,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:44:53,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:44:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:44:53,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:44:53,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 754 transitions, 10683 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:53,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:53,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:44:53,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:55,397 INFO L124 PetriNetUnfolderBase]: 4243/7208 cut-off events. [2024-06-14 11:44:55,397 INFO L125 PetriNetUnfolderBase]: For 1058586/1058592 co-relation queries the response was YES. [2024-06-14 11:44:55,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54232 conditions, 7208 events. 4243/7208 cut-off events. For 1058586/1058592 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 51639 event pairs, 785 based on Foata normal form. 5/7207 useless extension candidates. Maximal degree in co-relation 53981. Up to 6187 conditions per place. [2024-06-14 11:44:55,523 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 577 selfloop transitions, 196 changer transitions 0/780 dead transitions. [2024-06-14 11:44:55,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 780 transitions, 13153 flow [2024-06-14 11:44:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:44:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:44:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-14 11:44:55,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521978021978022 [2024-06-14 11:44:55,524 INFO L175 Difference]: Start difference. First operand has 547 places, 754 transitions, 10683 flow. Second operand 13 states and 285 transitions. [2024-06-14 11:44:55,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 780 transitions, 13153 flow [2024-06-14 11:45:04,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 780 transitions, 12759 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 11:45:04,881 INFO L231 Difference]: Finished difference. Result has 553 places, 754 transitions, 10687 flow [2024-06-14 11:45:04,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10289, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10687, PETRI_PLACES=553, PETRI_TRANSITIONS=754} [2024-06-14 11:45:04,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 510 predicate places. [2024-06-14 11:45:04,881 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 754 transitions, 10687 flow [2024-06-14 11:45:04,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:04,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:04,882 INFO 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 11:45:04,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-14 11:45:04,882 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:04,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1755649869, now seen corresponding path program 23 times [2024-06-14 11:45:04,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:04,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120600585] [2024-06-14 11:45:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:04,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:05,007 INFO 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 11:45:05,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:05,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120600585] [2024-06-14 11:45:05,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120600585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:05,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:05,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:45:05,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175595153] [2024-06-14 11:45:05,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:05,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:45:05,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:45:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:45:05,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:45:05,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 754 transitions, 10687 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:05,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:05,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:45:05,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:07,082 INFO L124 PetriNetUnfolderBase]: 4256/7230 cut-off events. [2024-06-14 11:45:07,082 INFO L125 PetriNetUnfolderBase]: For 1083106/1083112 co-relation queries the response was YES. [2024-06-14 11:45:07,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54568 conditions, 7230 events. 4256/7230 cut-off events. For 1083106/1083112 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 51802 event pairs, 788 based on Foata normal form. 5/7229 useless extension candidates. Maximal degree in co-relation 54316. Up to 6215 conditions per place. [2024-06-14 11:45:07,239 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 586 selfloop transitions, 192 changer transitions 0/785 dead transitions. [2024-06-14 11:45:07,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 785 transitions, 13240 flow [2024-06-14 11:45:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:45:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:45:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-14 11:45:07,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 11:45:07,240 INFO L175 Difference]: Start difference. First operand has 553 places, 754 transitions, 10687 flow. Second operand 12 states and 266 transitions. [2024-06-14 11:45:07,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 785 transitions, 13240 flow [2024-06-14 11:45:18,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 785 transitions, 12834 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-14 11:45:18,542 INFO L231 Difference]: Finished difference. Result has 554 places, 760 transitions, 10746 flow [2024-06-14 11:45:18,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10293, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10746, PETRI_PLACES=554, PETRI_TRANSITIONS=760} [2024-06-14 11:45:18,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 511 predicate places. [2024-06-14 11:45:18,543 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 760 transitions, 10746 flow [2024-06-14 11:45:18,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:18,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:18,543 INFO 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 11:45:18,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-14 11:45:18,544 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:18,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1335830193, now seen corresponding path program 24 times [2024-06-14 11:45:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318373147] [2024-06-14 11:45:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:18,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:18,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318373147] [2024-06-14 11:45:18,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318373147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:18,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:18,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:45:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487222561] [2024-06-14 11:45:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:18,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:45:18,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:45:18,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:45:18,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:45:18,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 760 transitions, 10746 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:18,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:18,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:45:18,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:20,833 INFO L124 PetriNetUnfolderBase]: 4253/7230 cut-off events. [2024-06-14 11:45:20,833 INFO L125 PetriNetUnfolderBase]: For 1087478/1087484 co-relation queries the response was YES. [2024-06-14 11:45:20,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54495 conditions, 7230 events. 4253/7230 cut-off events. For 1087478/1087484 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 51839 event pairs, 780 based on Foata normal form. 5/7229 useless extension candidates. Maximal degree in co-relation 54242. Up to 6211 conditions per place. [2024-06-14 11:45:20,957 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 583 selfloop transitions, 194 changer transitions 0/784 dead transitions. [2024-06-14 11:45:20,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 784 transitions, 12940 flow [2024-06-14 11:45:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:45:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:45:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-14 11:45:20,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218253968253969 [2024-06-14 11:45:20,959 INFO L175 Difference]: Start difference. First operand has 554 places, 760 transitions, 10746 flow. Second operand 12 states and 263 transitions. [2024-06-14 11:45:20,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 784 transitions, 12940 flow [2024-06-14 11:45:31,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 784 transitions, 12552 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 11:45:31,539 INFO L231 Difference]: Finished difference. Result has 557 places, 760 transitions, 10752 flow [2024-06-14 11:45:31,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10358, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10752, PETRI_PLACES=557, PETRI_TRANSITIONS=760} [2024-06-14 11:45:31,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-14 11:45:31,540 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 760 transitions, 10752 flow [2024-06-14 11:45:31,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:31,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:31,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:31,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-14 11:45:31,540 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:31,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1221657813, now seen corresponding path program 25 times [2024-06-14 11:45:31,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:31,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341655685] [2024-06-14 11:45:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:31,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:31,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:31,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341655685] [2024-06-14 11:45:31,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341655685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:31,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:31,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:45:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108681321] [2024-06-14 11:45:31,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:45:31,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:31,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:45:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:45:31,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 11:45:31,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 760 transitions, 10752 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:31,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:31,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 11:45:31,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:33,843 INFO L124 PetriNetUnfolderBase]: 4266/7248 cut-off events. [2024-06-14 11:45:33,843 INFO L125 PetriNetUnfolderBase]: For 1111172/1111178 co-relation queries the response was YES. [2024-06-14 11:45:33,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54833 conditions, 7248 events. 4266/7248 cut-off events. For 1111172/1111178 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 52014 event pairs, 784 based on Foata normal form. 5/7247 useless extension candidates. Maximal degree in co-relation 54579. Up to 6213 conditions per place. [2024-06-14 11:45:33,975 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 206 changer transitions 0/789 dead transitions. [2024-06-14 11:45:33,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 789 transitions, 13020 flow [2024-06-14 11:45:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:45:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:45:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-14 11:45:33,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-14 11:45:33,977 INFO L175 Difference]: Start difference. First operand has 557 places, 760 transitions, 10752 flow. Second operand 11 states and 246 transitions. [2024-06-14 11:45:33,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 789 transitions, 13020 flow Killed by 15